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离线安装 docker（本方法适用于国产操作系统银河麒麟 V10）
本文提供的是 docker 19.03.0 版本，如需其他版本请跳转至下载
https://www.freesion.com/article/16791105612/
1. 将 docker 离线包传输至目标 linux 系统
2. 在 docker 离线包目录执行 tar -xvf docker-*.tgz
3. 将解压出的所有文件移动至/usr/bin/
4. 创建 dockers.service 文件，路径为/etc/systemd/system/docker.service
5. 赋予 dockers.service 文件具有可执行权限：chmod +x
/etc/systemd/system/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
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
