离线安装

1.下载docker官方离线包

在有外网的环境中先把离线包下载下来
安装包官方地址：https://download.docker.com/linux/static/stable/x86_64/

2.上传离线包到服务器

使用rz命令或ftp工具将下载下来的离线包上传到指定服务器上

3.离线包解压

tar -zxvf docker-20.10.8.tgz

4.复制解压文件到/usr/bin/下

sudo cp docker/* /usr/bin/

5.注册docker为service服务

默认docker的存储路径为/data/docker0
如需修改请修改docker.service
ExecStart=/usr/bin/dockerd --graph=/data/docker0

在/etc/systemd/system/目录下新增docker.service文件

# sudo vi /etc/systemd/system/docker.service

输入内容
[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
# 如果有搭建私有镜像仓库，--insecure-registry设置为私有镜像仓库地址。
ExecStart=/usr/bin/dockerd --graph /home/docker0
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

6.启动docker服务

赋予docker.service 执行权限

chmod +x /etc/systemd/system/docker.service

重载配置文件以生效

systemctl daemon-reload

启动

sudo systemctl start docker

设置服务开机自启

sudo systemctl enable docker.service

查看服务状态

systemctl status docker

普通用户执行dockers命令

用户组配置文件：/ect/group 即用户组的所有信息都存放在此文件中。

新建用户组 docker，如果用户组已经存在则跳过

sudo groupadd docker

将 appuser用户添加到 docker 组

gpasswd -a appuser docker

更新用户组

newgrp docker

修改docker.sock用户组权限

chown root:docker /var/run/docker.sock

切换普通用户，验证docker命令是否能执行

su - admin
docker version

一键部署

将下载好的包，上传到服务器后，执行命令即可

docker安装包：Docker-install.tar.gz

# tar -zxf Docker-install.tar.gz
# cd Docker-install

# ./install.sh  docker-20.10.8.tgz 
解压tar包...
docker/
docker/docker-proxy
docker/containerd
docker/dockerd
docker/docker
docker/containerd-shim-runc-v2
docker/ctr
docker/docker-init
docker/runc
docker/containerd-shim
将docker目录移到/usr/bin目录下...
将docker.service 移到/etc/systemd/system/ 目录...
添加文件权限...
重新加载配置文件...
启动docker...
设置开机自启...
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /etc/systemd/system/docker.service.
docker安装成功...
Docker version 20.10.8, build 3967b7d
Docker Compose version v2.11.0