内网环境安装Docker

1. 下载 Docker
   https://download.docker.com/linux/static/stable/x86_64/
2. 解压压缩文件

tar -zxvf docker-19.03.8.tgz

3. 将解压好的 Docker 文件复制到 /usr/bin 目录下

cp docker/* /usr/bin/

4. 在 /etc/systemd/system/ 目录下新增 docker.service 文件，将 docker 注册为服务，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 --insecure-registry=127.0.0.1
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

此处的--insecure-registry=127.0.0.1（此处改成你私服ip）设置是针对有搭建了自己私服Harbor时允许docker进行不安全的访问，否则访问将会被拒绝。

5. 启动 docker

• 为 docker.service 文件添加执行权限

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

• 重新加载配置文件

systemctl daemon-reload

• 启动

systemctl start docker

• 设置开机启动

systemctl enable docker.service

• 查看 docker 服务状态

systemctl status docker