CentOS7离线安装Docker和卸载Docker步骤（亲测有效） 一、CentOS7离线安装 Docker 步骤1、docker 安装包下载地址https://download.docker.com/linux/static/stable/x86_64/2、将下载的 docker-18.06.3-ce.tgz 文件上传到 Centos7 服务器上（如上传到 /home/docker 目录下）,并执行 tar 命令解压，如下图：tar -zxvf docker-18.06.3-ce.tgz3、将/home/docker 目录下解压出来的所有 docker 文件复制到 /usr/bin/ 目录下cp docker/* /usr/bin/4、将 docker 注册为 service，进入/etc/systemd/system/目录,并创建 docker.service 文件cd /etc/systemd/system/touch docker.service5、编辑 docker.service 文件,将以下内容复制到 docker.service 文件中注：以下内容中 --insecure-registry=192.168.3.10 此处改为你自己服务器 ipvim docker.service[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=192.168.3.10 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.target6、给 docker.service 文件添加执行权限chmod 777 /etc/systemd/system/docker.service7、重新加载配置文件注：每次修改 docker.service 这个文件时都要重新加载下。systemctl daemon-reload8、启动 Docker 服务systemctl start docker9、设置开机启动 Docker 服务systemctl enable docker.service10、验证 docker 是否启动成功查看 Docker 状态，显示 active（running）表示启动成功systemctl status docker查看 Docker 版本docker -v11、配置镜像加速器,默认是到国外拉取镜像速度慢，如下图：编辑 /etc/docker/目录下的 daemon.json 文件，将以下内容复制到 daemon.json 文件中vim /etc/docker/daemon.json{"registry-mirrors": ["http://hub-mirror.c.163.com"]}重启 docker,使其 daemon.json 文件配置生效service docker restart二、CentOS7 离线卸载Docker步骤1、删除服务取消开机自启systemctl disable docker取消注册文件rm -rf /etc/systemd/system/docker.service2、删除命令rm -rf /usr/bin/containerd rm -rf /usr/bin/containerd-shim rm -rf /usr/bin/ctr rm -rf /usr/bin/runc rm -rf /usr/bin/docker*3、删除配置rm -rf /etc/docker/4、删除镜像或容器rm -rf /var/lib/docker