Docker 安装使用
1. 下载
下载地址：Index of linux/static/stable/x86_64/
下载好后，将文件docker-18.06.3-ce.tgz用WinSCP等工具，上传到不能外网的linux系统服务器
2. 安装
解压后的文件夹docker中文件如下所示：
将docker中的全部文件，使用下边命令，复制到/usr/bin
cp ./docker/* /usr/bin创建docker.service文件
cd /etc/systemd/system/
touch docker.service编辑docker.service文件
注意，将其中的ip地址，改成您的服务器地址，其它参数不用改。
--insecure-registry=192.168.205.230
[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=192.168.205.230
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添加可执行权限
chmod +x docker.service加载docker.service （注意，若修改了docker.service文件，则要重新加载该文件）
systemctl daemon-reload启动docker
systemctl status docker查看docker
设置开机自启动
systemctl enable docker.service