1.安装说明
本文章将演示二进制方式安装高可用k8s 1.17+，相对于其他版本，二进制安装方式并无太大区别，只需要区分每个组件版本的对应关系即可。
生产环境中，建议使用小版本大于5的Kubernetes版本，比如1.19.5以后的才可用于生产环境。
2.基本环境配置
表1-1 高可用Kubernetes集群规划
| 角色 | 机器名 | 机器配置 | ip地址 | 安装软件 |
|---|---|---|---|---|
| master1 | k8s-master01.example.local | 2C4G | 172.31.3.101 | chrony-client、containerd、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master2 | k8s-master02.example.local | 2C4G | 172.31.3.102 | chrony-client、containerd、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master3 | k8s-master03.example.local | 2C4G | 172.31.3.103 | chrony-client、containerd、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| ha1 | k8s-ha01.example.local | 2C2G | 172.31.3.104 | chrony-server、haproxy、keepalived |
| ha2 | k8s-ha02.example.local | 2C2G | 172.31.3.105 | chrony-server、haproxy、keepalived |
| harbor1 | k8s-harbor01.example.local | 2C2G | 172.31.3.106 | chrony-client、docker、docker-compose、harbor |
| harbor2 | k8s-harbor02.example.local | 2C2G | 172.31.3.107 | chrony-client、docker、docker-compose、harbor |
| etcd1 | k8s-etcd01.example.local | 2C2G | 172.31.3.108 | chrony-client、etcd |
| etcd2 | k8s-etcd02.example.local | 2C2G | 172.31.3.109 | chrony-client、etcd |
| etcd3 | k8s-etcd03.example.local | 2C2G | 172.31.3.110 | chrony-client、etcd |
| node1 | k8s-node01.example.local | 2C4G | 172.31.3.111 | chrony-client、containerd、kubelet、kube-proxy |
| node2 | k8s-node02.example.local | 2C4G | 172.31.3.112 | chrony-client、containerd、kubelet、kube-proxy |
| node3 | k8s-node03.example.local | 2C4G | 172.31.3.113 | chrony-client、containerd、kubelet、kube-proxy |
| VIP，在ha01和ha02主机实现 | 172.31.3.188 |
软件版本信息和Pod、Service网段规划：
| 配置信息 | 备注 |
|---|---|
| 支持的操作系统版本 | CentOS 7.9/stream 8、Rocky 8、Ubuntu 18.04/20.04 |
| Container Runtime | containerd v1.6.8 |
| kubernetes版本 | 1.25.2 |
| 宿主机网段 | 172.31.0.0/21 |
| Pod网段 | 192.168.0.0/12 |
| Service网段 | 10.96.0.0/12 |
注意：
集群安装时会涉及到三个网段：
宿主机网段：就是安装k8s的服务器
Pod网段：k8s Pod的网段，相当于容器的IP
Service网段：k8s service网段，service用于集群容器通信。
service网段会设置为10.96.0.0/12
Pod网段会设置成192.168.0.0/12
宿主机网段可能是172.31.0.0/21
需要注意的是这三个网段不能有任何交叉。
比如如果宿主机的IP是10.105.0.x
那么service网段就不能是10.96.0.0/12，因为10.96.0.0/12网段可用IP是：
10.96.0.1 ~ 10.111.255.255
所以10.105是在这个范围之内的，属于网络交叉，此时service网段需要更换，
可以更改为192.168.0.0/16网段（注意如果service网段是192.168开头的子网掩码最好不要是12，最好为16，因为子网掩码是12他的起始IP为192.160.0.1 不是192.168.0.1）。
同样的道理，技术别的网段也不能重复。可以通过http://tools.jb51.net/aideddesign/ip_net_calc/计算：
所以一般的推荐是，直接第一个开头的就不要重复，比如你的宿主机是192开头的，那么你的service可以是10.96.0.0/12.
如果你的宿主机是10开头的，就直接把service的网段改成192.168.0.0/16
如果你的宿主机是172开头的，就直接把pod网段改成192.168.0.0/12
注意搭配，均为10网段、172网段、192网段的搭配，第一个开头数字不一样就免去了网段冲突的可能性，也可以减去计算的步骤。
主机信息，服务器IP地址不能设置成dhcp，要配置成静态IP。
VIP（虚拟IP）不要和公司内网IP重复，首先去ping一下，不通才可用。VIP需要和主机在同一个局域网内！公有云的话，VIP为公有云的负载均衡的IP，比如阿里云的SLB地址，腾讯云的ELB地址，注意公有云的负载均衡都是内网的负载均衡。
2.1 设置ip地址
各节点设置ip地址格式如下：
#CentOS
[root@k8s-master01 ~]# cat etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
NAME=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=172.31.3.101
PREFIX=21
GATEWAY=172.31.0.2
DNS1=223.5.5.5
DNS2=180.76.76.76
#Ubuntu
root@k8s-master01:~# cat etc/netplan/01-netcfg.yaml
network:
version: 2
renderer: networkd
ethernets:
eth0:
addresses: [172.31.3.101/21]
gateway4: 172.31.0.2
nameservers:
addresses: [223.5.5.5, 180.76.76.76]
2.2 设置主机名
各节点设置主机名：
hostnamectl set-hostname k8s-master01.example.local
hostnamectl set-hostname k8s-master02.example.local
hostnamectl set-hostname k8s-master03.example.local
hostnamectl set-hostname k8s-ha01.example.local
hostnamectl set-hostname k8s-ha02.example.local
hostnamectl set-hostname k8s-harbor01.example.local
hostnamectl set-hostname k8s-harbor02.example.local
hostnamectl set-hostname k8s-etcd01.example.local
hostnamectl set-hostname k8s-etcd02.example.local
hostnamectl set-hostname k8s-etcd03.example.local
hostnamectl set-hostname k8s-node01.example.local
hostnamectl set-hostname k8s-node02.example.local
hostnamectl set-hostname k8s-node03.example.local
2.3 配置镜像源
CentOS 7所有节点配置 yum源如下：
rm -f etc/yum.repos.d/*.repo
cat > etc/yum.repos.d/base.repo <<EOF
[base]
name=base
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever/os/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\$releasever
[extras]
name=extras
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever/extras/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\$releasever
[updates]
name=updates
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever/updates/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\$releasever
[centosplus]
name=centosplus
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever/centosplus/\$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-\$releasever
[epel]
name=epel
baseurl=https://mirrors.cloud.tencent.com/epel/\$releasever/\$basearch/
gpgcheck=1
gpgkey=https://mirrors.cloud.tencent.com/epel/RPM-GPG-KEY-EPEL-\$releasever
EOF
Rocky 8所有节点配置 yum源如下：
rm -f etc/yum.repos.d/*.repo
cat > etc/yum.repos.d/base.repo <<EOF
[BaseOS]
name=BaseOS
baseurl=https://mirrors.aliyun.com/rockylinux/\$releasever/BaseOS/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[AppStream]
name=AppStream
baseurl=https://mirrors.aliyun.com/rockylinux/\$releasever/AppStream/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[extras]
name=extras
baseurl=https://mirrors.aliyun.com/rockylinux/\$releasever/extras/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[plus]
name=plus
baseurl=https://mirrors.aliyun.com/rockylinux/\$releasever/plus/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/\$releasever/Everything/\$basearch/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-\$releasever
EOF
CentOS stream 8所有节点配置 yum源如下：
rm -f etc/yum.repos.d/*.repo
cat > etc/yum.repos.d/base.repo <<EOF
[BaseOS]
name=BaseOS
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever-stream/BaseOS/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[AppStream]
name=AppStream
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever-stream/AppStream/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[extras]
name=extras
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever-stream/extras/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[centosplus]
name=centosplus
baseurl=https://mirrors.cloud.tencent.com/centos/\$releasever-stream/centosplus/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
[epel]
name=epel
baseurl=https://mirrors.cloud.tencent.com/epel/\$releasever/Everything/\$basearch/
gpgcheck=1
gpgkey=https://mirrors.cloud.tencent.com/epel/RPM-GPG-KEY-EPEL-\$releasever
EOF
Ubuntu 所有节点配置 apt源如下：
cat > etc/apt/sources.list <<EOF
deb http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs) main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs) main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-security main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-security main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-updates main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-updates main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-proposed main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-proposed main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-backports main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ $(lsb_release -cs)-backports main restricted universe multiverse
EOF
apt update
2.4 必备工具安装
#CentOS安装
yum -y install vim tree lrzsz wget jq psmisc net-tools telnet yum-utils device-mapper-persistent-data lvm2 git
#Rocky除了安装上面工具，还需要安装rsync
yum -y install rsync
#Ubuntu安装
apt -y install tree lrzsz jq
2.5 配置 ssh key 验证
配置 ssh key 验证,方便后续同步文件
Master01节点免密钥登录其他节点，安装过程中生成配置文件和证书均在Master01上操作，集群管理也在Master01上操作，阿里云或者AWS上需要单独一台kubectl服务器。密钥配置如下：
[root@k8s-master01 ~]# cat ssh_key.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-20
#FileName: ssh_key.sh
#URL: raymond.blog.csdn.net
#Description: ssh_key for CentOS 7/8 & Ubuntu 18.04/24.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
IP=`ip addr show ${NET_NAME}| awk -F" +|/" '/global/{print $3}'`
export SSHPASS=123456
HOSTS="
172.31.3.102
172.31.3.103
172.31.3.104
172.31.3.105
172.31.3.106
172.31.3.107
172.31.3.108
172.31.3.109
172.31.3.110
172.31.3.111
172.31.3.112
172.31.3.113"
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
ssh_key_push(){
rm -f ~/.ssh/id_rsa*
ssh-keygen -f root/.ssh/id_rsa -P '' &> dev/null
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
rpm -q sshpass &> dev/null || { ${COLOR}"安装sshpass软件包"${END};yum -y install sshpass &> dev/null; }
else
dpkg -S sshpass &> dev/null || { ${COLOR}"安装sshpass软件包"${END};apt -y install sshpass &> dev/null; }
fi
sshpass -e ssh-copy-id -o StrictHostKeyChecking=no ${IP} &> dev/null
[ $? -eq 0 ] && echo ${IP} is finished || echo ${IP} is false
for i in ${HOSTS};do
sshpass -e scp -o StrictHostKeyChecking=no -r root/.ssh root@${i}: &> dev/null
[ $? -eq 0 ] && echo ${i} is finished || echo ${i} is false
done
for i in ${HOSTS};do
scp root/.ssh/known_hosts ${i}:.ssh/ &> dev/null
[ $? -eq 0 ] && echo ${i} is finished || echo ${i} is false
done
}
main(){
os
ssh_key_push
}
main
[root@k8s-master01 ~]# bash ssh_key.sh
安装sshpass软件包
172.31.3.101 is finished
172.31.3.102 is finished
172.31.3.103 is finished
172.31.3.104 is finished
172.31.3.105 is finished
172.31.3.106 is finished
172.31.3.107 is finished
172.31.3.108 is finished
172.31.3.109 is finished
172.31.3.110 is finished
172.31.3.111 is finished
172.31.3.112 is finished
172.31.3.113 is finished
172.31.3.102 is finished
172.31.3.103 is finished
172.31.3.104 is finished
172.31.3.105 is finished
172.31.3.106 is finished
172.31.3.107 is finished
172.31.3.108 is finished
172.31.3.109 is finished
172.31.3.110 is finished
172.31.3.111 is finished
172.31.3.112 is finished
172.31.3.113 is finished
2.6 设置域名解析
所有节点配置hosts，修改/etc/hosts如下：
cat >> etc/hosts <<EOF
172.31.3.101 k8s-master01.example.local k8s-master01
172.31.3.102 k8s-master02.example.local k8s-master02
172.31.3.103 k8s-master03.example.local k8s-master03
172.31.3.104 k8s-ha01.example.local k8s-ha01
172.31.3.105 k8s-ha02.example.local k8s-ha02
172.31.3.106 k8s-harbor01.example.local k8s-harbor01
172.31.3.107 k8s-harbor02.example.local k8s-harbor02
172.31.3.108 k8s-etcd01.example.local k8s-etcd01
172.31.3.109 k8s-etcd02.example.local k8s-etcd02
172.31.3.110 k8s-etcd03.example.local k8s-etcd03
172.31.3.111 k8s-node01.example.local k8s-node01
172.31.3.112 k8s-node02.example.local k8s-node02
172.31.3.113 k8s-node03.example.local k8s-node03
172.31.3.188 kubeapi.raymonds.cc kubeapi
172.31.3.188 harbor.raymonds.cc harbor
EOF
for i in {102..113};do scp etc/hosts 172.31.3.$i:/etc/ ;done
2.7 关闭防火墙
#CentOS
systemctl disable --now firewalld
#CentOS 7
systemctl disable --now NetworkManager
#Ubuntu
systemctl disable --now ufw
2.8 禁用SELinux
#CentOS
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' etc/selinux/config
#Ubuntu
Ubuntu没有安装SELinux，不用设置
2.9 禁用swap
sed -ri 's/.*swap.*/#&/' etc/fstab
swapoff -a
#Ubuntu 20.04，执行下面命令
sed -ri 's/.*swap.*/#&/' etc/fstab
SD_NAME=`lsblk|awk -F"[ └─]" '/SWAP/{printf $3}'`
systemctl mask dev-${SD_NAME}.swap
swapoff -a
2.10 时间同步
ha01和ha02上安装chrony-server:
[root@k8s-ha01 ~]# cat install_chrony_server.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-11-22
#FileName: install_chrony_server.sh
#URL: raymond.blog.csdn.net
#Description: install_chrony_server for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
install_chrony(){
${COLOR}"安装chrony软件包..."${END}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
yum -y install chrony &> dev/null
sed -i -e '/^pool.*/d' -e '/^server.*/d' -e '/^# Please consider .*/a\server ntp.aliyun.com iburst\nserver time1.cloud.tencent.com iburst\nserver ntp.tuna.tsinghua.edu.cn iburst' -e 's@^#allow.*@allow 0.0.0.0/0@' -e 's@^#local.*@local stratum 10@' etc/chrony.conf
systemctl enable --now chronyd &> dev/null
systemctl is-active chronyd &> dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
else
apt -y install chrony &> dev/null
sed -i -e '/^pool.*/d' -e '/^# See http:.*/a\server ntp.aliyun.com iburst\nserver time1.cloud.tencent.com iburst\nserver ntp.tuna.tsinghua.edu.cn iburst' etc/chrony/chrony.conf
echo "allow 0.0.0.0/0" >> etc/chrony/chrony.conf
echo "local stratum 10" >> etc/chrony/chrony.conf
systemctl enable --now chronyd &> dev/null
systemctl is-active chronyd &> dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
fi
}
main(){
os
install_chrony
}
main
[root@k8s-ha01 ~]# bash install_chrony_server.sh
chrony安装完成
[root@k8s-ha02 ~]# bash install_chrony_server.sh
chrony安装完成
[root@k8s-ha01 ~]# chronyc sources -nv
210 Number of sources = 3
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 203.107.6.88 2 6 17 39 -1507us[-8009us] +/- 37ms
^- 139.199.215.251 2 6 17 39 +10ms[ +10ms] +/- 48ms
^? 101.6.6.172 0 7 0 - +0ns[ +0ns] +/- 0ns
[root@k8s-ha02 ~]# chronyc sources -nv
210 Number of sources = 3
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 203.107.6.88 2 6 17 40 +90us[-1017ms] +/- 32ms
^+ 139.199.215.251 2 6 33 37 +13ms[ +13ms] +/- 25ms
^? 101.6.6.172 0 7 0 - +0ns[ +0ns] +/- 0ns
master、node、etcd、harbor上安装chrony-client:
[root@k8s-master01 ~]# cat install_chrony_client.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-11-22
#FileName: install_chrony_client.sh
#URL: raymond.blog.csdn.net
#Description: install_chrony_client for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
SERVER1=172.31.3.104
SERVER2=172.31.3.105
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
install_chrony(){
${COLOR}"安装chrony软件包..."${END}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
yum -y install chrony &> dev/null
sed -i -e '/^pool.*/d' -e '/^server.*/d' -e '/^# Please consider .*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' etc/chrony.conf
systemctl enable --now chronyd &> dev/null
systemctl is-active chronyd &> dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
${COLOR}"chrony安装完成"${END}
else
apt -y install chrony &> dev/null
sed -i -e '/^pool.*/d' -e '/^# See http:.*/a\server '${SERVER1}' iburst\nserver '${SERVER2}' iburst' etc/chrony/chrony.conf
systemctl enable --now chronyd &> dev/null
systemctl is-active chronyd &> dev/null || { ${COLOR}"chrony 启动失败,退出!"${END} ; exit; }
systemctl restart chronyd
${COLOR}"chrony安装完成"${END}
fi
}
main(){
os
install_chrony
}
main
[root@k8s-master01 ~]# for i in k8s-master02 k8s-master03 k8s-harbor01 k8s-harbor02 k8s-etcd01 k8s-etcd02 k8s-etcd03 k8s-node01 k8s-node02 k8s-node03;do scp -o StrictHostKeyChecking=no install_chrony_client.sh $i:/root/ ; done
[root@k8s-master01 ~]# bash install_chrony_client.sh
[root@k8s-master02 ~]# bash install_chrony_client.sh
[root@k8s-master03 ~]# bash install_chrony_client.sh
[root@k8s-harbor01:~]# bash install_chrony_client.sh
[root@k8s-harbor02:~]# bash install_chrony_client.sh
[root@k8s-etcd01:~]# bash install_chrony_client.sh
[root@k8s-etcd02:~]# bash install_chrony_client.sh
[root@k8s-etcd03:~]# bash install_chrony_client.sh
[root@k8s-node01:~]# bash install_chrony_client.sh
[root@k8s-node02:~]# bash install_chrony_client.sh
[root@k8s-node03:~]# bash install_chrony_client.sh
[root@k8s-master01 ~]# chronyc sources -nv
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* k8s-ha01.example.local 3 6 37 51 +13us[-1091us] +/- 38ms
^+ k8s-ha02.example.local 3 6 37 51 -14us[-1117us] +/- 36ms
2.11 设置时区
所有节点设置时区配置如下：
ln -sf usr/share/zoneinfo/Asia/Shanghai etc/localtime
echo 'Asia/Shanghai' >/etc/timezone
#Ubuntu还要设置下面内容
cat >> etc/default/locale <<-EOF
LC_TIME=en_DK.UTF-8
EOF
2.12 优化资源限制参数
所有节点配置limit：
ulimit -SHn 65535
cat >>/etc/security/limits.conf <<EOF
* soft nofile 65536
* hard nofile 131072
* soft nproc 65535
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
EOF
2.13 内核升级
CentOS7内核是3.10，kubernetes需要内核是4.18或以上版本，CentOS7必须升级内核才可以安装kubernetes，其它系统根据自己的需求去升级
CentOS7 需要升级内核至4.18+，本地升级的版本为4.19
在master01节点下载内核：
[root@k8s-master01 ~]# wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm
[root@k8s-master01 ~]# wget http://193.49.22.109/elrepo/kernel/el7/x86_64/RPMS/kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm
从master01节点传到其他节点：
[root@k8s-master01 ~]# for i in k8s-master02 k8s-master03 k8s-node01 k8s-node02;do scp kernel-ml-4.19.12-1.el7.elrepo.x86_64.rpm kernel-ml-devel-4.19.12-1.el7.elrepo.x86_64.rpm $i:/root/ ; done所有节点安装内核
cd root && yum localinstall -y kernel-ml*master和node节点更改内核启动顺序
grub2-set-default 0 && grub2-mkconfig -o etc/grub2.cfg
grubby --args="user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
检查默认内核是不是4.19
grubby --default-kernel
[root@k8s-master01 ~]# grubby --default-kernel
/boot/vmlinuz-4.19.12-1.el7.elrepo.x86_64
所有节点重启，然后检查内核是不是4.19
reboot
uname -a
[root@k8s-master01 ~]# uname -a
Linux k8s-master01 4.19.12-1.el7.elrepo.x86_64 #1 SMP Fri Dec 21 11:06:36 EST 2018 x86_64 x86_64 x86_64 GNU/Linux
2.14 安装ipvs相关工具并优化内核
master和node安装ipvsadm：
#CentOS
yum -y install ipvsadm ipset sysstat conntrack libseccomp
#Ubuntu
apt -y install ipvsadm ipset sysstat conntrack libseccomp-dev
master和node节点配置ipvs模块，在内核4.19+版本nf_conntrack_ipv4已经改为nf_conntrack， 4.18以下使用nf_conntrack_ipv4即可：
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack #内核小于4.18，把这行改成nf_conntrack_ipv4
cat >> etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack #内核小于4.18，把这行改成nf_conntrack_ipv4
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
然后执行systemctl restart systemd-modules-load.service即可
开启一些k8s集群中必须的内核参数，master和node节点配置k8s内核：
cat > etc/sysctl.d/k8s.conf <<EOF
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
EOF
sysctl --system
Kubernetes内核优化常用参数详解：
net.ipv4.ip_forward = 1 #其值为0,说明禁止进行IP转发；如果是1,则说明IP转发功能已经打开。
net.bridge.bridge-nf-call-iptables = 1 #二层的网桥在转发包时也会被iptables的FORWARD规则所过滤，这样有时会出现L3层的iptables rules去过滤L2的帧的问题
net.bridge.bridge-nf-call-ip6tables = 1 #是否在ip6tables链中过滤IPv6包
fs.may_detach_mounts = 1 #当系统有容器运行时，需要设置为1
vm.overcommit_memory=1
#0， 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。
#1， 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。
#2， 表示内核允许分配超过所有物理内存和交换空间总和的内存
vm.panic_on_oom=0
#OOM就是out of memory的缩写，遇到内存耗尽、无法分配的状况。kernel面对OOM的时候，咱们也不能慌乱，要根据OOM参数来进行相应的处理。
#值为0：内存不足时，启动 OOM killer。
#值为1：内存不足时，有可能会触发 kernel panic（系统重启），也有可能启动 OOM killer。
#值为2：内存不足时，表示强制触发 kernel panic，内核崩溃GG（系统重启）。
fs.inotify.max_user_watches=89100 #表示同一用户同时可以添加的watch数目（watch一般是针对目录，决定了同时同一用户可以监控的目录数量）
fs.file-max=52706963 #所有进程最大的文件数
fs.nr_open=52706963 #单个进程可分配的最大文件数
net.netfilter.nf_conntrack_max=2310720 #连接跟踪表的大小，建议根据内存计算该值CONNTRACK_MAX = RAMSIZE (in bytes) 16384 (x 32)，并满足nf_conntrack_max=4*nf_conntrack_buckets，默认262144
net.ipv4.tcp_keepalive_time = 600 #KeepAlive的空闲时长，或者说每次正常发送心跳的周期，默认值为7200s（2小时）
net.ipv4.tcp_keepalive_probes = 3 #在tcp_keepalive_time之后，没有接收到对方确认，继续发送保活探测包次数，默认值为9（次）
net.ipv4.tcp_keepalive_intvl =15 #KeepAlive探测包的发送间隔，默认值为75s
net.ipv4.tcp_max_tw_buckets = 36000 #Nginx 之类的中间代理一定要关注这个值，因为它对你的系统起到一个保护的作用，一旦端口全部被占用，服务就异常了。 tcp_max_tw_buckets 能帮你降低这种情况的发生概率，争取补救时间。
net.ipv4.tcp_tw_reuse = 1 #只对客户端起作用，开启后客户端在1s内回收
net.ipv4.tcp_max_orphans = 327680 #这个值表示系统所能处理不属于任何进程的socket数量，当我们需要快速建立大量连接时，就需要关注下这个值了。
net.ipv4.tcp_orphan_retries = 3
#出现大量fin-wait-1
#首先，fin发送之后，有可能会丢弃，那么发送多少次这样的fin包呢？fin包的重传，也会采用退避方式，在2.6.358内核中采用的是指数退避，2s，4s，最后的重试次数是由tcp_orphan_retries来限制的。
net.ipv4.tcp_syncookies = 1 #tcp_syncookies是一个开关，是否打开SYN Cookie功能，该功能可以防止部分SYN攻击。tcp_synack_retries和tcp_syn_retries定义SYN的重试次数。
net.ipv4.tcp_max_syn_backlog = 16384 #进入SYN包的最大请求队列.默认1024.对重负载服务器,增加该值显然有好处.
net.ipv4.ip_conntrack_max = 65536 #表明系统将对最大跟踪的TCP连接数限制默认为65536
net.ipv4.tcp_max_syn_backlog = 16384 #指定所能接受SYN同步包的最大客户端数量，即半连接上限；
net.ipv4.tcp_timestamps = 0 #在使用 iptables 做 nat 时，发现内网机器 ping 某个域名 ping 的通，而使用 curl 测试不通, 原来是 net.ipv4.tcp_timestamps 设置了为 1 ，即启用时间戳
net.core.somaxconn = 16384 #Linux中的一个kernel参数，表示socket监听（listen）的backlog上限。什么是backlog呢？backlog就是socket的监听队列，当一个请求（request）尚未被处理或建立时，他会进入backlog。而socket server可以一次性处理backlog中的所有请求，处理后的请求不再位于监听队列中。当server处理请求较慢，以至于监听队列被填满后，新来的请求会被拒绝。
所有节点配置完内核后，重启服务器，保证重启后内核依旧加载
reboot
lsmod | grep --color=auto -e ip_vs -e nf_conntrack
[root@k8s-master01 ~]# lsmod | grep --color=auto -e ip_vs -e nf_conntrack
ip_vs_ftp 16384 0
nf_nat 32768 1 ip_vs_ftp
ip_vs_sed 16384 0
ip_vs_nq 16384 0
ip_vs_fo 16384 0
ip_vs_sh 16384 0
ip_vs_dh 16384 0
ip_vs_lblcr 16384 0
ip_vs_lblc 16384 0
ip_vs_wrr 16384 0
ip_vs_rr 16384 0
ip_vs_wlc 16384 0
ip_vs_lc 16384 0
ip_vs 151552 24 ip_vs_wlc,ip_vs_rr,ip_vs_dh,ip_vs_lblcr,ip_vs_sh,ip_vs_fo,ip_vs_nq,ip_vs_lblc,ip_vs_wrr,ip_vs_lc,ip_vs_sed,ip_vs_ftp
nf_conntrack 143360 2 nf_nat,ip_vs
nf_defrag_ipv6 20480 1 nf_conntrack
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 4 nf_conntrack,nf_nat,xfs,ip_vs
3.高可用组件安装
（注意：如果不是高可用集群，haproxy和keepalived无需安装）
公有云要用公有云自带的负载均衡，比如阿里云的SLB，腾讯云的ELB，用来替代haproxy和keepalived，因为公有云大部分都是不支持keepalived的，另外如果用阿里云的话，kubectl控制端不能放在master节点，推荐使用腾讯云，因为阿里云的slb有回环的问题，也就是slb代理的服务器不能反向访问SLB，但是腾讯云修复了这个问题。
阿里云需要设置：slb -> haproxy -> apiserver
3.1 安装haproxy
在ha01和ha02安装HAProxy：
[root@k8s-ha01 ~]# cat install_haproxy.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-04-14
#FileName: install_haproxy.sh
#URL: raymond.blog.csdn.net
#Description: The test script
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
#lua下载地址：http://www.lua.org/ftp/lua-5.4.4.tar.gz
LUA_FILE=lua-5.4.4.tar.gz
#haproxy下载地址：https://www.haproxy.org/download/2.6/src/haproxy-2.6.4.tar.gz
HAPROXY_FILE=haproxy-2.6.4.tar.gz
HAPROXY_INSTALL_DIR=/apps/haproxy
STATS_AUTH_USER=admin
STATS_AUTH_PASSWORD=123456
VIP=172.31.3.188
MASTER01=172.31.3.101
MASTER02=172.31.3.102
MASTER03=172.31.3.103
HARBOR01=172.31.3.106
HARBOR02=172.31.3.107
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
${COLOR}'检查Haproxy相关源码包'${END}
if [ ! -e ${LUA_FILE} ];then
${COLOR}"缺少${LUA_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${HAPROXY_FILE} ];then
${COLOR}"缺少${HAPROXY_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_haproxy(){
[ -d ${HAPROXY_INSTALL_DIR} ] && { ${COLOR}"Haproxy已存在，安装失败"${END};exit; }
${COLOR}"开始安装Haproxy"${END}
${COLOR}"开始安装Haproxy依赖包"${END}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
yum -y install gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl openssl-devel systemd-devel libtermcap-devel ncurses-devel libevent-devel readline-devel &> dev/null
else
apt update &> dev/null;apt -y install gcc make openssl libssl-dev libpcre3 libpcre3-dev zlib1g-dev libreadline-dev libsystemd-dev &> dev/null
fi
tar xf ${LUA_FILE}
LUA_DIR=`echo ${LUA_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${LUA_DIR}
make all test
cd ${SRC_DIR}
tar xf ${HAPROXY_FILE}
HAPROXY_DIR=`echo ${HAPROXY_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${HAPROXY_DIR}
make -j ${CPUS} ARCH=x86_64 TARGET=linux-glibc USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 USE_CPU_AFFINITY=1 USE_LUA=1 LUA_INC=${SRC_DIR}/${LUA_DIR}/src/ LUA_LIB=${SRC_DIR}/${LUA_DIR}/src/ PREFIX=${HAPROXY_INSTALL_DIR}
make install PREFIX=${HAPROXY_INSTALL_DIR}
[ $? -eq 0 ] && $COLOR"Haproxy编译安装成功"$END || { $COLOR"Haproxy编译安装失败,退出!"$END;exit; }
cat > lib/systemd/system/haproxy.service <<-EOF
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target
[Service]
ExecStartPre=/usr/sbin/haproxy -f etc/haproxy/haproxy.cfg -c -q
ExecStart=/usr/sbin/haproxy -Ws -f etc/haproxy/haproxy.cfg -p var/lib/haproxy/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID
[Install]
WantedBy=multi-user.target
EOF
[ -L usr/sbin/haproxy ] || ln -s ../..${HAPROXY_INSTALL_DIR}/sbin/haproxy usr/sbin/ &> dev/null
[ -d etc/haproxy ] || mkdir etc/haproxy &> dev/null
[ -d var/lib/haproxy/ ] || mkdir -p var/lib/haproxy/ &> dev/null
cat > etc/haproxy/haproxy.cfg <<-EOF
global
maxconn 100000
chroot ${HAPROXY_INSTALL_DIR}
stats socket var/lib/haproxy/haproxy.sock mode 600 level admin
uid 99
gid 99
daemon
pidfile var/lib/haproxy/haproxy.pid
log 127.0.0.1 local3 info
defaults
option http-keep-alive
option forwardfor
maxconn 100000
mode http
timeout connect 300000ms
timeout client 300000ms
timeout server 300000ms
listen stats
mode http
bind 0.0.0.0:9999
stats enable
log global
stats uri haproxy-status
stats auth ${STATS_AUTH_USER}:${STATS_AUTH_PASSWORD}
listen kubernetes-6443
bind ${VIP}:6443
mode tcp
log global
server ${MASTER01} ${MASTER01}:6443 check inter 3s fall 2 rise 5
server ${MASTER02} ${MASTER02}:6443 check inter 3s fall 2 rise 5
server ${MASTER03} ${MASTER03}:6443 check inter 3s fall 2 rise 5
listen harbor-80
bind ${VIP}:80
mode http
log global
balance source
server ${HARBOR01} ${HARBOR01}:80 check inter 3s fall 2 rise 5
server ${HARBOR02} ${HARBOR02}:80 check inter 3s fall 2 rise 5
EOF
cat >> etc/sysctl.conf <<-EOF
net.ipv4.ip_nonlocal_bind = 1
EOF
sysctl -p &> dev/null
echo "PATH=${HAPROXY_INSTALL_DIR}/sbin:${PATH}" > etc/profile.d/haproxy.sh
systemctl daemon-reload
systemctl enable --now haproxy &> dev/null
systemctl is-active haproxy &> dev/null && ${COLOR}"Haproxy 服务启动成功!"${END} || { ${COLOR}"Haproxy 启动失败,退出!"${END} ; exit; }
${COLOR}"Haproxy安装完成"${END}
}
main(){
os
check_file
install_haproxy
}
main
[root@k8s-ha01 ~]# bash install_haproxy.sh
[root@k8s-ha02 ~]# bash install_haproxy.sh
3.2 安装keepalived
所有master节点配置KeepAlived健康检查文件：
[root@k8s-ha02 ~]# cat check_haproxy.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-01-09
#FileName: check_haproxy.sh
#URL: raymond.blog.csdn.net
#Description: The test script
#Copyright (C): 2022 All rights reserved
#*********************************************************************************************
err=0
for k in $(seq 1 3);do
check_code=$(pgrep haproxy)
if [[ $check_code == "" ]]; then
err=$(expr $err + 1)
sleep 1
continue
else
err=0
break
fi
done
if [[ $err != "0" ]]; then
echo "systemctl stop keepalived"
usr/bin/systemctl stop keepalived
exit 1
else
exit 0
fi
在ha01和ha02节点安装KeepAlived，配置不一样，注意区分 [root@k8s-master01 pki]# vim etc/keepalived/keepalived.conf ，注意每个节点的网卡（interface参数）
在ha01节点上安装keepalived-master：
[root@k8s-ha01 ~]# cat install_keepalived_master.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-29
#FileName: install_keepalived_master.sh
#URL: raymond.blog.csdn.net
#Description: install_keepalived for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
KEEPALIVED_URL=https://keepalived.org/software/
KEEPALIVED_FILE=keepalived-2.2.7.tar.gz
KEEPALIVED_INSTALL_DIR=/apps/keepalived
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
STATE=MASTER
PRIORITY=100
VIP=172.31.3.188
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
rpm -q wget &> dev/null || yum -y install wget &> dev/null
fi
if [ ! -e ${KEEPALIVED_FILE} ];then
${COLOR}"缺少${KEEPALIVED_FILE}文件,如果是离线包,请放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载Keepalived源码包'${END}
wget ${KEEPALIVED_URL}${KEEPALIVED_FILE} || { ${COLOR}"Keepalived源码包下载失败"${END}; exit; }
elif [ ! -e check_haproxy.sh ];then
${COLOR}"缺少check_haproxy.sh文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_keepalived(){
[ -d ${KEEPALIVED_INSTALL_DIR} ] && { ${COLOR}"Keepalived已存在，安装失败"${END};exit; }
${COLOR}"开始安装Keepalived"${END}
${COLOR}"开始安装Keepalived依赖包"${END}
if [ ${OS_ID} == "Rocky" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.sjtug.sjtu.edu.cn
if [ ! `grep -R "\[PowerTools\]" etc/yum.repos.d/` ];then
cat > etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/rocky/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
EOF
fi
fi
if [ ${OS_ID} == "CentOS" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.cloud.tencent.com
if [ ! `grep -R "\[PowerTools\]" etc/yum.repos.d/` ];then
cat > etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/centos/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
EOF
fi
fi
if [[ ${OS_RELEASE_VERSION} == 8 ]] &> dev/null;then
yum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset-devel file-devel net-snmp-devel glib2-devel pcre2-devel libnftnl-devel libmnl-devel systemd-devel &> dev/null
elif [[ ${OS_RELEASE_VERSION} == 7 ]] &> dev/null;then
yum -y install make gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute &> dev/null
elif [[ ${OS_RELEASE_VERSION} == 20 ]] &> dev/null;then
apt update &> dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev
else
apt update &> dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf iptables-dev libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev &> dev/null
fi
tar xf ${KEEPALIVED_FILE}
KEEPALIVED_DIR=`echo ${KEEPALIVED_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${KEEPALIVED_DIR}
./configure --prefix=${KEEPALIVED_INSTALL_DIR} --disable-fwmark
make -j $CPUS && make install
[ $? -eq 0 ] && ${COLOR}"Keepalived编译安装成功"${END} || { ${COLOR}"Keepalived编译安装失败,退出!"${END};exit; }
[ -d etc/keepalived ] || mkdir -p etc/keepalived &> dev/null
cat > etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script check_haoroxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state ${STATE}
interface ${NET_NAME}
virtual_router_id 51
priority ${PRIORITY}
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
${VIP} dev ${NET_NAME} label ${NET_NAME}:1
}
track_script {
check_haproxy
}
}
EOF
cp ./keepalived/keepalived.service lib/systemd/system/
cd ${SRC_DIR}
mv check_haproxy.sh etc/keepalived/check_haproxy.sh
chmod +x etc/keepalived/check_haproxy.sh
echo "PATH=${KEEPALIVED_INSTALL_DIR}/sbin:${PATH}" > etc/profile.d/keepalived.sh
systemctl daemon-reload
systemctl enable --now keepalived &> dev/null
systemctl is-active keepalived &> dev/null && ${COLOR}"Keepalived 服务启动成功!"${END} || { ${COLOR}"Keepalived 启动失败,退出!"${END} ; exit; }
${COLOR}"Keepalived安装完成"${END}
}
main(){
os
check_file
install_keepalived
}
main
[root@k8s-ha01 ~]# bash install_keepalived_master.sh
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
在ha02节点上安装keepalived-backup：
[root@k8s-ha02 ~]# cat install_keepalived_backup.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-29
#FileName: install_keepalived_backup.sh
#URL: raymond.blog.csdn.net
#Description: install_keepalived for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
KEEPALIVED_URL=https://keepalived.org/software/
KEEPALIVED_FILE=keepalived-2.2.7.tar.gz
KEEPALIVED_INSTALL_DIR=/apps/keepalived
CPUS=`lscpu |awk '/^CPU\(s\)/{print $2}'`
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
STATE=BACKUP
PRIORITY=90
VIP=172.31.3.188
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
rpm -q wget &> dev/null || yum -y install wget &> dev/null
fi
if [ ! -e ${KEEPALIVED_FILE} ];then
${COLOR}"缺少${KEEPALIVED_FILE}文件,如果是离线包,请放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载Keepalived源码包'${END}
wget ${KEEPALIVED_URL}${KEEPALIVED_FILE} || { ${COLOR}"Keepalived源码包下载失败"${END}; exit; }
elif [ ! -e check_haproxy.sh ];then
${COLOR}"缺少check_haproxy.sh文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_keepalived(){
[ -d ${KEEPALIVED_INSTALL_DIR} ] && { ${COLOR}"Keepalived已存在，安装失败"${END};exit; }
${COLOR}"开始安装Keepalived"${END}
${COLOR}"开始安装Keepalived依赖包"${END}
if [ ${OS_ID} == "Rocky" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.sjtug.sjtu.edu.cn
if [ ! `grep -R "\[PowerTools\]" etc/yum.repos.d/` ];then
cat > etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/rocky/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rockyofficial
EOF
fi
fi
if [ ${OS_ID} == "CentOS" -a ${OS_RELEASE_VERSION} == 8 ];then
URL=mirrors.cloud.tencent.com
if [ ! `grep -R "\[PowerTools\]" etc/yum.repos.d/` ];then
cat > etc/yum.repos.d/PowerTools.repo <<-EOF
[PowerTools]
name=PowerTools
baseurl=https://${URL}/centos/\$releasever/PowerTools/\$basearch/os/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-centosofficial
EOF
fi
fi
if [[ ${OS_RELEASE_VERSION} == 8 ]] &> dev/null;then
yum -y install make gcc ipvsadm autoconf automake openssl-devel libnl3-devel iptables-devel ipset-devel file-devel net-snmp-devel glib2-devel pcre2-devel libnftnl-devel libmnl-devel systemd-devel &> dev/null
elif [[ ${OS_RELEASE_VERSION} == 7 ]] &> dev/null;then
yum -y install make gcc libnfnetlink-devel libnfnetlink ipvsadm libnl libnl-devel libnl3 libnl3-devel lm_sensors-libs net-snmp-agent-libs net-snmp-libs openssh-server openssh-clients openssl openssl-devel automake iproute &> dev/null
elif [[ ${OS_RELEASE_VERSION} == 20 ]] &> dev/null;then
apt update &> dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev
else
apt update &> dev/null;apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf iptables-dev libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev libip6tc-dev libipset-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev libmnl-dev libsystemd-dev &> dev/null
fi
tar xf ${KEEPALIVED_FILE}
KEEPALIVED_DIR=`echo ${KEEPALIVED_FILE} | sed -nr 's/^(.*[0-9]).([[:lower:]]).*/\1/p'`
cd ${KEEPALIVED_DIR}
./configure --prefix=${KEEPALIVED_INSTALL_DIR} --disable-fwmark
make -j $CPUS && make install
[ $? -eq 0 ] && ${COLOR}"Keepalived编译安装成功"${END} || { ${COLOR}"Keepalived编译安装失败,退出!"${END};exit; }
[ -d etc/keepalived ] || mkdir -p etc/keepalived &> dev/null
cat > etc/keepalived/keepalived.conf <<EOF
! Configuration File for keepalived
global_defs {
router_id LVS_DEVEL
script_user root
enable_script_security
}
vrrp_script check_haoroxy {
script "/etc/keepalived/check_haproxy.sh"
interval 5
weight -5
fall 2
rise 1
}
vrrp_instance VI_1 {
state ${STATE}
interface ${NET_NAME}
virtual_router_id 51
priority ${PRIORITY}
advert_int 1
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
${VIP} dev ${NET_NAME} label ${NET_NAME}:1
}
track_script {
check_haproxy
}
}
EOF
cp ./keepalived/keepalived.service lib/systemd/system/
cd ${SRC_DIR}
mv check_haproxy.sh etc/keepalived/check_haproxy.sh
chmod +x etc/keepalived/check_haproxy.sh
echo "PATH=${KEEPALIVED_INSTALL_DIR}/sbin:${PATH}" > etc/profile.d/keepalived.sh
systemctl daemon-reload
systemctl enable --now keepalived &> dev/null
systemctl is-active keepalived &> dev/null && ${COLOR}"Keepalived 服务启动成功!"${END} || { ${COLOR}"Keepalived 启动失败,退出!"${END} ; exit; }
${COLOR}"Keepalived安装完成"${END}
}
main(){
os
check_file
install_keepalived
}
main
[root@k8s-ha02 ~]# bash install_keepalived_backup.sh
3.3 测试访问
172.31.3.188 kubeapi.raymonds.cc浏览器访问验证,用户名密码: admin:123456
http://kubeapi.raymonds.cc:9999/haproxy-status
4.安装harbor
4.1 安装harbor
在harbor01和harbor02上安装harbor:
[root@k8s-harbor01 ~]# cat install_docker_binary_compose_harbor.sh
#!/bin/bash
#
#**************************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-15
#FileName: install_docker_binary_compose_harbor.sh
#URL: raymond.blog.csdn.net
#Description: install_docker_binary_compose_harbor for CentOS 7/8 & Ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2021 All rights reserved
#**************************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
URL='https://mirrors.cloud.tencent.com/docker-ce/linux/static/stable/x86_64/'
DOCKER_FILE=docker-20.10.18.tgz
#docker-compose下载地址:https://github.com/docker/compose/releases/download/v2.10.2/docker-compose-linux-x86_64
DOCKER_COMPOSE_FILE=docker-compose-linux-x86_64
#harbor下载地址:https://github.com/goharbor/harbor/releases/download/v2.6.0/harbor-offline-installer-v2.6.0.tgz
HARBOR_FILE=harbor-offline-installer-v
HARBOR_VERSION=2.6.0
TAR=.tgz
HARBOR_INSTALL_DIR=/apps
HARBOR_DOMAIN=harbor.raymonds.cc
NET_NAME=`ip addr |awk -F"[: ]" '/^2: e.*/{print $3}'`
IP=`ip addr show ${NET_NAME}| awk -F" +|/" '/global/{print $3}'`
HARBOR_ADMIN_PASSWORD=123456
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
OS_RELEASE_VERSION=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
rpm -q wget &> dev/null || yum -y install wget &> dev/null
fi
if [ ! -e ${DOCKER_FILE} ];then
${COLOR}"缺少${DOCKER_FILE}文件,如果是离线包,请把文件放到${SRC_DIR}目录下"${END}
${COLOR}'开始下载DOCKER二进制源码包'${END}
wget ${URL}${DOCKER_FILE} || { ${COLOR}"DOCKER二进制安装包下载失败"${END}; exit; }
elif [ ! -e ${DOCKER_COMPOSE_FILE} ];then
${COLOR}"缺少${DOCKER_COMPOSE_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${HARBOR_FILE}${HARBOR_VERSION}${TAR} ];then
${COLOR}"缺少${HARBOR_FILE}${HARBOR_VERSION}${TAR}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_docker(){
tar xf ${DOCKER_FILE}
mv docker/* usr/bin/
cat > lib/systemd/system/docker.service <<-EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
ExecStart=/usr/bin/dockerd -H unix://var/run/docker.sock
ExecReload=/bin/kill -s HUP \$MAINPID
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Uncomment TasksMax if your systemd version supports it.
# Only systemd 226 and above support this version.
#TasksMax=infinity
TimeoutStartSec=0
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
# restart the docker process if it exits prematurely
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
[Install]
WantedBy=multi-user.target
EOF
mkdir -p etc/docker
cat > etc/docker/daemon.json <<-EOF
{
"registry-mirrors": [
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn"
],
"insecure-registries": ["${HARBOR_DOMAIN}"],
"exec-opts": ["native.cgroupdriver=systemd"],
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 5,
"log-opts": {
"max-size": "300m",
"max-file": "2"
},
"live-restore": true
}
EOF
echo 'alias rmi="docker images -qa|xargs docker rmi -f"' >> ~/.bashrc
echo 'alias rmc="docker ps -qa|xargs docker rm -f"' >> ~/.bashrc
systemctl daemon-reload
systemctl enable --now docker &> dev/null
systemctl is-active docker &> dev/null && ${COLOR}"Docker 服务启动成功"${END} || { ${COLOR}"Docker 启动失败"${END};exit; }
docker version && ${COLOR}"Docker 安装成功"${END} || ${COLOR}"Docker 安装失败"${END}
}
install_docker_compose(){
${COLOR}"开始安装 Docker compose....."${END}
sleep 1
mv ${SRC_DIR}/${DOCKER_COMPOSE_FILE} usr/bin/docker-compose
chmod +x usr/bin/docker-compose
docker-compose --version && ${COLOR}"Docker Compose 安装完成"${END} || ${COLOR}"Docker compose 安装失败"${END}
}
install_harbor(){
${COLOR}"开始安装 Harbor....."${END}
sleep 1
[ -d ${HARBOR_INSTALL_DIR} ] || mkdir ${HARBOR_INSTALL_DIR}
tar xf ${SRC_DIR}/${HARBOR_FILE}${HARBOR_VERSION}${TAR} -C ${HARBOR_INSTALL_DIR}/
mv ${HARBOR_INSTALL_DIR}/harbor/harbor.yml.tmpl ${HARBOR_INSTALL_DIR}/harbor/harbor.yml
sed -ri.bak -e 's/^(hostname:) .*/\1 '${IP}'/' -e 's/^(harbor_admin_password:) .*/\1 '${HARBOR_ADMIN_PASSWORD}'/' -e 's/^(https:)/#\1/' -e 's/ (port: 443)/# \1/' -e 's@ (certificate: .*)@# \1@' -e 's@ (private_key: .*)@# \1@' ${HARBOR_INSTALL_DIR}/harbor/harbor.yml
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ] &> dev/null;then
yum -y install python3 &> dev/null || { ${COLOR}"安装软件包失败，请检查网络配置"${END}; exit; }
else
apt -y install python3 &> dev/null || { ${COLOR}"安装软件包失败，请检查网络配置"${END}; exit; }
fi
${HARBOR_INSTALL_DIR}/harbor/install.sh && ${COLOR}"Harbor 安装完成"${END} || ${COLOR}"Harbor 安装失败"${END}
cat > lib/systemd/system/harbor.service <<-EOF
[Unit]
Description=Harbor
After=docker.service systemd-networkd.service systemd-resolved.service
Requires=docker.service
Documentation=http://github.com/vmware/harbor
[Service]
Type=simple
Restart=on-failure
RestartSec=5
ExecStart=/usr/bin/docker-compose -f apps/harbor/docker-compose.yml up
ExecStop=/usr/bin/docker-compose -f apps/harbor/docker-compose.yml down
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable harbor &>/dev/null && ${COLOR}"Harbor已配置为开机自动启动"${END}
}
set_swap_limit(){
if [ ${OS_ID} == "Ubuntu" ];then
${COLOR}'设置Docker的"WARNING: No swap limit support"警告'${END}
sed -ri '/^GRUB_CMDLINE_LINUX=/s@"$@ swapaccount=1"@' etc/default/grub
update-grub &> dev/null
${COLOR}"10秒后，机器会自动重启"${END}
sleep 10
reboot
fi
}
main(){
os
check_file
[ -f usr/bin/docker ] && ${COLOR}"Docker已安装"${END} || install_docker
docker-compose --version &> dev/null && ${COLOR}"Docker Compose已安装"${END} || install_docker_compose
systemctl is-active harbor &> dev/null && ${COLOR}"Harbor已安装"${END} || install_harbor
grep -q "swapaccount=1" etc/default/grub && ${COLOR}'"WARNING: No swap limit support"警告,已设置'${END} || set_swap_limit
}
main
[root@k8s-harbor01 ~]# bash install_docker_compose_harbor.sh
[root@k8s-harbor02 ~]# bash install_docker_compose_harbor.sh
4.2 创建harbor仓库
在harbor01新建项目google_containers
http://172.31.3.106/
用户名：admin 密码:123456
在harbor02新建项目google_containers
http://172.31.3.107/
用户名：admin 密码:123456
在harbor02上新建目标
在harbor02上新建规则
在harbor01上新建目标
在harbor01上新建规则
5.部署etcd
5.1 安装etcd组件
https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.25.md#server-binaries
在官网查看kubernetes v1.25的etcd版本是v3.5.4
下载etcd安装包
[root@k8s-etcd01 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.5.4/etcd-v3.5.4-linux-amd64.tar.gz解压etcd安装文件
[root@k8s-etcd01 ~]# tar -xf etcd-v3.5.4-linux-amd64.tar.gz --strip-components=1 -C usr/local/bin etcd-v3.5.4-linux-amd64/etcd{,ctl}版本查看
[root@k8s-etcd01 ~]# etcdctl version
etcdctl version: 3.5.4
API version: 3.5
将组件发送到其他节点
[root@k8s-etcd01 ~]# for NODE in k8s-etcd02 k8s-etcd03; do echo $NODE; scp -o StrictHostKeyChecking=no usr/local/bin/etcd* $NODE:/usr/local/bin/; doneetcd节点创建/opt/cni/bin目录
[root@k8s-etcd01 ~]# mkdir -p opt/cni/bin
[root@k8s-etcd02 ~]# mkdir -p opt/cni/bin
[root@k8s-etcd03 ~]# mkdir -p opt/cni/bin
5.2 生成etcd证书
二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的
etcd01下载生成证书工具
[root@k8s-etcd01 ~]# wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
[root@k8s-etcd01 ~]# wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
[root@k8s-etcd01 ~]# mv cfssl_1.6.1_linux_amd64 usr/local/bin/cfssl
[root@k8s-etcd01 ~]# mv cfssljson_1.6.1_linux_amd64 usr/local/bin/cfssljson
[root@k8s-etcd01 ~]# chmod +x usr/local/bin/cfssl usr/local/bin/cfssljson
etcd节点创建etcd证书目录
[root@k8s-etcd01 ~]# mkdir etc/etcd/ssl -p
[root@k8s-etcd02 ~]# mkdir etc/etcd/ssl -p
[root@k8s-etcd03 ~]# mkdir etc/etcd/ssl -p
etcd01节点生成etcd证书
生成证书的CSR文件：证书签名请求文件，配置了一些域名、公司、单位
[root@k8s-etcd01 ~]# mkdir pki
[root@k8s-etcd01 ~]# cd pki/
[root@k8s-etcd01 pki]# cat > etcd-ca-csr.json <<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
# 生成etcd CA证书和CA证书的key
[root@k8s-etcd01 pki]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare etc/etcd/ssl/etcd-ca
#执行结果
2022/09/25 16:22:04 [INFO] generating a new CA key and certificate from CSR
2022/09/25 16:22:04 [INFO] generate received request
2022/09/25 16:22:04 [INFO] received CSR
2022/09/25 16:22:04 [INFO] generating key: rsa-2048
2022/09/25 16:22:04 [INFO] encoded CSR
2022/09/25 16:22:04 [INFO] signed certificate with serial number 555179846778058823596990590382129342677441232285
[root@k8s-etcd01 pki]# ll etc/etcd/ssl/etcd-ca*
-rw-r--r-- 1 root root 1050 Sep 25 16:22 etc/etcd/ssl/etcd-ca.csr
-rw------- 1 root root 1679 Sep 25 16:22 etc/etcd/ssl/etcd-ca-key.pem
-rw-r--r-- 1 root root 1318 Sep 25 16:22 etc/etcd/ssl/etcd-ca.pem
[root@k8s-etcd01 pki]# cat > ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
[root@k8s-etcd01 pki]# cat > etcd-csr.json <<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
[root@k8s-etcd01 pki]# cfssl gencert \
-ca=/etc/etcd/ssl/etcd-ca.pem \
-ca-key=/etc/etcd/ssl/etcd-ca-key.pem \
-config=ca-config.json \
-hostname=127.0.0.1,k8s-etcd01,k8s-etcd02,k8s-etcd03,172.31.3.108,172.31.3.109,172.31.3.110 \
-profile=kubernetes \
etcd-csr.json | cfssljson -bare etc/etcd/ssl/etcd
#执行结果
2022/09/25 16:22:51 [INFO] generate received request
2022/09/25 16:22:51 [INFO] received CSR
2022/09/25 16:22:51 [INFO] generating key: rsa-2048
2022/09/25 16:22:51 [INFO] encoded CSR
2022/09/25 16:22:51 [INFO] signed certificate with serial number 620811890976823698243438547142971255657636352843
[root@k8s-etcd01 pki]# ll etc/etcd/ssl/etcd*
...
-rw-r--r-- 1 root root 1123 Sep 25 16:22 etc/etcd/ssl/etcd.csr
-rw------- 1 root root 1675 Sep 25 16:22 etc/etcd/ssl/etcd-key.pem
-rw-r--r-- 1 root root 1456 Sep 25 16:22 etc/etcd/ssl/etcd.pem
将etcd证书复制到其他etcd节点
[root@k8s-etcd01 pki]# for NODE in k8s-etcd02 k8s-etcd03; do
ssh -o StrictHostKeyChecking=no $NODE "mkdir -p etc/etcd/ssl"
for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do
scp -o StrictHostKeyChecking=no etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}
done
done
5.3 Etcd配置
etcd配置大致相同，注意修改每个etcd节点的etcd配置的主机名和IP地址
5.3.1 etcd01
[root@k8s-etcd01 pki]# cat > etc/etcd/etcd.config.yml <<EOF
name: 'k8s-etcd01'
data-dir: var/lib/etcd
wal-dir: var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://172.31.3.108:2380'
listen-client-urls: 'https://172.31.3.108:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.108:2380'
advertise-client-urls: 'https://172.31.3.108:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
5.3.2 etcd02
[root@k8s-etcd02 ~]# cat > etc/etcd/etcd.config.yml <<EOF
name: 'k8s-etcd02'
data-dir: var/lib/etcd
wal-dir: var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://172.31.3.109:2380'
listen-client-urls: 'https://172.31.3.109:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.109:2380'
advertise-client-urls: 'https://172.31.3.109:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
5.3.3 etcd03
[root@k8s-etcd03 ~]# cat > etc/etcd/etcd.config.yml <<EOF
name: 'k8s-etcd03'
data-dir: var/lib/etcd
wal-dir: var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://172.31.3.110:2380'
listen-client-urls: 'https://172.31.3.110:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://172.31.3.110:2380'
advertise-client-urls: 'https://172.31.3.110:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-etcd01=https://172.31.3.108:2380,k8s-etcd02=https://172.31.3.109:2380,k8s-etcd03=https://172.31.3.110:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
5.3.4 创建Service
所有etcd节点创建etcd service并启动
[root@k8s-etcd01 pki]# cat > lib/systemd/system/etcd.service <<EOF
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
[root@k8s-etcd01 pki]# for NODE in k8s-etcd02 k8s-etcd03; do scp lib/systemd/system/etcd.service $NODE:/lib/systemd/system/;done
所有etcd节点创建etcd的证书目录
[root@k8s-etcd01 pki]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-etcd02 ~]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-etcd03 ~]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-etcd01 pki]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
[root@k8s-etcd02 ~]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
[root@k8s-etcd03 ~]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
[root@k8s-etcd01 pki]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd02 ~]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd03 ~]# systemctl daemon-reload && systemctl enable --now etcd
[root@k8s-etcd01 pki]# systemctl status etcd
● etcd.service - Etcd Service
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2022-09-25 16:24:46 CST; 8s ago
Docs: https://coreos.com/etcd/docs/latest/
Main PID: 5085 (etcd)
Tasks: 8 (limit: 11192)
Memory: 26.5M
CGroup: system.slice/etcd.service
└─5085 usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Sep 25 16:24:47 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:47.996+0800","caller":"rafthttp/stream.go:249","ms>
Sep 25 16:24:47 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:47.996+0800","caller":"rafthttp/stream.go:274","ms>
Sep 25 16:24:48 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:48.017+0800","caller":"etcdserver/server.go:775",">
Sep 25 16:24:48 k8s-etcd01.example.local etcd[5085]: {"level":"warn","ts":"2022-09-25T16:24:48.034+0800","caller":"rafthttp/probing_status.go:>
Sep 25 16:24:48 k8s-etcd01.example.local etcd[5085]: {"level":"warn","ts":"2022-09-25T16:24:48.034+0800","caller":"rafthttp/probing_status.go:>
Sep 25 16:24:48 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:48.059+0800","caller":"rafthttp/stream.go:412","ms>
Sep 25 16:24:48 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:48.067+0800","caller":"rafthttp/stream.go:412","ms>
Sep 25 16:24:50 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:50.670+0800","caller":"etcdserver/server.go:2512",>
Sep 25 16:24:50 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:50.672+0800","caller":"membership/cluster.go:576",>
Sep 25 16:24:50 k8s-etcd01.example.local etcd[5085]: {"level":"info","ts":"2022-09-25T16:24:50.672+0800","caller":"etcdserver/server.go:2531",>
[root@k8s-etcd02 ~]# systemctl status etcd
[root@k8s-etcd03 ~]# systemctl status etcd
查看etcd状态
[root@k8s-etcd01 pki]# export ETCDCTL_API=3
[root@k8s-etcd01 pki]# etcdctl --endpoints="172.31.3.108:2379,172.31.3.109:2379,172.31.3.110:2379" --cacert=/etc/kubernetes/pki/etcd/etcd-ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem endpoint status --write-out=table
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| 172.31.3.108:2379 | a9fef56ff96ed75c | 3.5.4 | 20 kB | true | false | 2 | 9 | 9 | |
| 172.31.3.109:2379 | 8319ef09e8b3d277 | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | |
| 172.31.3.110:2379 | 209a1f57c506dba2 | 3.5.4 | 20 kB | false | false | 2 | 9 | 9 | |
+-------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
重要：如果安装了keepalived和haproxy，需要测试keepalived是否是正常的
#测试VIP
[root@k8s-master01 pki]# ping 172.31.3.188
PING 172.31.3.188 (172.31.3.188) 56(84) bytes of data.
64 bytes from 172.31.3.188: icmp_seq=1 ttl=64 time=1.27 ms
64 bytes from 172.31.3.188: icmp_seq=2 ttl=64 time=0.585 ms
^C
--- 172.31.3.188 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.585/0.931/1.277/0.346 ms
[root@k8s-ha01 ~]# systemctl stop keepalived
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-ha02 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:5e:d8:f8 brd ff:ff:ff:ff:ff:ff
inet 172.31.3.105/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe5e:d8f8/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-ha01 ~]# systemctl start keepalived
[root@k8s-ha01 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:05:9b:2a brd ff:ff:ff:ff:ff:ff
inet 172.31.3.104/21 brd 172.31.7.255 scope global eth0
valid_lft forever preferred_lft forever
inet 172.31.3.188/32 scope global eth0:1
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe05:9b2a/64 scope link
valid_lft forever preferred_lft forever
[root@k8s-master01 pki]# telnet 172.31.3.188 6443
Trying 172.31.3.188...
Connected to 172.31.3.188.
Escape character is '^]'.
Connection closed by foreign host.
如果ping不通且telnet没有出现 ] ，则认为VIP不可以，不可在继续往下执行，需要排查keepalived的问题，比如防火墙和selinux，haproxy和keepalived的状态，监听端口等
所有节点查看防火墙状态必须为disable和inactive：systemctl status firewalld
所有节点查看selinux状态，必须为disable：getenforce
master节点查看haproxy和keepalived状态：systemctl status keepalived haproxy
master节点查看监听端口：netstat -lntp
6.安装 Containerd
6.1 内核参数调整
如果是安装 Docker 会自动配置以下的内核参数，而无需手动实现
但是如果安装Contanerd，还需手动配置
允许 iptables 检查桥接流量,若要显式加载此模块，需运行 modprobe br_netfilter
为了让 Linux 节点的 iptables 能够正确查看桥接流量，还需要确认net.bridge.bridge-nf-call-iptables 设置为 1。
配置Containerd所需的模块：
[root@k8s-master01 ~]# cat <<EOF | sudo tee etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
加载模块：
[root@k8s-master01 ~]# modprobe -- overlay
[root@k8s-master01 ~]# modprobe -- br_netfilter
配置Containerd所需的内核：
[root@k8s-master01 ~]# cat <<EOF | sudo tee etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
加载内核：
[root@k8s-master01 ~]# sysctl --system6.2 二进制安装 Containerd
官方下载链接：
https://github.com/containerd/containerdContainerd有三种二进制安装包:
containerd-xxx ：不包含runC，需要单独安装runC
[root@k8s-master01 ~]# tar tf containerd-1.6.8-linux-amd64.tar.gz
bin/
bin/containerd-stress
bin/containerd-shim-runc-v2
bin/containerd-shim
bin/ctr
bin/containerd
bin/containerd-shim-runc-v1cri-containerd-xxx：包含runC，ctr、crictl、systemd 配置文件等相关文件，不包含cni插件，k8s不需要containerd的cni插件，所以选择这个二进制包安装
[root@k8s-master01 ~]# tar tf cri-containerd-1.6.8-linux-amd64.tar.gz
etc/crictl.yaml
etc/systemd/
etc/systemd/system/
etc/systemd/system/containerd.service
usr/
usr/local/
usr/local/sbin/
usr/local/sbin/runc
usr/local/bin/
usr/local/bin/containerd-stress
usr/local/bin/containerd-shim-runc-v2
usr/local/bin/containerd-shim
usr/local/bin/ctr
usr/local/bin/containerd
usr/local/bin/critest
usr/local/bin/ctd-decoder
usr/local/bin/crictl
usr/local/bin/containerd-shim-runc-v1
opt/containerd/
opt/containerd/cluster/
opt/containerd/cluster/gce/
opt/containerd/cluster/gce/env
opt/containerd/cluster/gce/cloud-init/
opt/containerd/cluster/gce/cloud-init/master.yaml
opt/containerd/cluster/gce/cloud-init/node.yaml
opt/containerd/cluster/gce/cni.template
opt/containerd/cluster/gce/configure.sh
opt/containerd/cluster/versioncri-containerd-cni-xxx：包含runc、ctr、crictl、cni插件、systemd 配置文件等相关文件
[root@k8s-master01 ~]# tar tf cri-containerd-cni-1.6.8-linux-amd64.tar.gz
etc/
etc/crictl.yaml
etc/systemd/
etc/systemd/system/
etc/systemd/system/containerd.service
etc/cni/
etc/cni/net.d/
etc/cni/net.d/10-containerd-net.conflist
usr/
usr/local/
usr/local/sbin/
usr/local/sbin/runc
usr/local/bin/
usr/local/bin/containerd-stress
usr/local/bin/containerd-shim-runc-v2
usr/local/bin/containerd-shim
usr/local/bin/ctr
usr/local/bin/containerd
usr/local/bin/critest
usr/local/bin/ctd-decoder
usr/local/bin/crictl
usr/local/bin/containerd-shim-runc-v1
opt/
opt/containerd/
opt/containerd/cluster/
opt/containerd/cluster/gce/
opt/containerd/cluster/gce/env
opt/containerd/cluster/gce/cloud-init/
opt/containerd/cluster/gce/cloud-init/master.yaml
opt/containerd/cluster/gce/cloud-init/node.yaml
opt/containerd/cluster/gce/cni.template
opt/containerd/cluster/gce/configure.sh
opt/containerd/cluster/version
opt/cni/
opt/cni/bin/
opt/cni/bin/bandwidth
opt/cni/bin/loopback
opt/cni/bin/ipvlan
opt/cni/bin/host-local
opt/cni/bin/static
opt/cni/bin/vlan
opt/cni/bin/tuning
opt/cni/bin/host-device
opt/cni/bin/firewall
opt/cni/bin/portmap
opt/cni/bin/sbr
opt/cni/bin/macvlan
opt/cni/bin/bridge
opt/cni/bin/dhcp
opt/cni/bin/ptp
opt/cni/bin/vrf
安装Containerd：
[root@k8s-master01 ~]# wget https://github.com/containerd/containerd/releases/download/v1.6.8/cri-containerd-1.6.8-linux-amd64.tar.gz
#cri-containerd-1.6.8-linux-amd64.tar.gz 压缩包中已经按照官方二进制部署推荐的目录结构布局好。 里面包含了 systemd 配置文件，containerd 和ctr、crictl等部署文件。 将解压缩到系统的根目录 中:
[root@k8s-master01 ~]# tar xf cri-containerd-1.6.8-linux-amd64.tar.gz -C
配置Containerd的配置文件：
[root@k8s-master01 ~]# mkdir -p etc/containerd
[root@k8s-master01 ~]# containerd config default | tee etc/containerd/config.toml
将Containerd的Cgroup改为Systemd和修改containerd配置sandbox_image 镜像源设置为阿里google_containers镜像源：
[root@k8s-master01 ~]# vim etc/containerd/config.toml
...
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
...
SystemdCgroup = true #SystemdCgroup改成true
...
sandbox_image = "harbor.raymonds.cc/google_containers/pause:3.8" #sandbox_image的镜像改为私有仓库“harbor.raymonds.cc/google_containers/pause:3.8”，如果没有私有仓库改为阿里镜像源“registry.aliyuncs.com/google_containers/pause:3.8”
#使用下面命令修改
sed -ri -e 's/(.*SystemdCgroup = ).*/\1true/' -e 's@(.*sandbox_image = ).*@\1\"harbor.raymonds.cc/google_containers/pause:3.8\"@' etc/containerd/config.toml
#如果没有harbor，请执行下面命令
sed -ri -e 's/(.*SystemdCgroup = ).*/\1true/' -e 's@(.*sandbox_image = ).*@\1\"registry.aliyuncs.com/google_containers/pause:3.8\"@' etc/containerd/config.toml
配置镜像加速和配置私有镜像仓库：
参考文档：https://github.com/containerd/cri/blob/master/docs/registry.md
[root@k8s-master01 ~]# vim etc/containerd/config.toml
...
[plugins."io.containerd.grpc.v1.cri".registry]
...
#下面几行是配置私有仓库授权，如果没有私有仓库下面的不用设置
[plugins."io.containerd.grpc.v1.cri".registry.configs]
[plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.raymonds.cc".tls]
insecure_skip_verify = true
[plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.raymonds.cc".auth]
username = "admin"
password = "123456"
...
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
#下面两行是配置镜像加速
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint = ["https://registry.docker-cn.com" ,"http://hub-mirror.c.163.com" ,"https://docker.mirrors.ustc.edu.cn"]
#下面两行是配置私有仓库，如果没有私有仓库下面的不用设置
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."harbor.raymonds.cc"]
endpoint = ["http://harbor.raymonds.cc"]
...
#使用下面命令修改
sed -i -e '/.*registry.mirrors.*/a\ [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]\n endpoint = ["https://registry.docker-cn.com" ,"http://hub-mirror.c.163.com" ,"https://docker.mirrors.ustc.edu.cn"]\n [plugins."io.containerd.grpc.v1.cri".registry.mirrors."harbor.raymonds.cc"]\n endpoint = ["http://harbor.raymonds.cc"]' -e '/.*registry.configs.*/a\ [plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.raymonds.cc".tls]\n insecure_skip_verify = true\n [plugins."io.containerd.grpc.v1.cri".registry.configs."harbor.raymonds.cc".auth]\n username = "admin"\n password = "123456"' etc/containerd/config.toml
#如果没有harbor不需要设置私有仓库相关配置，只需要设置镜像加速，请使用下面命令执行
sed -i '/.*registry.mirrors.*/a\ [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]\n endpoint = ["https://registry.docker-cn.com" ,"http://hub-mirror.c.163.com" ,"https://docker.mirrors.ustc.edu.cn"]' etc/containerd/config.toml
配置crictl客户端连接的运行时位置：
[root@k8s-master01 ~]# cat > etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
启动Containerd，并配置开机自启动：
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now containerd查看信息：
[root@k8s-master01 ~]# ctr version
Client:
Version: v1.6.8
Revision: 9cd3357b7fd7218e4aec3eae239db1f68a5a6ec6
Go version: go1.17.13
Server:
Version: v1.6.8
Revision: 9cd3357b7fd7218e4aec3eae239db1f68a5a6ec6
UUID: 18d9c9c1-27cc-4883-be10-baf17a186aad
[root@k8s-master01 ~]# crictl version
Version: 0.1.0
RuntimeName: containerd
RuntimeVersion: v1.6.8
RuntimeApiVersion: v1
[root@k8s-master01 ~]# crictl info
...
},
...
"lastCNILoadStatus": "cni config load failed: no network config found in etc/cni/net.d: cni plugin not initialized: failed to load cni config",
"lastCNILoadStatus.default": "cni config load failed: no network config found in etc/cni/net.d: cni plugin not initialized: failed to load cni config"
}
#这里cni插件报错，不用管，因为没有装containerd的CNI插件，kubernetes里不需要containerd的CNI插件，装上了还会冲突，后边安装flannel或calico的CNI插件
6.3 containerd 客户端工具 nerdctl
推荐使用 nerdctl，使用效果与 docker 命令的语法一致，github 下载链接：
https://github.com/containerd/nerdctl/releases
精简 (nerdctl--linux-amd64.tar.gz): 只包含 nerdctl
完整 (nerdctl-full--linux-amd64.tar.gz): 包含 containerd, runc, and CNI 等依赖
nerdctl
的目标并不是单纯地复制 docker 的功能，它还实现了很多 docker 不具备的功能，例如延迟拉取镜像（lazy-pulling）、镜像加密（imgcrypt）等。具体看 nerdctl。
延迟拉取镜像功能可以参考这篇文章：Containerd 使用 Stargz Snapshotter 延迟拉取镜像
https://icloudnative.io/posts/startup-containers-in-lightning-speed-with-lazy-image-distribution-on-containerd/
1）安装 nerdctl（精简版）：
[root@k8s-master01 ~]# wget https://github.com/containerd/nerdctl/releases/download/v0.23.0/nerdctl-0.23.0-linux-amd64.tar.gz
[root@k8s-master01 ~]# tar xf nerdctl-0.23.0-linux-amd64.tar.gz -C usr/local/bin/
#配置nerdctl
[root@k8s-master01 ~]# mkdir -p etc/nerdctl/
[root@k8s-master01 ~]# cat > etc/nerdctl/nerdctl.toml <<EOF
namespace = "k8s.io" #设置nerdctl工具默认namespace
insecure_registry = true #跳过安全镜像仓库检测
EOF
2）安装 buildkit 支持构建镜像：
buildkit GitHub 地址：
https://github.com/moby/buildkit
使用精简版 nerdctl 无法直接通过 containerd 构建镜像，需要与 buildkit 组全使用以实现镜像构建。当然你也可以安装上面的完整 nerdctl；buildkit 项目是 Docker 公司开源出来的一个构建工具包，支持 OCI 标准的镜像构建。它主要包含以下部分:
服务端 buildkitd，当前支持 runc 和 containerd 作为 worker，默认是 runc；
客户端 buildctl，负责解析 Dockerfile，并向服务端 buildkitd 发出构建请求。
buildkit 是典型的C/S 架构，client 和 server 可以不在一台服务器上。而 nerdctl 在构建镜像方面也可以作为 buildkitd 的客户端。
[root@k8s-master01 ~]# wget https://github.com/moby/buildkit/releases/download/v0.10.4/buildkit-v0.10.4.linux-amd64.tar.gz
[root@k8s-master01 ~]# tar xf buildkit-v0.10.4.linux-amd64.tar.gz -C usr/local/
配置 buildkit 的启动文件，可以从这里下载：
https://github.com/moby/buildkit/tree/master/examples/systemd
buildkit 需要配置两个文件
/usr/lib/systemd/system/buildkit.socket
[root@k8s-master01 ~]# cat > usr/lib/systemd/system/buildkit.socket <<EOF
[Unit]
Description=BuildKit
Documentation=https://github.com/moby/buildkit
[Socket]
ListenStream=%t/buildkit/buildkitd.sock
SocketMode=0660
[Install]
WantedBy=sockets.target
EOF
/usr/lib/systemd/system/buildkit.service
[root@k8s-master01 ~]# cat > usr/lib/systemd/system/buildkit.service << EOF
[Unit]
Description=BuildKit
Requires=buildkit.socket
After=buildkit.socket
Documentation=https://github.com/moby/buildkit
[Service]
Type=notify
ExecStart=/usr/local/bin/buildkitd --addr fd://
[Install]
WantedBy=multi-user.target
EOF
启动 buildkit：
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now buildkit
root@k8s-master01:~# systemctl status buildkit
● buildkit.service - BuildKit
Loaded: loaded (/lib/systemd/system/buildkit.service; enabled; vendor preset: enabled)
Active: active (running) since Tue 2022-09-13 16:47:14 CST; 21s ago
TriggeredBy: ● buildkit.socket
Docs: https://github.com/moby/buildkit
Main PID: 3303 (buildkitd)
Tasks: 7 (limit: 4575)
Memory: 14.5M
CGroup: system.slice/buildkit.service
└─3303 usr/local/bin/buildkitd --addr fd://
Sep 13 16:47:14 k8s-master01.example.local systemd[1]: Started BuildKit.
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=info msg="auto snapshotter: using overlayfs"
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=warning msg="using host network as the defa>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=info msg="found worker \"sgqr1t2c81tj7ec7w3>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=warning msg="using host network as the defa>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=info msg="found worker \"w4fzprdjtuqtj3f3wd>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=info msg="found 2 workers, default=\"sgqr1t>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=warning msg="currently, only the default wo>
Sep 13 16:47:14 k8s-master01.example.local buildkitd[3303]: time="2022-09-13T16:47:14+08:00" level=info msg="running server on run/buildkit/b>
[root@k8s-master01 ~]# nerdctl version
Client:
Version:v0.23.0
OS/Arch:linux/amd64
Git commit:660680b7ddfde1d38a66ec1c7f08f8d89ab92c68
buildctl:
Version:v0.10.4
GitCommit:a2ba6869363812a210fcc3ded6926757ab780b5f
Server:
containerd:
Version:v1.6.8
GitCommit:9cd3357b7fd7218e4aec3eae239db1f68a5a6ec6
runc:
Version: 1.1.3
GitCommit:v1.1.3-0-g6724737f
[root@k8s-master01 ~]# buildctl --version
buildctl github.com/moby/buildkit v0.10.4 a2ba6869363812a210fcc3ded6926757ab780b5f
[root@k8s-master01 ~]# nerdctl info
Client:
Namespace:default
Debug Mode: false
Server:
Server Version: v1.6.8
Storage Driver: overlayfs
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 1
Plugins:
Log: fluentd journald json-file
Storage: aufs native overlayfs
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 5.4.0-107-generic
Operating System: Ubuntu 20.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.81GiB
Name: k8s-master01.example.local
ID: ab901e55-fa37-496e-9920-ee6eff687687
WARNING: No swap limit support #系统警告信息 (没有开启 swap 资源限制 )
解决上述SWAP报警提示：
#SWAP报警提示，只有在ubuntu系统有，centos系统里没有不用设置
root@k8s-master01:~# sed -ri '/^GRUB_CMDLINE_LINUX=/s@"$@ swapaccount=1"@' etc/default/grub
root@k8s-master01:~# update-grub
root@k8s-master01:~# reboot
root@k8s-master01:~# nerdctl info
Client:
Namespace:default
Debug Mode: false
Server:
Server Version: v1.6.8
Storage Driver: overlayfs
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 1
Plugins:
Log: fluentd journald json-file
Storage: aufs native overlayfs
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 5.4.0-125-generic
Operating System: Ubuntu 20.04.4 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 3.81GiB
Name: k8s-master01.example.local
ID: ab901e55-fa37-496e-9920-ee6eff687687
#现在就没有SWAP报警提示
nerdctl命令补全：
#CentOS
[root@k8s-master01 ~]# yum -y install bash-completion
#Ubuntu
[root@k8s-master01 ~]# apt -y install bash-completion
[root@k8s-master01 ~]# echo "source <(nerdctl completion bash)" >> ~/.bashrc
master02、master03和node安装containerd：
[root@k8s-master02 ~]# cat install_containerd_binary.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-09-13
#FileName: install_containerd_binary.sh
#URL: raymond.blog.csdn.net
#Description: install_containerd_binary for centos 7/8 & ubuntu 18.04/20.04 & Rocky 8
#Copyright (C): 2022 All rights reserved
#*********************************************************************************************
SRC_DIR=/usr/local/src
COLOR="echo -e \\033[01;31m"
END='\033[0m'
#Containerd下载地址：https://github.com/containerd/containerd/releases/download/v1.6.8/cri-containerd-1.6.8-linux-amd64.tar.gz
CONTAINERD_FILE=cri-containerd-1.6.8-linux-amd64.tar.gz
PAUSE_VERSION=3.8
HARBOR_DOMAIN=harbor.raymonds.cc
USERNAME=admin
PASSWORD=123456
#Netdctl下载地址：https://github.com/containerd/nerdctl/releases/download/v0.23.0/nerdctl-0.23.0-linux-amd64.tar.gz
NETDCTL_FILE=nerdctl-0.23.0-linux-amd64.tar.gz
#Buildkit下载地址：https://github.com/moby/buildkit/releases/download/v0.10.4/buildkit-v0.10.4.linux-amd64.tar.gz
BUILDKIT_FILE=buildkit-v0.10.4.linux-amd64.tar.gz
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
if [ ! -e ${CONTAINERD_FILE} ];then
${COLOR}"缺少${CONTAINERD_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${NETDCTL_FILE} ];then
${COLOR}"缺少${NETDCTL_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
elif [ ! -e ${BUILDKIT_FILE} ];then
${COLOR}"缺少${BUILDKIT_FILE}文件,请把文件放到${SRC_DIR}目录下"${END}
exit
else
${COLOR}"相关文件已准备好"${END}
fi
}
install_containerd(){
[ -f usr/local/bin/containerd ] && { ${COLOR}"Containerd已存在，安装失败"${END};exit; }
cat > etc/modules-load.d/containerd.conf <<-EOF
overlay
br_netfilter
EOF
modprobe -- overlay
modprobe -- br_netfilter
cat > etc/sysctl.d/99-kubernetes-cri.conf <<-EOF
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
sysctl --system &> dev/null
${COLOR}"开始安装Containerd..."${END}
tar xf ${CONTAINERD_FILE} -C
mkdir -p etc/containerd
containerd config default | tee etc/containerd/config.toml &> dev/null
sed -ri -e 's/(.*SystemdCgroup = ).*/\1true/' -e 's@(.*sandbox_image = ).*@\1\"'''${HARBOR_DOMAIN}'''/google_containers/pause:'''${PAUSE_VERSION}'''\"@' -e '/.*registry.mirrors.*/a\ [plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]\n endpoint = ["https://registry.docker-cn.com" ,"http://hub-mirror.c.163.com" ,"https://docker.mirrors.ustc.edu.cn"]\n [plugins."io.containerd.grpc.v1.cri".registry.mirrors."'''${HARBOR_DOMAIN}'''"]\n endpoint = ["http://'''${HARBOR_DOMAIN}'''"]' -e '/.*registry.configs.*/a\ [plugins."io.containerd.grpc.v1.cri".registry.configs."'''${HARBOR_DOMAIN}'''".tls]\n insecure_skip_verify = true\n [plugins."io.containerd.grpc.v1.cri".registry.configs."'''${HARBOR_DOMAIN}'''".auth]\n username = "'''${USERNAME}'''"\n password = "'''${PASSWORD}'''"' etc/containerd/config.toml
cat > etc/crictl.yaml <<-EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
systemctl daemon-reload && systemctl enable --now containerd &> dev/null
systemctl is-active containerd &> dev/null && ${COLOR}"Containerd 服务启动成功"${END} || { ${COLOR}"Containerd 启动失败"${END};exit; }
ctr version && ${COLOR}"Containerd 安装成功"${END} || ${COLOR}"Containerd 安装失败"${END}
}
set_alias(){
echo 'alias rmi="nerdctl images -qa|xargs nerdctl rmi -f"' >> ~/.bashrc
echo 'alias rmc="nerdctl ps -qa|xargs nerdctl rm -f"' >> ~/.bashrc
}
install_netdctl_buildkit(){
${COLOR}"开始安装Netdctl..."${END}
tar xf ${NETDCTL_FILE} -C usr/local/bin/
mkdir -p etc/nerdctl/
cat > etc/nerdctl/nerdctl.toml <<-EOF
namespace = "k8s.io"
insecure_registry = true
EOF
${COLOR}"开始安装Buildkit..."${END}
tar xf ${BUILDKIT_FILE} -C usr/local/
cat > usr/lib/systemd/system/buildkit.socket <<-EOF
[Unit]
Description=BuildKit
Documentation=https://github.com/moby/buildkit
[Socket]
ListenStream=%t/buildkit/buildkitd.sock
SocketMode=0660
[Install]
WantedBy=sockets.target
EOF
cat > usr/lib/systemd/system/buildkit.service <<-EOF
[Unit]
Description=BuildKit
Requires=buildkit.socket
After=buildkit.socket
Documentation=https://github.com/moby/buildkit
[Service]
Type=notify
ExecStart=/usr/local/bin/buildkitd --addr fd://
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload && systemctl enable --now buildkit &> dev/null
systemctl is-active buildkit &> dev/null && ${COLOR}"Buildkit 服务启动成功"${END} || { ${COLOR}"Buildkit 启动失败"${END};exit; }
buildctl --version && ${COLOR}"Buildkit 安装成功"${END} || ${COLOR}"Buildkit 安装失败"${END}
}
nerdctl_command_completion(){
if [ ${OS_ID} == "CentOS" -o ${OS_ID} == "Rocky" ];then
yum -y install bash-completion
else
apt -y install bash-completion
fi
echo "source <(nerdctl completion bash)" >> ~/.bashrc
. ~/.bashrc
}
set_swap_limit(){
if [ ${OS_ID} == "Ubuntu" ];then
${COLOR}'设置Docker的"WARNING: No swap limit support"警告'${END}
sed -ri '/^GRUB_CMDLINE_LINUX=/s@"$@ swapaccount=1"@' etc/default/grub
update-grub &> dev/null
${COLOR}"10秒后，机器会自动重启"${END}
sleep 10
reboot
fi
}
main(){
os
check_file
install_containerd
set_alias
install_netdctl_buildkit
nerdctl_command_completion
set_swap_limit
}
main
[root@k8s-master02 ~]# bash install_containerd_binary.sh
[root@k8s-master03 ~]# bash install_containerd_binary.sh
[root@k8s-node01 ~]# bash install_containerd_binary.sh
[root@k8s-node02 ~]# bash install_containerd_binary.sh
[root@k8s-node03 ~]# bash install_containerd_binary.sh
7.部署master
7.1 创建etcd相关目录和复制etcd证书
master节点创建etcd证书目录
[root@k8s-master01 ~]# mkdir etc/etcd/ssl -p
[root@k8s-master02 ~]# mkdir etc/etcd/ssl -p
[root@k8s-master03 ~]# mkdir etc/etcd/ssl -p
将etcd证书复制到master节点
[root@k8s-etcd01 pki]# for NODE in k8s-master01 k8s-master02 k8s-master03; do
ssh -o StrictHostKeyChecking=no $NODE "mkdir -p etc/etcd/ssl"
for FILE in etcd-ca-key.pem etcd-ca.pem etcd-key.pem etcd.pem; do
scp -o StrictHostKeyChecking=no etc/etcd/ssl/${FILE} $NODE:/etc/etcd/ssl/${FILE}
done
done
所有master节点创建etcd的证书目录
[root@k8s-master01 ~]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-master02 ~]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-master03 ~]# mkdir etc/kubernetes/pki/etcd -p
[root@k8s-master01 ~]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
[root@k8s-master02 ~]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
[root@k8s-master03 ~]# ln -s etc/etcd/ssl/* etc/kubernetes/pki/etcd/
7.2 安装kubernetes组件
需要下载最新的1.25.x版本：
https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.25.md
打开页面后点击：
下载kubernetes安装包
[root@k8s-master01 ~]# wget https://dl.k8s.io/v1.25.2/kubernetes-server-linux-amd64.tar.gz解压kubernetes安装文件
[root@k8s-master01 ~]# tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}版本查看
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.25.2
将组件发送到其他master节点
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do echo $NODE; scp -o StrictHostKeyChecking=no usr/local/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy} $NODE:/usr/local/bin/; donemaster节点创建/opt/cni/bin目录
[root@k8s-master01 ~]# mkdir -p opt/cni/bin
[root@k8s-master02 ~]# mkdir -p opt/cni/bin
[root@k8s-master03 ~]# mkdir -p opt/cni/bin
7.3 生成k8s组件证书
二进制安装最关键步骤，一步错误全盘皆输，一定要注意每个步骤都要是正确的
master节点创建kubernetes相关目录
[root@k8s-master01 ~]# mkdir -p etc/kubernetes/pki
[root@k8s-master02 ~]# mkdir -p etc/kubernetes/pki
[root@k8s-master03 ~]# mkdir -p etc/kubernetes/pki
master01下载生成证书工具
[root@k8s-master01 ~]# wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
[root@k8s-master01 ~]# wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
[root@k8s-master01 ~]# mv cfssl_1.6.1_linux_amd64 usr/local/bin/cfssl
[root@k8s-master01 ~]# mv cfssljson_1.6.1_linux_amd64 usr/local/bin/cfssljson
[root@k8s-master01 ~]# chmod +x usr/local/bin/cfssl usr/local/bin/cfssljson
7.3.1 生成ca证书
[root@k8s-master01 ~]# mkdir pki
[root@k8s-master01 ~]# cd pki/
[root@k8s-master01 pki]# cat > ca-csr.json <<EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
[root@k8s-master01 pki]# cfssl gencert -initca ca-csr.json | cfssljson -bare etc/kubernetes/pki/ca
#执行结果
2022/09/25 16:39:54 [INFO] generating a new CA key and certificate from CSR
2022/09/25 16:39:54 [INFO] generate received request
2022/09/25 16:39:54 [INFO] received CSR
2022/09/25 16:39:54 [INFO] generating key: rsa-2048
2022/09/25 16:39:54 [INFO] encoded CSR
2022/09/25 16:39:54 [INFO] signed certificate with serial number 144467388419643602118985040994832054816132660567
[root@k8s-master01 pki]# ll etc/kubernetes/pki/ca*
-rw-r--r-- 1 root root 1070 Sep 25 16:39 etc/kubernetes/pki/ca.csr
-rw------- 1 root root 1679 Sep 25 16:39 etc/kubernetes/pki/ca-key.pem
-rw-r--r-- 1 root root 1363 Sep 25 16:39 etc/kubernetes/pki/ca.pem
7.3.2 生成apiserver证书
# 10.96.0.是k8s service的网段，如果说需要更改k8s service网段，那就需要更改10.96.0.1，
# 如果不是高可用集群，172.31.3.188为Master01的IP
[root@k8s-master01 pki]# cat > ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
[root@k8s-master01 pki]# cat > apiserver-csr.json <<EOF
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -hostname=10.96.0.1,172.31.3.188,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,172.31.3.101,172.31.3.102,172.31.3.103 -profile=kubernetes apiserver-csr.json | cfssljson -bare etc/kubernetes/pki/apiserver
#执行结果
2022/09/25 16:40:41 [INFO] generate received request
2022/09/25 16:40:41 [INFO] received CSR
2022/09/25 16:40:41 [INFO] generating key: rsa-2048
2022/09/25 16:40:41 [INFO] encoded CSR
2022/09/25 16:40:41 [INFO] signed certificate with serial number 430981208956747841835012330139928202432283184832
[root@k8s-master01 pki]# ll etc/kubernetes/pki/apiserver*
-rw-r--r-- 1 root root 1297 Sep 25 16:40 etc/kubernetes/pki/apiserver.csr
-rw------- 1 root root 1675 Sep 25 16:40 etc/kubernetes/pki/apiserver-key.pem
-rw-r--r-- 1 root root 1692 Sep 25 16:40 etc/kubernetes/pki/apiserver.pem
7.3.3 生成apiserver的聚合证书
生成apiserver的聚合证书。Requestheader-client-xxx requestheader-allowwd-xxx:aggerator
[root@k8s-master01 pki]# cat > front-proxy-ca-csr.json <<EOF
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
[root@k8s-master01 pki]# cfssl gencert -initca front-proxy-ca-csr.json | cfssljson -bare etc/kubernetes/pki/front-proxy-ca
#执行结果
2022/09/25 16:41:21 [INFO] generating a new CA key and certificate from CSR
2022/09/25 16:41:21 [INFO] generate received request
2022/09/25 16:41:21 [INFO] received CSR
2022/09/25 16:41:21 [INFO] generating key: rsa-2048
2022/09/25 16:41:22 [INFO] encoded CSR
2022/09/25 16:41:22 [INFO] signed certificate with serial number 673709205875970548123940386290897802924816968201
[root@k8s-master01 pki]# ll etc/kubernetes/pki/front-proxy-ca*
-rw-r--r-- 1 root root 891 Sep 25 16:41 etc/kubernetes/pki/front-proxy-ca.csr
-rw------- 1 root root 1679 Sep 25 16:41 etc/kubernetes/pki/front-proxy-ca-key.pem
-rw-r--r-- 1 root root 1094 Sep 25 16:41 etc/kubernetes/pki/front-proxy-ca.pem
[root@k8s-master01 pki]# cat > front-proxy-client-csr.json <<EOF
{
"CN": "front-proxy-client",
"key": {
"algo": "rsa",
"size": 2048
}
}
EOF
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/front-proxy-ca.pem -ca-key=/etc/kubernetes/pki/front-proxy-ca-key.pem -config=ca-config.json -profile=kubernetes front-proxy-client-csr.json | cfssljson -bare etc/kubernetes/pki/front-proxy-client
#返回结果（忽略警告）
2022/09/25 16:42:01 [INFO] generate received request
2022/09/25 16:42:01 [INFO] received CSR
2022/09/25 16:42:01 [INFO] generating key: rsa-2048
2022/09/25 16:42:01 [INFO] encoded CSR
2022/09/25 16:42:01 [INFO] signed certificate with serial number 85560094871910737940366819468847340063056850525
2022/09/25 16:42:01 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# ll etc/kubernetes/pki/front-proxy-client*
-rw-r--r-- 1 root root 903 Sep 25 16:42 etc/kubernetes/pki/front-proxy-client.csr
-rw------- 1 root root 1675 Sep 25 16:42 etc/kubernetes/pki/front-proxy-client-key.pem
-rw-r--r-- 1 root root 1188 Sep 25 16:42 etc/kubernetes/pki/front-proxy-client.pem
7.3.4 生成controller-manage的证书和配置文件
[root@k8s-master01 pki]# cat > manager-csr.json <<EOF
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
[root@k8s-master01 pki]# cfssl gencert -ca=/etc/kubernetes/pki/ca.pem -ca-key=/etc/kubernetes/pki/ca-key.pem -config=ca-config.json -profile=kubernetes manager-csr.json | cfssljson -bare etc/kubernetes/pki/controller-manager
#执行结果
2022/09/25 16:42:37 [INFO] generate received request
2022/09/25 16:42:37 [INFO] received CSR
2022/09/25 16:42:37 [INFO] generating key: rsa-2048
2022/09/25 16:42:37 [INFO] encoded CSR
2022/09/25 16:42:37 [INFO] signed certificate with serial number 730142395596434023542887289901373515374508177240
2022/09/25 16:42:37 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# ll etc/kubernetes/pki/controller-manager*
-rw-r--r-- 1 root root 1082 Sep 25 16:42 etc/kubernetes/pki/controller-manager.csr
-rw------- 1 root root 1675 Sep 25 16:42 etc/kubernetes/pki/controller-manager-key.pem
-rw-r--r-- 1 root root 1501 Sep 25 16:42 etc/kubernetes/pki/controller-manager.pem
# 注意，如果不是高可用集群，172.31.3.188:6443改为master01的地址
# set-cluster：设置一个集群项，
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://172.31.3.188:6443 --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
#执行结果
Cluster "kubernetes" set.
# set-credentials 设置一个用户项
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-controller-manager --client-certificate=/etc/kubernetes/pki/controller-manager.pem --client-key=/etc/kubernetes/pki/controller-manager-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
#执行结果
User "system:kube-controller-manager" set.
# 设置一个环境项，一个上下文
[root@k8s-master01 pki]# kubectl config set-context system:kube-controller-manager@kubernetes --cluster=kubernetes --user=system:kube-controller-manager --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
#执行结果
Context "system:kube-controller-manager@kubernetes" created.
# 使用某个环境当做默认环境
[root@k8s-master01 pki]# kubectl config use-context system:kube-controller-manager@kubernetes --kubeconfig=/etc/kubernetes/controller-manager.kubeconfig
#执行结果
Switched to context "system:kube-controller-manager@kubernetes".
7.3.5 生成scheduler的证书和配置文件
[root@k8s-master01 pki]# cat > scheduler-csr.json <<EOF
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
scheduler-csr.json | cfssljson -bare etc/kubernetes/pki/scheduler
#执行结果
2022/09/25 16:48:53 [INFO] generate received request
2022/09/25 16:48:53 [INFO] received CSR
2022/09/25 16:48:53 [INFO] generating key: rsa-2048
2022/09/25 16:48:53 [INFO] encoded CSR
2022/09/25 16:48:53 [INFO] signed certificate with serial number 228881838573494475296244558577950441626719203074
2022/09/25 16:48:53 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# ll etc/kubernetes/pki/scheduler*
-rw-r--r-- 1 root root 1058 Sep 25 16:48 etc/kubernetes/pki/scheduler.csr
-rw------- 1 root root 1679 Sep 25 16:48 etc/kubernetes/pki/scheduler-key.pem
-rw-r--r-- 1 root root 1476 Sep 25 16:48 etc/kubernetes/pki/scheduler.pem
# 注意，如果不是高可用集群，172.31.3.188:6443改为master01的地址
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes \
--certificate-authority=/etc/kubernetes/pki/ca.pem \
--embed-certs=true \
--server=https://172.31.3.188:6443 \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
#执行结果
Cluster "kubernetes" set.
[root@k8s-master01 pki]# kubectl config set-credentials system:kube-scheduler \
--client-certificate=/etc/kubernetes/pki/scheduler.pem \
--client-key=/etc/kubernetes/pki/scheduler-key.pem \
--embed-certs=true \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
#执行结果
User "system:kube-scheduler" set.
[root@k8s-master01 pki]# kubectl config set-context system:kube-scheduler@kubernetes \
--cluster=kubernetes \
--user=system:kube-scheduler \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
#执行结果
Context "system:kube-scheduler@kubernetes" created.
[root@k8s-master01 pki]# kubectl config use-context system:kube-scheduler@kubernetes \
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
#执行结果
Switched to context "system:kube-scheduler@kubernetes".
7.3.6 生成admin证书和配置文件
[root@k8s-master01 pki]# cat > admin-csr.json <<EOF
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
[root@k8s-master01 pki]# cfssl gencert \
-ca=/etc/kubernetes/pki/ca.pem \
-ca-key=/etc/kubernetes/pki/ca-key.pem \
-config=ca-config.json \
-profile=kubernetes \
admin-csr.json | cfssljson -bare etc/kubernetes/pki/admin
#执行结果
2022/09/25 16:50:04 [INFO] generate received request
2022/09/25 16:50:04 [INFO] received CSR
2022/09/25 16:50:04 [INFO] generating key: rsa-2048
2022/09/25 16:50:04 [INFO] encoded CSR
2022/09/25 16:50:04 [INFO] signed certificate with serial number 42182691318354263130529298881094841114488241757
2022/09/25 16:50:04 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@k8s-master01 pki]# ll etc/kubernetes/pki/admin*
-rw-r--r-- 1 root root 1025 Sep 25 16:50 etc/kubernetes/pki/admin.csr
-rw------- 1 root root 1675 Sep 25 16:50 etc/kubernetes/pki/admin-key.pem
-rw-r--r-- 1 root root 1444 Sep 25 16:50 etc/kubernetes/pki/admin.pem
# 注意，如果不是高可用集群，172.31.3.188:8443改为master01的地址
[root@k8s-master01 pki]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://172.31.3.188:6443 --kubeconfig=/etc/kubernetes/admin.kubeconfig
#执行结果
Cluster "kubernetes" set.
[root@k8s-master01 pki]# kubectl config set-credentials kubernetes-admin --client-certificate=/etc/kubernetes/pki/admin.pem --client-key=/etc/kubernetes/pki/admin-key.pem --embed-certs=true --kubeconfig=/etc/kubernetes/admin.kubeconfig
#执行结果
User "kubernetes-admin" set.
[root@k8s-master01 pki]# kubectl config set-context kubernetes-admin@kubernetes --cluster=kubernetes --user=kubernetes-admin --kubeconfig=/etc/kubernetes/admin.kubeconfig
#执行结果
Context "kubernetes-admin@kubernetes" created.
[root@k8s-master01 pki]# kubectl config use-context kubernetes-admin@kubernetes --kubeconfig=/etc/kubernetes/admin.kubeconfig
#执行结果
Switched to context "kubernetes-admin@kubernetes".
7.3.7 创建sa key
创建ServiceAccount Key à secret
[root@k8s-master01 pki]# openssl genrsa -out etc/kubernetes/pki/sa.key 2048
#返回结果
Generating RSA private key, 2048 bit long modulus
..............................+++
....................................+++
e is 65537 (0x10001)
[root@k8s-master01 pki]# openssl rsa -in etc/kubernetes/pki/sa.key -pubout -out etc/kubernetes/pki/sa.pub
#执行结果
writing RSA key
[root@k8s-master01 pki]# ll etc/kubernetes/pki/sa*
-rw------- 1 root root 1679 Sep 25 16:51 etc/kubernetes/pki/sa.key
-rw-r--r-- 1 root root 451 Sep 25 16:51 etc/kubernetes/pki/sa.pub
发送证书至其他master节点
[root@k8s-master01 pki]# for NODE in k8s-master02 k8s-master03; do
for FILE in $(ls etc/kubernetes/pki | grep -v etcd); do
scp etc/kubernetes/pki/${FILE} $NODE:/etc/kubernetes/pki/${FILE};
done;
for FILE in admin.kubeconfig controller-manager.kubeconfig scheduler.kubeconfig; do
scp etc/kubernetes/${FILE} $NODE:/etc/kubernetes/${FILE};
done;
done
查看证书文件
[root@k8s-master01 pki]# ll -R etc/kubernetes/pki/
/etc/kubernetes/pki/:
total 92
-rw-r--r-- 1 root root 1025 Sep 25 16:50 admin.csr
-rw------- 1 root root 1675 Sep 25 16:50 admin-key.pem
-rw-r--r-- 1 root root 1444 Sep 25 16:50 admin.pem
-rw-r--r-- 1 root root 1297 Sep 25 16:40 apiserver.csr
-rw------- 1 root root 1675 Sep 25 16:40 apiserver-key.pem
-rw-r--r-- 1 root root 1692 Sep 25 16:40 apiserver.pem
-rw-r--r-- 1 root root 1070 Sep 25 16:39 ca.csr
-rw------- 1 root root 1679 Sep 25 16:39 ca-key.pem
-rw-r--r-- 1 root root 1363 Sep 25 16:39 ca.pem
-rw-r--r-- 1 root root 1082 Sep 25 16:42 controller-manager.csr
-rw------- 1 root root 1675 Sep 25 16:42 controller-manager-key.pem
-rw-r--r-- 1 root root 1501 Sep 25 16:42 controller-manager.pem
drwxr-xr-x 2 root root 84 Sep 25 16:37 etcd
-rw-r--r-- 1 root root 891 Sep 25 16:41 front-proxy-ca.csr
-rw------- 1 root root 1679 Sep 25 16:41 front-proxy-ca-key.pem
-rw-r--r-- 1 root root 1094 Sep 25 16:41 front-proxy-ca.pem
-rw-r--r-- 1 root root 903 Sep 25 16:42 front-proxy-client.csr
-rw------- 1 root root 1675 Sep 25 16:42 front-proxy-client-key.pem
-rw-r--r-- 1 root root 1188 Sep 25 16:42 front-proxy-client.pem
-rw------- 1 root root 1679 Sep 25 16:51 sa.key
-rw-r--r-- 1 root root 451 Sep 25 16:51 sa.pub
-rw-r--r-- 1 root root 1058 Sep 25 16:48 scheduler.csr
-rw------- 1 root root 1679 Sep 25 16:48 scheduler-key.pem
-rw-r--r-- 1 root root 1476 Sep 25 16:48 scheduler.pem
/etc/kubernetes/pki/etcd:
total 0
lrwxrwxrwx 1 root root 29 Sep 25 16:37 etcd-ca-key.pem -> etc/etcd/ssl/etcd-ca-key.pem
lrwxrwxrwx 1 root root 25 Sep 25 16:37 etcd-ca.pem -> etc/etcd/ssl/etcd-ca.pem
lrwxrwxrwx 1 root root 26 Sep 25 16:37 etcd-key.pem -> etc/etcd/ssl/etcd-key.pem
lrwxrwxrwx 1 root root 22 Sep 25 16:37 etcd.pem -> etc/etcd/ssl/etcd.pe
[root@k8s-master01 pki]# ls etc/kubernetes/pki | grep -v etcd |wc -l
23
# 一共23个就对了
7.4 Kubernetes组件配置
master节点创建相关目录
[root@k8s-master01 pki]# cd
[root@k8s-master01 ~]# mkdir -p etc/kubernetes/manifests/ etc/systemd/system/kubelet.service.d var/lib/kubelet var/log/kubernetes
[root@k8s-master02 ~]# mkdir -p etc/kubernetes/manifests/ etc/systemd/system/kubelet.service.d var/lib/kubelet var/log/kubernetes
[root@k8s-master03 ~]# mkdir -p etc/kubernetes/manifests/ etc/systemd/system/kubelet.service.d var/lib/kubelet var/log/kubernetes
7.4.1 Apiserver
所有Master节点创建kube-apiserver service，# 注意，如果不是高可用集群，172.31.3.188改为master01的地址
7.4.1.1 Master01配置
注意本文档使用的k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
[root@k8s-master01 ~]# cat > lib/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=172.31.3.101 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://172.31.3.108:2379,https://172.31.3.109:2379,https://172.31.3.110:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
7.4.1.2 Master02配置
注意本文档使用的k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
[root@k8s-master02 ~]# cat > lib/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=172.31.3.102 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://172.31.3.108:2379,https://172.31.3.109:2379,https://172.31.3.110:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
7.4.1.3 Master03配置
注意本文档使用的k8s service网段为10.96.0.0/12，该网段不能和宿主机的网段、Pod网段的重复，请按需修改
[root@k8s-master03 ~]# cat > lib/systemd/system/kube-apiserver.service <<EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-apiserver \\
--v=2 \\
--logtostderr=true \\
--allow-privileged=true \\
--bind-address=0.0.0.0 \\
--secure-port=6443 \\
--advertise-address=172.31.3.103 \\
--service-cluster-ip-range=10.96.0.0/12 \\
--service-node-port-range=30000-32767 \\
--etcd-servers=https://172.31.3.108:2379,https://172.31.3.109:2379,https://172.31.3.110:2379 \\
--etcd-cafile=/etc/etcd/ssl/etcd-ca.pem \\
--etcd-certfile=/etc/etcd/ssl/etcd.pem \\
--etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \\
--client-ca-file=/etc/kubernetes/pki/ca.pem \\
--tls-cert-file=/etc/kubernetes/pki/apiserver.pem \\
--tls-private-key-file=/etc/kubernetes/pki/apiserver-key.pem \\
--kubelet-client-certificate=/etc/kubernetes/pki/apiserver.pem \\
--kubelet-client-key=/etc/kubernetes/pki/apiserver-key.pem \\
--service-account-key-file=/etc/kubernetes/pki/sa.pub \\
--service-account-signing-key-file=/etc/kubernetes/pki/sa.key \\
--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota \\
--authorization-mode=Node,RBAC \\
--enable-bootstrap-token-auth=true \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.pem \\
--proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client-key.pem \\
--requestheader-allowed-names=aggregator \\
--requestheader-group-headers=X-Remote-Group \\
--requestheader-extra-headers-prefix=X-Remote-Extra- \\
--requestheader-username-headers=X-Remote-User
# --token-auth-file=/etc/kubernetes/token.csv
Restart=on-failure
RestartSec=10s
LimitNOFILE=65535
[Install]
WantedBy=multi-user.target
EOF
7.4.1.4 启动apiserver
所有Master节点开启kube-apiserver
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-apiserver
[root@k8s-master02 ~]# systemctl daemon-reload && systemctl enable --now kube-apiserver
[root@k8s-master03 ~]# systemctl daemon-reload && systemctl enable --now kube-apiserver
检测kube-server状态
[root@k8s-master01 ~]# systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2022-09-25 16:53:11 CST; 12s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6154 (kube-apiserver)
Tasks: 14 (limit: 23474)
Memory: 259.5M
CGroup: system.slice/kube-apiserver.service
└─6154 usr/local/bin/kube-apiserver --v=2 --logtostderr=true --allow-privileged=true --bind-address=0.0.0.0 --secure-port=6443 --a>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.657786 6154 storage_rbac.go:321] created rolebinding.rbac.a>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.672982 6154 storage_rbac.go:321] created rolebinding.rbac.a>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.684131 6154 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.689793 6154 storage_rbac.go:321] created rolebinding.rbac.a>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.705317 6154 storage_rbac.go:321] created rolebinding.rbac.a>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.817048 6154 alloc.go:327] "allocated clusterIPs" service="d>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: W0925 16:53:19.839303 6154 lease.go:250] Resetting endpoints for master se>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.840909 6154 controller.go:616] quota admission added evalua>
Sep 25 16:53:19 k8s-master01.example.local kube-apiserver[6154]: I0925 16:53:19.878881 6154 controller.go:616] quota admission added evalua>
[root@k8s-master02 ~]# systemctl status kube-apiserver
[root@k8s-master03 ~]# systemctl status kube-apiserver
7.4.2 ControllerManager
所有Master节点配置kube-controller-manager service
注意本文档使用的k8s Pod网段为192.168.0.0/12，该网段不能和宿主机的网段、k8s Service网段的重复，请按需修改
[root@k8s-master01 ~]# cat > lib/systemd/system/kube-controller-manager.service <<EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-controller-manager \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--root-ca-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem \\
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem \\
--service-account-private-key-file=/etc/kubernetes/pki/sa.key \\
--kubeconfig=/etc/kubernetes/controller-manager.kubeconfig \\
--leader-elect=true \\
--use-service-account-credentials=true \\
--node-monitor-grace-period=40s \\
--node-monitor-period=5s \\
--pod-eviction-timeout=2m0s \\
--controllers=*,bootstrapsigner,tokencleaner \\
--allocate-node-cidrs=true \\
--cluster-cidr=192.168.0.0/12 \\
--requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem \\
--node-cidr-mask-size=24
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do scp lib/systemd/system/kube-controller-manager.service $NODE:/lib/systemd/system/; done
所有Master节点启动kube-controller-manager
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-controller-manager
[root@k8s-master02 ~]# systemctl daemon-reload && systemctl enable --now kube-controller-manager
[root@k8s-master03 ~]# systemctl daemon-reload && systemctl enable --now kube-controller-manager
查看启动状态
[root@k8s-master01 ~]# systemctl status kube-controller-manager
● kube-controller-manager.service - Kubernetes Controller Manager
Loaded: loaded (/usr/lib/systemd/system/kube-controller-manager.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2022-09-25 16:54:21 CST; 16s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6212 (kube-controller)
Tasks: 11 (limit: 23474)
Memory: 35.3M
CGroup: system.slice/kube-controller-manager.service
└─6212 usr/local/bin/kube-controller-manager --v=2 --logtostderr=true --bind-address=127.0.0.1 --root-ca-file=/etc/kubernetes/pki/>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.274767 6212 shared_informer.go:262] Caches are syn>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.274835 6212 taint_manager.go:204] "Starting NoExec>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.274896 6212 taint_manager.go:209] "Sending events >
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.302454 6212 shared_informer.go:262] Caches are syn>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.303795 6212 shared_informer.go:262] Caches are syn>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.303859 6212 resource_quota_controller.go:462] sync>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.643168 6212 shared_informer.go:262] Caches are syn>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.643226 6212 garbagecollector.go:263] synced garbag>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.680675 6212 shared_informer.go:262] Caches are syn>
Sep 25 16:54:35 k8s-master01.example.local kube-controller-manager[6212]: I0925 16:54:35.680732 6212 garbagecollector.go:163] Garbage colle>
[root@k8s-master02 ~]# systemctl status kube-controller-manager
[root@k8s-master03 ~]# systemctl status kube-controller-manager
7.4.3 Scheduler
所有Master节点配置kube-scheduler service
[root@k8s-master01 ~]# cat > lib/systemd/system/kube-scheduler.service <<EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-scheduler \\
--v=2 \\
--logtostderr=true \\
--bind-address=127.0.0.1 \\
--leader-elect=true \\
--kubeconfig=/etc/kubernetes/scheduler.kubeconfig
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do scp lib/systemd/system/kube-scheduler.service $NODE:/lib/systemd/system/; done
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-scheduler
[root@k8s-master02 ~]# systemctl daemon-reload && systemctl enable --now kube-scheduler
[root@k8s-master03 ~]# systemctl daemon-reload && systemctl enable --now kube-scheduler
[root@k8s-master01 ~]# systemctl status kube-scheduler
● kube-scheduler.service - Kubernetes Scheduler
Loaded: loaded (/usr/lib/systemd/system/kube-scheduler.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2022-09-25 16:55:26 CST; 14s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6268 (kube-scheduler)
Tasks: 7 (limit: 23474)
Memory: 13.9M
CGroup: system.slice/kube-scheduler.service
└─6268 usr/local/bin/kube-scheduler --v=2 --logtostderr=true --bind-address=127.0.0.1 --leader-elect=true --kubeconfig=/etc/kubern>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: schedulerName: default-scheduler
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: >
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.648331 6268 server.go:148] "Starting Kubernetes Scheduler" >
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.648349 6268 server.go:150] "Golang settings" GOGC="" GOMAXP>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.650630 6268 tlsconfig.go:200] "Loaded serving cert" certNam>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.650785 6268 named_certificates.go:53] "Loaded SNI cert" ind>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.650811 6268 secure_serving.go:210] Serving securely on 127.>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.651921 6268 tlsconfig.go:240] "Starting DynamicServingCerti>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.752899 6268 leaderelection.go:248] attempting to acquire le>
Sep 25 16:55:27 k8s-master01.example.local kube-scheduler[6268]: I0925 16:55:27.771438 6268 leaderelection.go:258] successfully acquired le>
[root@k8s-master02 ~]# systemctl status kube-scheduler
[root@k8s-master03 ~]# systemctl status kube-scheduler
7.4.4 TLS Bootstrapping配置
在Master01创建bootstrap
[root@k8s-master01 ~]# cat > bootstrap.secret.yaml <<EOF
apiVersion: v1
kind: Secret
metadata:
name: bootstrap-token-c8ad9c
namespace: kube-system
type: bootstrap.kubernetes.io/token
stringData:
description: "The default bootstrap token generated by 'kubelet '."
token-id: c8ad9c
token-secret: 2e4d610cf3e7426e
usage-bootstrap-authentication: "true"
usage-bootstrap-signing: "true"
auth-extra-groups: system:bootstrappers:default-node-token,system:bootstrappers:worker,system:bootstrappers:ingress
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: kubelet-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node-bootstrapper
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-bootstrap
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:bootstrappers:default-node-token
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: node-autoapprove-certificate-rotation
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:certificates.k8s.io:certificatesigningrequests:selfnodeclient
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: Group
name: system:nodes
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:kube-apiserver-to-kubelet
rules:
- apiGroups:
- ""
resources:
- nodes/proxy
- nodes/stats
- nodes/log
- nodes/spec
- nodes/metrics
verbs:
- "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: system:kube-apiserver
namespace: ""
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:kube-apiserver-to-kubelet
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: kube-apiserver
EOF
# 注意，如果不是高可用集群，172.31.3.188:6443改为master01的地址
[root@k8s-master01 ~]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://172.31.3.188:6443 --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
#执行结果
Cluster "kubernetes" set.
[root@k8s-master01 ~]# kubectl config set-credentials tls-bootstrap-token-user --token=c8ad9c.2e4d610cf3e7426e --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
#执行结果
User "tls-bootstrap-token-user" set.
[root@k8s-master01 ~]# kubectl config set-context tls-bootstrap-token-user@kubernetes --cluster=kubernetes --user=tls-bootstrap-token-user --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
#执行结果
Context "tls-bootstrap-token-user@kubernetes" modified.
[root@k8s-master01 ~]# kubectl config use-context tls-bootstrap-token-user@kubernetes --kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig
#执行结果
Switched to context "tls-bootstrap-token-user@kubernetes".
注意：如果要修改bootstrap.secret.yaml的token-id和token-secret，需要保证下图红圈内的字符串一致的，并且位数是一样的。还要保证上个命令的黄色字体：c8ad9c.2e4d610cf3e7426e与你修改的字符串要一致
[root@k8s-master01 ~]# mkdir -p /root/.kube ; cp /etc/kubernetes/admin.kubeconfig /root/.kube/config
#查看集群状态，没问题的话继续后续操作
[root@k8s-master01 ~]# kubectl get cs
Warning: v1 ComponentStatus is deprecated in v1.19+
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-1 Healthy {"health":"true","reason":""}
etcd-2 Healthy {"health":"true","reason":""}
etcd-0 Healthy {"health":"true","reason":""}
[root@k8s-master01 ~]# kubectl create -f bootstrap.secret.yaml
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do
for FILE in bootstrap-kubelet.kubeconfig; do
scp /etc/kubernetes/$FILE $NODE:/etc/kubernetes/${FILE}
done
done
7.4.5 Kubelet配置
master节点配置kubelet.service
[root@k8s-master01 ~]# cat > /lib/systemd/system/kubelet.service <<EOF
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
ExecStart=/usr/local/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
EOF
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do scp /lib/systemd/system/kubelet.service $NODE:/lib/systemd/system/ ;done
master节点配置10-kubelet.conf的配置文件
[root@k8s-master01 ~]# cat > /etc/systemd/system/kubelet.service.d/10-kubelet.conf <<EOF
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--hostname-override=172.31.3.101"
Environment="KUBELET_RINTIME=--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=''"
ExecStart=
ExecStart=/usr/local/bin/kubelet \$KUBELET_KUBECONFIG_ARGS \$KUBELET_CONFIG_ARGS \$KUBELET_SYSTEM_ARGS \$KUBELET_EXTRA_ARGS \$KUBELET_RINTIME
EOF
[root@k8s-master02 ~]# cat > /etc/systemd/system/kubelet.service.d/10-kubelet.conf <<EOF
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--hostname-override=172.31.3.102"
Environment="KUBELET_RINTIME=--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=''"
ExecStart=
ExecStart=/usr/local/bin/kubelet \$KUBELET_KUBECONFIG_ARGS \$KUBELET_CONFIG_ARGS \$KUBELET_SYSTEM_ARGS \$KUBELET_EXTRA_ARGS \$KUBELET_RINTIME
EOF
[root@k8s-master03 ~]# cat > /etc/systemd/system/kubelet.service.d/10-kubelet.conf <<EOF
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kubelet.kubeconfig"
Environment="KUBELET_SYSTEM_ARGS=--hostname-override=172.31.3.103"
Environment="KUBELET_RINTIME=--container-runtime=remote --container-runtime-endpoint=unix:///run/containerd/containerd.sock"
Environment="KUBELET_CONFIG_ARGS=--config=/etc/kubernetes/kubelet-conf.yml"
Environment="KUBELET_EXTRA_ARGS=--node-labels=node.kubernetes.io/node=''"
ExecStart=
ExecStart=/usr/local/bin/kubelet \$KUBELET_KUBECONFIG_ARGS \$KUBELET_CONFIG_ARGS \$KUBELET_SYSTEM_ARGS \$KUBELET_EXTRA_ARGS \$KUBELET_RINTIME
EOF
下载镜像并上传至harbor：
[root@k8s-master01 ~]# nerdctl login harbor.raymonds.cc
Enter Username: admin
Enter Password:
WARN[0003] skipping verifying HTTPS certs for "harbor.raymonds.cc"
WARNING: Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@k8s-master01 ~]# cat download_pause_images.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-01-11
#FileName: download_pause_images.sh
#URL: raymond.blog.csdn.net
#Description: The test script
#Copyright (C): 2022 All rights reserved
#*********************************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
PAUSE_VERSION=3.8
HARBOR_DOMAIN=harbor.raymonds.cc
images_download(){
${COLOR}"开始下载Pause镜像"${END}
nerdctl pull registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION}
nerdctl tag registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION} ${HARBOR_DOMAIN}/google_containers/pause:${PAUSE_VERSION}
nerdctl rmi registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION}
nerdctl push ${HARBOR_DOMAIN}/google_containers/pause:${PAUSE_VERSION}
${COLOR}"Pause镜像下载完成"${END}
}
images_download
[root@k8s-master01 ~]# bash download_pause_images.sh
[root@k8s-master01 ~]# nerdctl images
REPOSITORY TAG IMAGE ID CREATED PLATFORM SIZE BLOB SIZE
harbor.raymonds.cc/google_containers/pause 3.8 900118502363 22 seconds ago linux/amd64 696.0 KiB 304.0 KiB
master创建kubelet的配置文件
注意：如果更改了k8s的service网段，需要更改kubelet-conf.yml 的clusterDNS:配置，改成k8s Service网段的第十个地址，比如10.96.0.10
[root@k8s-master01 ~]# cat > /etc/kubernetes/kubelet-conf.yml <<EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
anonymous:
enabled: false
webhook:
cacheTTL: 2m0s
enabled: true
x509:
clientCAFile: /etc/kubernetes/pki/ca.pem
authorization:
mode: Webhook
webhook:
cacheAuthorizedTTL: 5m0s
cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
imagefs.available: 15%
memory.available: 100Mi
nodefs.available: 10%
nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do scp /etc/kubernetes/kubelet-conf.yml $NODE:/etc/kubernetes/ ;done
启动master节点kubelet
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kubelet
[root@k8s-master02 ~]# systemctl daemon-reload && systemctl enable --now kubelet
[root@k8s-master03 ~]# systemctl daemon-reload && systemctl enable --now kubelet
[root@k8s-master01 ~]# systemctl status kubelet
● kubelet.service - Kubernetes Kubelet
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/kubelet.service.d
└─10-kubelet.conf
Active: active (running) since Sun 2022-09-25 17:18:36 CST; 30s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6441 (kubelet)
Tasks: 14 (limit: 23474)
Memory: 34.6M
CGroup: /system.slice/kubelet.service
└─6441 /usr/local/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kube>
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: E0925 17:18:50.215908 6441 kubelet.go:2448] "Error getting node" err="node \"172.>
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: I0925 17:18:50.317300 6441 kuberuntime_manager.go:1050] "Updating runtime config >
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: I0925 17:18:50.318585 6441 kubelet_network.go:60] "Updating Pod CIDR" originalPod>
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: E0925 17:18:50.318962 6441 kubelet.go:2373] "Container runtime network not ready">
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: I0925 17:18:50.577724 6441 apiserver.go:52] "Watching apiserver"
Sep 25 17:18:50 k8s-master01.example.local kubelet[6441]: I0925 17:18:50.593173 6441 reconciler.go:169] "Reconciler: start to sync state"
Sep 25 17:18:51 k8s-master01.example.local kubelet[6441]: E0925 17:18:51.875100 6441 kubelet.go:2373] "Container runtime network not ready">
Sep 25 17:18:56 k8s-master01.example.local kubelet[6441]: E0925 17:18:56.879725 6441 kubelet.go:2373] "Container runtime network not ready">
Sep 25 17:19:01 k8s-master01.example.local kubelet[6441]: E0925 17:19:01.881566 6441 kubelet.go:2373] "Container runtime network not ready">
Sep 25 17:19:06 k8s-master01.example.local kubelet[6441]: E0925 17:19:06.882411 6441 kubelet.go:2373] "Container runtime network not ready">
[root@k8s-master02 ~]# systemctl status kubelet
[root@k8s-master03 ~]# systemctl status kubelet
此时系统日志
#显示只有如下信息为正常
[root@k8s-master01 ~]# tail -f /var/log/messages #ubuntu命令为"tail -f /var/log/syslog"
...
Sep 23 15:11:22 localhost kubelet[16173]: E0923 15:11:22.503340 16173 kubelet.go:2373] "Container runtime network not ready" networkReady="NetworkReady=false reason:NetworkPluginNotReady message:docker: network plugin is not ready: cni config uninitialized"
查看集群状态
[root@k8s-master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
172.31.3.101 NotReady <none> 38s v1.25.2
172.31.3.102 NotReady <none> 35s v1.25.2
172.31.3.103 NotReady <none> 33s v1.25.2
7.4.6 kube-proxy配置
# 注意，如果不是高可用集群，172.31.3.188:6443改为master01的地址
[root@k8s-master01 ~]# kubectl -n kube-system create serviceaccount kube-proxy
#执行结果
serviceaccount/kube-proxy created
[root@k8s-master01 ~]# kubectl create clusterrolebinding system:kube-proxy --clusterrole system:node-proxier --serviceaccount kube-system:kube-proxy
#执行结果
clusterrolebinding.rbac.authorization.k8s.io/system:kube-proxy created
[root@k8s-master01 ~]# cat > kube-proxy-scret.yml <<EOF
apiVersion: v1
kind: Secret
metadata:
name: kube-proxy
namespace: kube-system
annotations:
kubernetes.io/service-account.name: "kube-proxy"
type: kubernetes.io/service-account-token
EOF
[root@k8s-master01 ~]# kubectl apply -f kube-proxy-scret.yml
#执行结果
secret/kube-proxy created
[root@k8s-master01 ~]# JWT_TOKEN=$(kubectl -n kube-system get secret/kube-proxy \
--output=jsonpath='{.data.token}' | base64 -d)
[root@k8s-master01 ~]# kubectl config set-cluster kubernetes --certificate-authority=/etc/kubernetes/pki/ca.pem --embed-certs=true --server=https://172.31.3.188:6443 --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
#执行结果
Cluster "kubernetes" set.
[root@k8s-master01 ~]# kubectl config set-credentials kubernetes --token=${JWT_TOKEN} --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
#执行结果
User "kubernetes" set.
[root@k8s-master01 ~]# kubectl config set-context kubernetes --cluster=kubernetes --user=kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
#执行结果
Context "kubernetes" created.
[root@k8s-master01 ~]# kubectl config use-context kubernetes --kubeconfig=/etc/kubernetes/kube-proxy.kubeconfig
#执行结果
Switched to context "kubernetes".
在master01将kube-proxy的systemd Service文件发送到其他节点
如果更改了集群Pod的网段，需要更改kube-proxy/kube-proxy.conf的clusterCIDR: 192.168.0.0/12参数为pod的网段。
[root@k8s-master01 ~]# cat > /etc/kubernetes/kube-proxy.conf <<EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
acceptContentTypes: ""
burst: 10
contentType: application/vnd.kubernetes.protobuf
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
qps: 5
clusterCIDR: 192.168.0.0/12
configSyncPeriod: 15m0s
conntrack:
max: null
maxPerCore: 32768
min: 131072
tcpCloseWaitTimeout: 1h0m0s
tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
masqueradeAll: false
masqueradeBit: 14
minSyncPeriod: 0s
syncPeriod: 30s
ipvs:
masqueradeAll: true
minSyncPeriod: 5s
scheduler: "rr"
syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
[root@k8s-master01 ~]# cat > /lib/systemd/system/kube-proxy.service <<EOF
[Unit]
Description=Kubernetes Kube Proxy
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
ExecStart=/usr/local/bin/kube-proxy \\
--config=/etc/kubernetes/kube-proxy.conf \\
--v=2
Restart=always
RestartSec=10s
[Install]
WantedBy=multi-user.target
EOF
[root@k8s-master01 ~]# for NODE in k8s-master02 k8s-master03; do
scp /etc/kubernetes/kube-proxy.kubeconfig $NODE:/etc/kubernetes/kube-proxy.kubeconfig
scp /etc/kubernetes/kube-proxy.conf $NODE:/etc/kubernetes/kube-proxy.conf
scp /lib/systemd/system/kube-proxy.service $NODE:/lib/systemd/system/kube-proxy.service
done
master节点启动kube-proxy
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now kube-proxy
[root@k8s-master02 ~]# systemctl daemon-reload && systemctl enable --now kube-proxy
[root@k8s-master03 ~]# systemctl daemon-reload && systemctl enable --now kube-proxy
[root@k8s-master01 ~]# systemctl status kube-proxy
● kube-proxy.service - Kubernetes Kube Proxy
Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
Active: active (running) since Sun 2022-09-25 17:21:25 CST; 31s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6633 (kube-proxy)
Tasks: 6 (limit: 23474)
Memory: 10.5M
CGroup: /system.slice/kube-proxy.service
└─6633 /usr/local/bin/kube-proxy --config=/etc/kubernetes/kube-proxy.conf --v=2
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: I0925 17:21:25.255233 6633 flags.go:64] FLAG: --write-config-to=""
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: I0925 17:21:25.256063 6633 server.go:442] "Using lenient decoding as strict de>
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: I0925 17:21:25.256192 6633 feature_gate.go:245] feature gates: &{map[]}
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: I0925 17:21:25.256265 6633 feature_gate.go:245] feature gates: &{map[]}
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: I0925 17:21:25.275422 6633 proxier.go:666] "Failed to load kernel module with >
Sep 25 17:21:25 k8s-master01.example.local kube-proxy[6633]: E0925 17:21:25.295761 6633 node.go:152] Failed to retrieve node info: nodes "k>
Sep 25 17:21:26 k8s-master01.example.local kube-proxy[6633]: E0925 17:21:26.318886 6633 node.go:152] Failed to retrieve node info: nodes "k>
Sep 25 17:21:28 k8s-master01.example.local kube-proxy[6633]: E0925 17:21:28.497970 6633 node.go:152] Failed to retrieve node info: nodes "k>
Sep 25 17:21:32 k8s-master01.example.local kube-proxy[6633]: E0925 17:21:32.991308 6633 node.go:152] Failed to retrieve node info: nodes "k>
Sep 25 17:21:41 k8s-master01.example.local kube-proxy[6633]: E0925 17:21:41.810292 6633 node.go:152] Failed to retrieve node info: nodes "k>
[root@k8s-master02 ~]# systemctl status kube-proxy
[root@k8s-master03 ~]# systemctl status kube-proxy
[root@k8s-master01 ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
172.31.3.101 NotReady <none> 3m29s v1.25.2
172.31.3.102 NotReady <none> 3m26s v1.25.2
172.31.3.103 NotReady <none> 3m24s v1.25.2
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