麒麟服务器操作系统离线安装docker

1.准备离线安装包
 离线安装包下现在地址：https://download.docker.com/linux/static/stable/
2、解压后将目录里所有的命令文件复制到/usr/bin

cp docker/* /usr/bin

3、新建docker.service文件

vim /etc/systemd/system/docker.service

内容如下：

[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 
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、赋于docker.service执行权限

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

5、重新加载 systemd 

systemctl daemon-reload

6、启动docker服务

systemctl start docker

7、配置为开机启动项

systemctl enable docker

以上操作完成后docker安装成功，如需迁移docker到非根节点下可进行如下操作。
以下操作是通过更换docker镜像路径软连接方式实现docker迁移到非根节点下：
1、停止docker服务

systemctl stop docker.service

2、创建迁移目录

mkdir 你需要迁移的目录

3、移动docker程序到自定义目录

mv /var/lib/docker/  你需要迁移的目录

4、创建软连接

ln -s /app/docker  /var/lib/docker 

5、启动docker服务成功后迁移成功

systemctl start docker.service