系统环境
cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
下载Docker安装包
可以按照自己的需要下载安装包，下载地址为：
https://download.docker.com/linux/static/stable/x86_64/
我这里的安装包为：https://download.docker.com/linux/static/stable/x86_64/docker-18.06.3-ce.tgz
上传解压
tar -xvf docker-18.06.3-ce.tgz
将解压出来的docker文件内容移动到 /usr/bin/ 目录下
cp docker/* /usr/bin/
将docker注册为service
vim /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
添加文件权限并启动docker
chmod +x /etc/systemd/system/docker.service
重载unit配置文件
systemctl daemon-reload
启动Docker
systemctl start docker
设置开机自动启动
systemctl enable docker.service
验证
#查看Docker状态
systemctl status docker
#查看Docker版本
docker version 或者 docker info
