centos离线部署docker

有些内部环境需要离线部署，以下做一些备忘。

环境：centos7.9

准备文件：

docker-20.10.9.tgz，下载地址 https://download.docker.com/linux/static/stable/x86_64/
docker.service，内容见下文
daemon.json，内容见下文
install.sh，内容见下文
docker-compose-linux-x86_64，按需，有需要docker-compose则安装，下载地址https://github.com/docker/compose/releases

以上5个文件都放在同一个目录下
注意：由于此次服务器挂载盘在 /data，所以把docker的存储目录放在 /data/docker 下，可以按需修改 install.sh 和 daemon.json

1.创建docker.service

通过 vi docker.service，将以下内容拷贝进去

bash 复制代码

[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

2.创建 daemon.json

通过 vi daemon.json ，将以下内容拷贝进去

bash 复制代码

{
	"iptables":false,
	"data-root":"/data/docker",
	"storage-driver":"overlay2",
	"log-level":"INFO",
	"log-driver":"json-file",
	"log-opts": {
		"max-size": "100m",
		"max-file":"5"
	},
	"registry-mirrors":["http://hub-mirror.c.163.com"]
}

3.创建 install.sh

通过 install.sh ，将以下内容拷贝进去

bash 复制代码

# install.sh
#!/bin/sh
echo '创建docker group'
groupadd docker
gpasswd -a root docker
# 还可以创建普通用户 lin 然后加入, useradd lin ; gpasswd -a lin docker
echo 'docker开始安装...'
echo '解压tar包...'
tar -xvf ./docker-20.10.9.tgz
chown root:docker docker/*
echo '将docker目录移到/usr/bin目录下...'
mv docker/* /usr/bin/
echo '将docker.service 移到/etc/systemd/system/ 目录...'
cp -f ./docker.service /etc/systemd/system
echo '添加文件权限...'
chmod +x /etc/systemd/system/docker.service

echo '创建docker root...'
# 这个目录根据自己修改，相应修改daemon.json的root属性
mkdir /data/docker
echo '创建docker daemon.json ...'
mkdir /etc/docker
cp daemon.js /etc/docker/
echo '重新加载配置文件...'
systemctl daemon-reload
echo '设置开机自启...'
systemctl enable docker.service
echo '启动docker...'
systemctl start docker
if ! docker -v; then
echo "docker 安装失败..."
exit -1
fi
echo 'docker安装成功...'
echo '防火墙添加 masquerade'
# daemon.json 配置了iptables: false，所以增加masquerade，让容器可以访问外部
firewall-cmd --zone=public --add-masquerade --permanent
firewall-cmd --reload

# 按需安装docker-compose，不需要则不执行
echo '安装docker-compose...'
mv docker-compose-linux-x86_64 /usr/local/bin/docker-compose
echo '添加 docker-compose 执行权限...'
chmod +x /usr/local/bin/docker-compose
if ! docker-compose -v; then
echo "docker-compose 安装失败..."
exit -1
fi
echo 'docker-compose 安装成功...'

4.执行：

可以对着 install.sh 命令逐步执行，也可以直接执行install.sh，sh +x install

注意：以上执行都是用户root下，，如果是普通用户，则需加sudo，且有root权限