离线安装docker

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该博客介绍了如何在没有网络的情况下安装Docker。首先，从官方链接下载Docker的稳定版离线安装包并解压，然后将解压后的Docker文件复制到/usr/bin目录。接着，配置Docker为系统服务，编辑并更新systemd服务文件，设置启动参数。最后，使用systemctl命令使Docker开机启动。这个过程适用于需要在离线环境中部署Docker的场景。

离线安装docker

下载离线安装包

https://download.docker.com/linux/static/stable/x86_64/

选择docker-20.10.3版本
https://download.docker.com/linux/static/stable/x86_64/docker-20.10.3.tgz

解压安装包

tar -zxvf docker-20.10.3.tgz

将解压后的docker文件拷贝到/usr/bin

cp -p docker/* /usr/bin

将docker注册为系统服务

vi /usr/lib/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
#Requires=docker.socket containerd.service
  
[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
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

设置开机启动

 systemctl daemon-reload 
 systemctl start docker
 systemctl enable docker.service # 设置开机自启动