linux安装docker

安装环境

执行命令，查看linux的系统内核，并且根据linux内核下载对应版本docker 安装包

uname -r

下载地址

官方下载linux

官方其他版本

在线安装

• 查看是否安装docker

  yum list installed | grep docker
  

• 安装docker

  yum -y install docker
  

离线安装

1. 先下载对应安装包，解压

   tar -zxvf docker-20.10.19.tgz
   

2. 将解压内容复制到/usr/bin

   cp docker/* /usr/bin
   

3. 在/usr/lib/systemd/system目录下新增docker.service文件，并建立软连接，内容如下，注意：insecure-registry要改成自己的ip

   • 建立连接

     ln -s  '/usr/lib/systemd/system/docker.service'  '/etc/systemd/system/docker.service'  
     

   • 这个是麒麟系统的

     [Unit]
     Description=Docker Application Container Engine
     Documentation=https://docs.docker.com
     After=network-online.target firewalld.service
     Wants=network-online.target
     [Service]
     Type=notify
     ExecStart=/usr/bin/dockerd
     ExecReload=/bin/kill -s HUP $MAINPID
     LimitNOFILE=infinity
     LimitNPROC=infinity
     TimeoutStartSec=0
     Delegate=yes
     KillMode=process
     Restart=on-failure
     StartLimitBurst=3
     StartLimitInterval=60s
     [Install]
     WantedBy=multi-user.target
     

   • 这个是正常linux的文件内容

     [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 --selinux-enabled=false --insecure-registry=127.0.0.1
     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
     

4. 给docker.service添加权限

   chmod a+x /etc/systemd/system/docker.service
   

5. 重新加载配置文件

   systemctl daemon-reload  
   

6. 启动/重启/查看状态

   systemctl  start/stop/restart/status docker
   

7. 设置开机启动

   systemctl enable docker.service
   

使用docker

配置镜像下载地址

vi /etc/docker/daemon.json 
# 下面是镜像地址，配置这个，加快下载速度
{
  "registry-mirrors": [
    "https://registry.docker-cn.com",
    "http://hub-mirror.c.163.com",
    "https://docker.mirrors.ustc.edu.cn"
  ]
}