01-docker系列-linux下的docker安装

linux服务器，需要关闭selinux和防火墙，以往文章有介绍具体方式
能上外网

[yunweijia@localhost ~]$ uname -r
3.10.0-862.el7.x86_64
[yunweijia@localhost ~]$

[yunweijia@localhost ~]$ sudo yum remove docker \
>                   docker-client \
>                   docker-client-latest \
>                   docker-common \
>                   docker-latest \
>                   docker-latest-logrotate \
>                   docker-logrotate \
>                   docker-selinux \
>                   docker-engine-selinux \
>                   docker-engine
[sudo] yunweijia 的密码：
已加载插件：fastestmirror, langpacks
参数 docker 没有匹配
参数 docker-client 没有匹配
参数 docker-client-latest 没有匹配
参数 docker-common 没有匹配
参数 docker-latest 没有匹配
参数 docker-latest-logrotate 没有匹配
参数 docker-logrotate 没有匹配
参数 docker-selinux 没有匹配
参数 docker-engine-selinux 没有匹配
参数 docker-engine 没有匹配
不删除任何软件包
[yunweijia@localhost ~]$

[yunweijia@localhost ~]$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2

[yunweijia@localhost ~]$ sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

[yunweijia@localhost ~]$ yum clean all
[yunweijia@localhost ~]$ yum makecache fast

[yunweijia@localhost ~]$ sudo yum -y install docker-ce

如果报错如下信息：
错误：软件包：containerd.io-1.4.12-3.1.el7.x86_64 (docker-ce-stable)
          需要：container-selinux >= 2:2.74
错误：软件包：docker-ce-rootless-extras-20.10.12-3.el7.x86_64 (docker-ce-stable)
          需要：slirp4netns >= 0.4
错误：软件包：docker-ce-rootless-extras-20.10.12-3.el7.x86_64 (docker-ce-stable)
          需要：fuse-overlayfs >= 0.7
错误：软件包：3:docker-ce-20.10.12-3.el7.x86_64 (docker-ce-stable)
          需要：container-selinux >= 2:2.74


解决：
我们需要升级一下相关软件，下载container-selinux；


[yunweijia@localhost ~]$ sudo wget -O etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
[yunweijia@localhost ~]$ yum clean all
[yunweijia@localhost ~]$ yum makecache fast
[yunweijia@localhost ~]$ sudo yum install epel-release -y
[yunweijia@localhost ~]$ sudo yum install container-selinux -

[yunweijia@localhost ~]$ sudo yum -y install docker-ce

[yunweijia@localhost ~]$ sudo systemctl start docker
[yunweijia@localhost ~]$ sudo systemctl status docker
● docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; disabled; vendor preset: disabled)
   Active: active (running) since 二 2022-02-08 15:37:14 CST; 7s ago
     Docs: https://docs.docker.com
 Main PID: 5688 (dockerd)
    Tasks: 7
   Memory: 30.0M
   CGroup: system.slice/docker.service
           └─5688 usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock


2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.371959365+08:00" level=info msg="scheme \"unix\" not registered, fallback to def...dule=grpc
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.371974573+08:00" level=info msg="ccResolverWrapper: sending update to cc: {[{uni...dule=grpc
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.371981256+08:00" level=info msg="ClientConn switching balancer to \"pick_first\"...dule=grpc
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.404169481+08:00" level=info msg="Loading containers: start."
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.496148517+08:00" level=info msg="Default bridge (docker0) is assigned with an IP... address"
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.545353512+08:00" level=info msg="Loading containers: done."
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.559734496+08:00" level=info msg="Docker daemon" commit=459d0df graphdriver(s)=ov...=20.10.12
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.560072640+08:00" level=info msg="Daemon has completed initialization"
2月 08 15:37:14 localhost.localdomain systemd[1]: Started Docker Application Container Engine.
2月 08 15:37:14 localhost.localdomain dockerd[5688]: time="2022-02-08T15:37:14.588758976+08:00" level=info msg="API listen on var/run/docker.sock"
Hint: Some lines were ellipsized, use -l to show in full.
[yunweijia@localhost ~]$

[yunweijia@localhost ~]$ sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:507ecde44b8eb741278274653120c2bf793b174c06ff4eaa672b713b3263477b
Status: Downloaded newer image for hello-world:latest


Hello from Docker!
This message shows that your installation appears to be working correctly.


To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.


To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash


Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/


For more examples and ideas, visit:
 https://docs.docker.com/get-started/


[yunweijia@localhost ~]$