安装Docker及配置Docker开机自启动

安装Docker

  1. 下载docker包:
    下载地址
    本例下载docker-20.10.9.tgz

  2. 将文件上传到centos系统:
    可使用xftp直接上传或

    # 上传到Centos系统/data/目录
    scp docker-20.10.9.tgz root@ip地址:/data/
    
  3. 进入到data目录,解压docker包

    cd /data
    tar -zxvf docker-20.10.9.tgz
    
  4. 将解压缩出来的docker文件内容移动到/user/bin/目录下

    cp docker/* /usr/bin/
    
  5. 查看docker版本

    docker version
    
  6. 查看docker信息

    docker info
    

配置docker 开机自启动服务

  1. 添加docker.service文件

    vi /etc/systemd/system/docker.service
    

    按i插入模式,复制如下内容:

    [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
    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
    

    按esc退出insert模式,输入:wq退出编辑

  2. 添加文件可执行权限

    chmod +x /etc/systemd/system/docker.service
    
  3. 重新加载配置文件

    systemctl daemon-reload
    
  4. 启动docker

    systemctl start docker
    
  5. 查看docker启动状态

    systemctl status docker
    
  6. 查看启动容器

    docker ps
    
  7. 设置开机自启动

    systemctl enable docker.service
    
  8. 查看docker开机启动状态 enabled:开启, disabled:关闭

    systemctl is-enabled docker.service
    

    在这里插入图片描述

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