1.部署环境：centos7.5
2.关闭selinux：设置/etc/selinux/config
3.docker下载：https://download.docker.com/linux/static/stable/x86_64/
选择docker-19.03.5.taz
4.安装：
（1）解压及拷贝
tar zxvf docker-19.03.5.tgz
cd docker
\cp -rf * /usr/bin/ #docker目录是二进制文件 全部拷贝到/usr/bin
（2）配置docker开机启动
touch /etc/systemd/system/docker.service
touch /etc/systemd/system/docker.socket
chmod 777 /etc/systemd/system/docker.service
chmod 777 /etc/systemd/system/docker.socket
docker.service:
vim 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
docker.socket:
[Unit]
Description=Docker Socket for the API
PartOf=docker.service
[Socket]
# If /var/run is not implemented as a symlink to /run, you may need to
# specify ListenStream=/var/run/docker.sock instead.
ListenStream=/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
保存上述两个文件后执行：
systemctl enable docker
systemctl start docker