下载 Docker 并装置
docker 包下载地址
# 下载 docker-20.10.0 包
https://download.docker.com/linux/static/stable/x86_64/docker-20.10.0.tgz
#上传到 Centos 零碎 /data/ 目录, 如
scp docker-20.10.0.tgz root@192.168.0.5:/data/
#进入 data 目录, 解压 docker 包
cd /data
tar -zxvf docker-20.10.0.tgz
#将解压进去的 docker 文件内容挪动到 /usr/bin/ 目录下
cp docker/* /usr/bin/
#查看 docker 版本
docker version
#查看 docker 信息
docker info配置 Docker 开机自启动服务
# 增加 docker.service 文件
vi /etc/systemd/system/docker.service
#按 i 插入模式, 复制如下内容:[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# 增加文件可执行权限
chmod +x /etc/systemd/system/docker.service
#从新加载配置文件
systemctl daemon-reload
#启动 Docker
systemctl start docker
#查看 docker 启动状态
systemctl status docker
#查看启动容器
docker ps
#设置开机自启动
systemctl enable docker.service
#查看 docker 开机启动状态 enabled: 开启, disabled: 敞开
systemctl is-enabled docker.service