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、docker、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master2 | k8s-master02.example.local | 2C4G | 172.31.3.102 | chrony-client、docker、kube-controller-manager、kube-scheduler、kube-apiserver、kubelet、kube-proxy、kubectl |
| master3 | k8s-master03.example.local | 2C4G | 172.31.3.103 | chrony-client、docker、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、docker、etcd |
| etcd2 | k8s-etcd02.example.local | 2C2G | 172.31.3.109 | chrony-client、docker、etcd |
| etcd3 | k8s-etcd03.example.local | 2C2G | 172.31.3.110 | chrony-client、docker、etcd |
| node1 | k8s-node01.example.local | 2C4G | 172.31.3.111 | chrony-client、docker、kubelet、kube-proxy |
| node2 | k8s-node02.example.local | 2C4G | 172.31.3.112 | chrony-client、docker、kubelet、kube-proxy |
| node3 | k8s-node03.example.local | 2C4G | 172.31.3.113 | chrony-client、docker、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 | Docker CE 20.10.18 |
| CRI | cri-dockerd v0.2.5 |
| 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
2022/09/23 18:35:17 [INFO] generating a new CA key and certificate from CSR
2022/09/23 18:35:17 [INFO] generate received request
2022/09/23 18:35:17 [INFO] received CSR
2022/09/23 18:35:17 [INFO] generating key: rsa-2048
2022/09/23 18:35:17 [INFO] encoded CSR
2022/09/23 18:35:17 [INFO] signed certificate with serial number 65415200689005849326046564234137211330944655923
[root@k8s-etcd01 pki]# ll etc/etcd/ssl/etcd-ca*
-rw-r--r-- 1 root root 1050 Sep 23 18:35 etc/etcd/ssl/etcd-ca.csr
-rw------- 1 root root 1675 Sep 23 18:35 etc/etcd/ssl/etcd-ca-key.pem
-rw-r--r-- 1 root root 1318 Sep 23 18:35 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
2022/09/23 18:36:23 [INFO] generate received request
2022/09/23 18:36:23 [INFO] received CSR
2022/09/23 18:36:23 [INFO] generating key: rsa-2048
2022/09/23 18:36:23 [INFO] encoded CSR
2022/09/23 18:36:23 [INFO] signed certificate with serial number 57025746747953211731842881796557477311764698669
[root@k8s-etcd01 pki]# ll etc/etcd/ssl/etcd*
...
-rw-r--r-- 1 root root 1123 Sep 23 18:36 etc/etcd/ssl/etcd.csr
-rw------- 1 root root 1679 Sep 23 18:36 etc/etcd/ssl/etcd-key.pem
-rw-r--r-- 1 root root 1456 Sep 23 18:36 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 Fri 2022-09-23 18:39:14 CST; 10s ago
Docs: https://coreos.com/etcd/docs/latest/
Main PID: 5091 (etcd)
Tasks: 7 (limit: 11192)
Memory: 19.0M
CGroup: system.slice/etcd.service
└─5091 usr/local/bin/etcd --config-file=/etc/etcd/etcd.config.yml
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.824+0800","caller":"rafthttp/peer_status.go:53">
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.824+0800","caller":"rafthttp/stream.go:412","ms>
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.824+0800","caller":"rafthttp/stream.go:412","ms>
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.832+0800","caller":"rafthttp/stream.go:249","ms>
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.832+0800","caller":"rafthttp/stream.go:274","ms>
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.833+0800","caller":"rafthttp/stream.go:249","ms>
Sep 23 18:39:15 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:15.833+0800","caller":"rafthttp/stream.go:274","ms>
Sep 23 18:39:18 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:18.195+0800","caller":"etcdserver/server.go:2512",>
Sep 23 18:39:18 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:18.196+0800","caller":"membership/cluster.go:576",>
Sep 23 18:39:18 k8s-etcd01.example.local etcd[5091]: {"level":"info","ts":"2022-09-23T18:39:18.197+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.Runtime安装
6.1 安装docker
master和node安装docker-ce：
[root@k8s-master01 ~]# cat install_docker_binary.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2021-12-07
#FileName: install_docker_binary.sh
#URL: raymond.blog.csdn.net
#Description: install_docker_binary 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
HARBOR_DOMAIN=harbor.raymonds.cc
os(){
OS_ID=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' etc/os-release`
}
check_file (){
cd ${SRC_DIR}
rpm -q wget &> dev/null || yum -y install wget &> dev/null
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}
${COLOR}'开始下载DOCKER二进制安装包'${END}
wget ${URL}${DOCKER_FILE} || { ${COLOR}"DOCKER二进制安装包下载失败"${END}; exit; }
else
${COLOR}"相关文件已准备好"${END}
fi
}
install(){
[ -f usr/bin/docker ] && { ${COLOR}"DOCKER已存在，安装失败"${END};exit; }
${COLOR}"开始安装DOCKER..."${END}
tar xf ${DOCKER_FILE}
mv docker/* usr/bin/
if ! getent group docker > dev/null; then
groupadd --system docker
fi
cat > usr/lib/systemd/system/docker.socket <<-EOF
[Unit]
Description=Docker Socket for the API
[Socket]
ListenStream=/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
cat > usr/lib/systemd/system/containerd.service <<-EOF
# Copyright The containerd Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
# Comment TasksMax if your systemd version does not supports it.
# Only systemd 226 and above support this version.
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
cat > usr/lib/systemd/system/docker.service <<-EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target docker.socket firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[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 fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3
# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s
# Having non-zero Limit*s causes performance problems due to accounting overhead
# in the kernel. We recommend using cgroups to do container-local accounting.
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
# set delegate yes so that systemd does not reset the cgroups of docker containers
Delegate=yes
# kill only the docker process, not all processes in the cgroup
KillMode=process
OOMScoreAdjust=-500
[Install]
WantedBy=multi-user.target
EOF
mkdir -p etc/docker
cat > etc/docker/daemon.json <<-EOF
{
"registry-mirrors": [
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn"
],
"insecure-registries": ["${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}
}
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
set_swap_limit
}
main
[root@k8s-master01 ~]# bash install_docker_binary.sh
[root@k8s-master02 ~]# bash install_docker_binary.sh
[root@k8s-master03 ~]# bash install_docker_binary.sh
[root@k8s-node01 ~]# bash install_docker_binary.sh
[root@k8s-node02 ~]# bash install_docker_binary.sh
[root@k8s-node03 ~]# bash install_docker_binary.sh
6.2 安装 cri-dockerd
Kubernetes自v1.24移除了对docker-shim的支持，而Docker Engine默认又不支持CRI规范，因而二者将无法直接完成整合。为此，Mirantis和Docker联合创建了cri-dockerd项目，用于为Docker Engine提供一个能够支持到CRI规范的垫片，从而能够让Kubernetes基于CRI控制Docker 。
项目地址：https://github.com/Mirantis/cri-dockerd
cri-dockerd项目提供了预制的二制格式的程序包，用户按需下载相应的系统和对应平台的版本即可完成安装，这里以Ubuntu 20.04 64bits系统环境，以及cri-dockerd目前最新的程序版本v0.2.5为例。
[root@k8s-master01 ~]# wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.5/cri-dockerd-0.2.5.amd64.tgz
[root@k8s-master01 ~]# tar xf cri-dockerd-0.2.5.amd64.tgz
[root@k8s-master01 ~]# mv cri-dockerd/* usr/bin/
[root@k8s-master01 ~]# ll usr/bin/cri-dockerd
-rwxr-xr-x 1 root root 52351080 Sep 3 07:00 usr/bin/cri-dockerd*
[root@k8s-master01 ~]# cat > usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket
[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd://
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3
# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s
# 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
# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
[root@k8s-master01 ~]# cat > usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service
[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
[root@k8s-master01 ~]# sed -ri '/ExecStart.*/s@(ExecStart.*)@\1 --pod-infra-container-image harbor.raymonds.cc/google_containers/pause:3.8@g' lib/systemd/system/cri-docker.service
#注意：如果没有harbor执行下面命令
[root@k8s-master01 ~]# sed -ri '/ExecStart.*/s@(ExecStart.*)@\1 --pod-infra-container-image registry.aliyuncs.com/google_containers/pause:3.8@g' lib/systemd/system/cri-docker.service
[root@k8s-master01 ~]# systemctl daemon-reload && systemctl enable --now cri-docker
master02、master03和node安装：
[root@k8s-master01 ~]# cat install_cri_dockerd_binary.sh
#!/bin/bash
#
#**********************************************************************************************
#Author: Raymond
#QQ: 88563128
#Date: 2022-09-03
#FileName: install_cri_dockerd_binary.sh
#URL: raymond.blog.csdn.net
#Description: install_docker_binary 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'
#cri-dockerd下载地址：https://github.com/Mirantis/cri-dockerd/releases/download/v0.2.5/cri-dockerd-0.2.5.amd64.tgz
CRI_DOCKER_FILE=cri-dockerd-0.2.5.amd64.tgz
HARBOR_DOMAIN=harbor.raymonds.cc
check_file (){
cd ${SRC_DIR}
if [ ! -e ${CRI_DOCKER_FILE} ];then
${COLOR}"缺少${CRI_DOCKER_FILE}文件,如果是离线包,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(){
[ -f usr/bin/cri-dockerd ] && { ${COLOR}"cri-dockerd已存在，安装失败"${END};exit; }
${COLOR}"开始安装cri-dockerd..."${END}
tar xf ${CRI_DOCKER_FILE}
mv cri-dockerd/* usr/bin/
cat > usr/lib/systemd/system/cri-docker.service <<-EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket
[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd --container-runtime-endpoint fd:// --pod-infra-container-image ${HARBOR_DOMAIN}/google_containers/pause:3.8
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
# Both the old, and new location are accepted by systemd 229 and up, so using the old location
# to make them work for either version of systemd.
StartLimitBurst=3
# Note that StartLimitInterval was renamed to StartLimitIntervalSec in systemd 230.
# Both the old, and new name are accepted by systemd 230 and up, so using the old name to make
# this option work for either version of systemd.
StartLimitInterval=60s
# 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
# Comment TasksMax if your systemd version does not support it.
# Only systemd 226 and above support this option.
TasksMax=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
cat > usr/lib/systemd/system/cri-docker.socket <<-EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service
[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
systemctl daemon-reload
systemctl enable --now cri-docker &> dev/null
systemctl is-active cri-docker &> dev/null && ${COLOR}"cri-docker 服务启动成功"${END} || { ${COLOR}"cri-docker 启动失败"${END};exit; }
cri-dockerd --version && ${COLOR}"cri-dockerd 安装成功"${END} || ${COLOR}"cri-dockerd 安装失败"${END}
}
main(){
check_file
install
}
main
[root@k8s-master02 ~]# bash install_cri_dockerd_binary.sh
[root@k8s-master03 ~]# bash install_cri_dockerd_binary.sh
[root@k8s-node01 ~]# bash install_cri_dockerd_binary.sh
[root@k8s-node02 ~]# bash install_cri_dockerd_binary.sh
[root@k8s-node03 ~]# bash install_cri_dockerd_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
2022/09/23 19:02:38 [INFO] generating a new CA key and certificate from CSR
2022/09/23 19:02:38 [INFO] generate received request
2022/09/23 19:02:38 [INFO] received CSR
2022/09/23 19:02:38 [INFO] generating key: rsa-2048
2022/09/23 19:02:38 [INFO] encoded CSR
2022/09/23 19:02:38 [INFO] signed certificate with serial number 300246035273547949949054133479321620737070405660
[root@k8s-master01 pki]# ll etc/kubernetes/pki/ca*
-rw-r--r-- 1 root root 1070 Sep 23 19:02 etc/kubernetes/pki/ca.csr
-rw------- 1 root root 1679 Sep 23 19:02 etc/kubernetes/pki/ca-key.pem
-rw-r--r-- 1 root root 1363 Sep 23 19:02 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
2022/09/23 19:07:22 [INFO] generate received request
2022/09/23 19:07:22 [INFO] received CSR
2022/09/23 19:07:22 [INFO] generating key: rsa-2048
2022/09/23 19:07:22 [INFO] encoded CSR
2022/09/23 19:07:22 [INFO] signed certificate with serial number 97639055323963738097663089184954029439938106495
[root@k8s-master01 pki]# ll etc/kubernetes/pki/apiserver*
-rw-r--r-- 1 root root 1297 Sep 23 19:07 etc/kubernetes/pki/apiserver.csr
-rw------- 1 root root 1675 Sep 23 19:07 etc/kubernetes/pki/apiserver-key.pem
-rw-r--r-- 1 root root 1692 Sep 23 19:07 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
2022/09/23 19:08:04 [INFO] generating a new CA key and certificate from CSR
2022/09/23 19:08:04 [INFO] generate received request
2022/09/23 19:08:04 [INFO] received CSR
2022/09/23 19:08:04 [INFO] generating key: rsa-2048
2022/09/23 19:08:04 [INFO] encoded CSR
2022/09/23 19:08:04 [INFO] signed certificate with serial number 645044159777554404075615178297005647861235360519
[root@k8s-master01 pki]# ll etc/kubernetes/pki/front-proxy-ca*
-rw-r--r-- 1 root root 891 Sep 23 19:08 etc/kubernetes/pki/front-proxy-ca.csr
-rw------- 1 root root 1679 Sep 23 19:08 etc/kubernetes/pki/front-proxy-ca-key.pem
-rw-r--r-- 1 root root 1094 Sep 23 19:08 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）
2022/09/23 19:08:48 [INFO] generate received request
2022/09/23 19:08:48 [INFO] received CSR
2022/09/23 19:08:48 [INFO] generating key: rsa-2048
2022/09/23 19:08:48 [INFO] encoded CSR
2022/09/23 19:08:48 [INFO] signed certificate with serial number 542110043523992850338882659118864861631516149446
2022/09/23 19:08:48 [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 23 19:08 etc/kubernetes/pki/front-proxy-client.csr
-rw------- 1 root root 1675 Sep 23 19:08 etc/kubernetes/pki/front-proxy-client-key.pem
-rw-r--r-- 1 root root 1188 Sep 23 19:08 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
2022/09/23 19:09:32 [INFO] generate received request
2022/09/23 19:09:32 [INFO] received CSR
2022/09/23 19:09:32 [INFO] generating key: rsa-2048
2022/09/23 19:09:32 [INFO] encoded CSR
2022/09/23 19:09:32 [INFO] signed certificate with serial number 458236955769281375346096830700239559896822453072
2022/09/23 19:09:32 [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 23 19:09 etc/kubernetes/pki/controller-manager.csr
-rw------- 1 root root 1679 Sep 23 19:09 etc/kubernetes/pki/controller-manager-key.pem
-rw-r--r-- 1 root root 1501 Sep 23 19:09 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
2022/09/23 19:10:51 [INFO] generate received request
2022/09/23 19:10:51 [INFO] received CSR
2022/09/23 19:10:51 [INFO] generating key: rsa-2048
2022/09/23 19:10:51 [INFO] encoded CSR
2022/09/23 19:10:51 [INFO] signed certificate with serial number 186470152054476932937744145753250739942742891584
2022/09/23 19:10:51 [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 23 19:10 etc/kubernetes/pki/scheduler.csr
-rw------- 1 root root 1675 Sep 23 19:10 etc/kubernetes/pki/scheduler-key.pem
-rw-r--r-- 1 root root 1476 Sep 23 19:10 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
2022/09/23 19:12:09 [INFO] generate received request
2022/09/23 19:12:09 [INFO] received CSR
2022/09/23 19:12:09 [INFO] generating key: rsa-2048
2022/09/23 19:12:09 [INFO] encoded CSR
2022/09/23 19:12:09 [INFO] signed certificate with serial number 317231386349206655263931288739385974109450858184
2022/09/23 19:12:09 [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 23 19:12 etc/kubernetes/pki/admin.csr
-rw------- 1 root root 1679 Sep 23 19:12 etc/kubernetes/pki/admin-key.pem
-rw-r--r-- 1 root root 1444 Sep 23 19:12 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 23 19:14 etc/kubernetes/pki/sa.key
-rw-r--r-- 1 root root 451 Sep 23 19:14 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 23 19:12 admin.csr
-rw------- 1 root root 1679 Sep 23 19:12 admin-key.pem
-rw-r--r-- 1 root root 1444 Sep 23 19:12 admin.pem
-rw-r--r-- 1 root root 1297 Sep 23 19:07 apiserver.csr
-rw------- 1 root root 1675 Sep 23 19:07 apiserver-key.pem
-rw-r--r-- 1 root root 1692 Sep 23 19:07 apiserver.pem
-rw-r--r-- 1 root root 1070 Sep 23 19:02 ca.csr
-rw------- 1 root root 1679 Sep 23 19:02 ca-key.pem
-rw-r--r-- 1 root root 1363 Sep 23 19:02 ca.pem
-rw-r--r-- 1 root root 1082 Sep 23 19:09 controller-manager.csr
-rw------- 1 root root 1679 Sep 23 19:09 controller-manager-key.pem
-rw-r--r-- 1 root root 1501 Sep 23 19:09 controller-manager.pem
drwxr-xr-x 2 root root 84 Sep 23 18:57 etcd
-rw-r--r-- 1 root root 891 Sep 23 19:08 front-proxy-ca.csr
-rw------- 1 root root 1679 Sep 23 19:08 front-proxy-ca-key.pem
-rw-r--r-- 1 root root 1094 Sep 23 19:08 front-proxy-ca.pem
-rw-r--r-- 1 root root 903 Sep 23 19:08 front-proxy-client.csr
-rw------- 1 root root 1675 Sep 23 19:08 front-proxy-client-key.pem
-rw-r--r-- 1 root root 1188 Sep 23 19:08 front-proxy-client.pem
-rw------- 1 root root 1679 Sep 23 19:14 sa.key
-rw-r--r-- 1 root root 451 Sep 23 19:14 sa.pub
-rw-r--r-- 1 root root 1058 Sep 23 19:10 scheduler.csr
-rw------- 1 root root 1675 Sep 23 19:10 scheduler-key.pem
-rw-r--r-- 1 root root 1476 Sep 23 19:10 scheduler.pem
/etc/kubernetes/pki/etcd:
total 0
lrwxrwxrwx 1 root root 29 Sep 23 18:57 etcd-ca-key.pem -> etc/etcd/ssl/etcd-ca-key.pem
lrwxrwxrwx 1 root root 25 Sep 23 18:57 etcd-ca.pem -> etc/etcd/ssl/etcd-ca.pem
lrwxrwxrwx 1 root root 26 Sep 23 18:57 etcd-key.pem -> etc/etcd/ssl/etcd-key.pem
lrwxrwxrwx 1 root root 22 Sep 23 18:57 etcd.pem -> etc/etcd/ssl/etcd.pem
[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 Fri 2022-09-23 19:17:08 CST; 6s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 5775 (kube-apiserver)
Tasks: 14 (limit: 23474)
Memory: 228.7M
CGroup: system.slice/kube-apiserver.service
└─5775 usr/local/bin/kube-apiserver --v=2 --logtostderr=true --allow-privileged=true --bind-address=0.0.0.0 --secure-port=6443 --a>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: I0923 19:17:14.225207 5775 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: I0923 19:17:14.324880 5775 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: I0923 19:17:14.428060 5775 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: I0923 19:17:14.524001 5775 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: I0923 19:17:14.624035 5775 healthz.go:257] poststarthook/rbac/bootstrap-ro>
Sep 23 19:17:14 k8s-master01.example.local kube-apiserver[5775]: [-]poststarthook/rbac/bootstrap-roles failed: not finished
[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 Fri 2022-09-23 19:18:17 CST; 13s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 5834 (kube-controller)
Tasks: 6 (limit: 23474)
Memory: 24.5M
CGroup: system.slice/kube-controller-manager.service
└─5834 usr/local/bin/kube-controller-manager --v=2 --logtostderr=true --bind-address=127.0.0.1 --root-ca-file=/etc/kubernetes/pki/>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.022163 5834 controllermanager.go:573] Starting "no>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.022201 5834 tokencleaner.go:118] Starting token cl>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.022207 5834 shared_informer.go:255] Waiting for ca>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.022220 5834 shared_informer.go:262] Caches are syn>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.070984 5834 node_lifecycle_controller.go:497] Cont>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.071026 5834 controllermanager.go:602] Started "nod>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.071035 5834 controllermanager.go:573] Starting "ga>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.071076 5834 node_lifecycle_controller.go:532] Send>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.071168 5834 node_lifecycle_controller.go:543] Star>
Sep 23 19:18:30 k8s-master01.example.local kube-controller-manager[5834]: I0923 19:18:30.071177 5834 shared_informer.go:255] Waiting for ca>
[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 Fri 2022-09-23 19:19:23 CST; 12s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 5888 (kube-scheduler)
Tasks: 8 (limit: 23474)
Memory: 16.5M
CGroup: system.slice/kube-scheduler.service
└─5888 usr/local/bin/kube-scheduler --v=2 --logtostderr=true --bind-address=127.0.0.1 --leader-elect=true --kubeconfig=/etc/kubern>
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: schedulerName: default-scheduler
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: >
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.950424 5888 server.go:148] "Starting Kubernetes Scheduler" >
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.950436 5888 server.go:150] "Golang settings" GOGC="" GOMAXP>
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.951913 5888 tlsconfig.go:200] "Loaded serving cert" certNam>
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.952068 5888 named_certificates.go:53] "Loaded SNI cert" ind>
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.952090 5888 secure_serving.go:210] Serving securely on 127.>
Sep 23 19:19:23 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:23.952118 5888 tlsconfig.go:240] "Starting DynamicServingCerti>
Sep 23 19:19:24 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:24.052775 5888 leaderelection.go:248] attempting to acquire le>
Sep 23 19:19:24 k8s-master01.example.local kube-scheduler[5888]: I0923 19:19:24.072073 5888 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
er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=docker.service
Requires=docker.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:///var/run/cri-dockerd.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:///var/run/cri-dockerd.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:///var/run/cri-dockerd.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 ~]# docker login harbor.raymonds.cc
Username: admin
Password:
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}
docker pull registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION}
docker tag registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION} ${HARBOR_DOMAIN}/google_containers/pause:${PAUSE_VERSION}
docker rmi registry.aliyuncs.com/google_containers/pause:${PAUSE_VERSION}
docker 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 ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
harbor.raymonds.cc/google_containers/pause 3.8 4873874c08ef 3 months ago 711kB
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 Fri 2022-09-23 19:37:59 CST; 58s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 6366 (kubelet)
Tasks: 14 (limit: 23474)
Memory: 39.7M
CGroup: /system.slice/kubelet.service
└─6366 /usr/local/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.kubeconfig --kubeconfig=/etc/kubernetes/kube>
Sep 23 19:38:20 k8s-master01.example.local kubelet[6366]: I0923 19:38:20.019352 6366 apiserver.go:52] "Watching apiserver"
Sep 23 19:38:20 k8s-master01.example.local kubelet[6366]: I0923 19:38:20.118172 6366 reconciler.go:169] "Reconciler: start to sync state"
Sep 23 19:38:20 k8s-master01.example.local kubelet[6366]: E0923 19:38:20.464305 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:25 k8s-master01.example.local kubelet[6366]: E0923 19:38:25.474757 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:30 k8s-master01.example.local kubelet[6366]: E0923 19:38:30.483816 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:35 k8s-master01.example.local kubelet[6366]: E0923 19:38:35.494800 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:40 k8s-master01.example.local kubelet[6366]: E0923 19:38:40.504300 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:45 k8s-master01.example.local kubelet[6366]: E0923 19:38:45.512913 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:50 k8s-master01.example.local kubelet[6366]: E0923 19:38:50.521932 6366 kubelet.go:2373] "Container runtime network not ready">
Sep 23 19:38:55 k8s-master01.example.local kubelet[6366]: E0923 19:38:55.534585 6366 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> 20m v1.25.2
172.31.3.102 NotReady <none> 19m v1.25.2
172.31.3.103 NotReady <none> 19m 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 Fri 2022-09-23 19:51:23 CST; 14s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 8614 (kube-proxy)
Tasks: 5 (limit: 23474)
Memory: 10.7M
CGroup: /system.slice/kube-proxy.service
└─8614 /usr/local/bin/kube-proxy --config=/etc/kubernetes/kube-proxy.conf --v=2
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.505482 8614 flags.go:64] FLAG: --vmodule=""
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.505484 8614 flags.go:64] FLAG: --write-config-to=""
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.506970 8614 server.go:442] "Using lenient decoding as strict de>
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.507434 8614 feature_gate.go:245] feature gates: &{map[]}
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.507544 8614 feature_gate.go:245] feature gates: &{map[]}
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: I0923 19:51:23.520612 8614 proxier.go:666] "Failed to load kernel module with >
Sep 23 19:51:23 k8s-master01.example.local kube-proxy[8614]: E0923 19:51:23.550408 8614 node.go:152] Failed to retrieve node info: nodes "k>
Sep 23 19:51:24 k8s-master01.example.local kube-proxy[8614]: E0923 19:51:24.715443 8614 node.go:152] Failed to retrieve node info: nodes "k>
Sep 23 19:51:26 k8s-master01.example.local kube-proxy[8614]: E0923 19:51:26.915067 8614 node.go:152] Failed to retrieve node info: nodes "k>
Sep 23 19:51:31 k8s-master01.example.local kube-proxy[8614]: E0923 19:51:31.496512 8614 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> 20m v1.25.2
172.31.3.102 NotReady <none> 19m v1.25.2
172.31.3.103 NotReady <none> 19m v1.25.2
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