docker 离线使用

离线安装Docker

官网下载离线安装包

上传至服务器目录并解压

$  tar -xvf docker-19.03.6.tar
$  cp docker/* /usr/bin/ # 复制到该目录

注册docker服务

在/etc/systemd/system下创建docker.service服务,并配置以下内容保存

[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

配置文件权限

chmod +x /etc/systemd/system/docker.service                
systemctl daemon-reload                                                       
systemctl start docker                                                            
systemctl enable docker.service   

验证docker是否安装成功

systemctl status docker                                                        
docker -v   

报错docker命令找不到

报错的原因是因为手动安装的没有将docker配置到系统环境变量中

$  vim /etc/profile 
   # 写入以下内容 export PATH=$PATH:/usr/bin/docker/
$ source /etc/profile #使配置生效

导出已有容器

将已有容器打包成镜像并导出

$  docker commit container__id mynewimage

$  docker save mynewimage > /tmp/mynewimage.tar

复制到另一台安装好docker的服务器，执行下面的命令

$  docker load < /tmp/mynewimage.tar

创建mysql服务

$  docker run --privileged=true --restart always -itd --name mysql -p 3306:3306 -e MYSQL_ROOT_PASSWORD=123456 -v /opt/docker_v/mysql/data:/var/lib/mysql  mysql

创建redis服务

$   docker run -itd --name redis-test -p 6379:6379 redis

Docker 常用命令

查看容器挂载目录

 docker inspect container_name | grep Mounts -A 20