centos7.8离线安装docker-20.10.8

本文档详细介绍了如何在CentOS系统中下载、上传、解压Docker 20.10.8版本,并将其安装到/usr/bin/目录下。接着,通过创建并配置docker.service文件,设置Docker开机启动,最后检查Docker的状态和运行的容器。这是一个完整的Docker安装流程,适合系统管理员参考。

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#下载docker-20.10.8包
https://download.docker.com/linux/static/stable/x86_64/docker-20.10.8.tgz

#上传到Centos系统/home/目录,如
scp docker-20.10.8.tgz root@192.168.0.5:/home/

#进入home目录,解压docker包
cd /home
tar -zxvf docker-20.10.8.tgz

#将解压出来的docker文件内容移动到 /usr/bin/ 目录下
cp docker/* /usr/bin/

#查看docker版本
docker version

#查看docker信息
docker info

 

#添加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

#添加文件可执行权限
chmod +x /etc/systemd/system/docker.service

#重新加载配置文件
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:关闭
systemctl is-enabled docker.service

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