无网络搭建docker环境

      由于公司在做一些私有云平台构建，所以会出现在没有网络的情况下搭建环境，经过测试整个流程可以进行搭建docker环境的。

无网络服务器安装docker

1. 先在本机下载docker离线包选择docker-18.06.1-ce.tgz https://download.docker.com/linux/static/stable/x86_64/

2. 使用rz将离线包上传到服务器上，tar -xvf docker-18.06.1-ce.tgz进行解压

3. 将解压的docker文件拷贝 cp docker/* /usr/bin/

4. 添加配置vim /etc/systemd/system/docker.service，配置如下：

   [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
   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
   

5. 文件进行添加权限，重载配置并启动docker
   ​ chmod +x /etc/systemd/system/docker.service #添加文件权限并启动docker
   ​ systemctl daemon-reload #重载unit配置文件
   ​ systemctl start docker #启动Docker
   ​ systemctl enable docker.service #设置开机自启

6. 验证docker启动状态
   ​ systemctl status docker #查看Docker状态

备注：在安装docker过程中，docker网桥会自动添加。如果启动异常，尝试手动添加网桥。
​       brctl addbr docker0 ip addr add 172.17.0.1/16 dev docker0 ip link set dev docker0 up systemctl restart docker