1-docker安装

1.文档

https://docs.docker.com/engine/install/centos/
https://docs.docker.com/engine/install/linux-postinstall/

2.卸载旧版

 yum remove -y docker \
              docker-ce-cli \
              docker-client \
              docker-client-latest \
              docker-common \
              docker-latest \
              docker-latest-logrotate \
              docker-logrotate \
              docker-selinux \
              docker-engine-selinux \
              docker-engine \
              container*;

3.添加国内源

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

4.安装

yum install device-mapper-persistent-data lvm2 bash-completion

#根据自己需要指定版本安装，如果不指定则安装最新版本，如，yum install docker-ce
yum install docker-ce-20.10.15

#添加普通用户可以使用docker命令
useradd dev

usermod -aG docker dev

newgrp docker

yum remove docker docker-common docker-selinux docker-engine

5.修改存储配置路径

cat > /etc/docker/daemon.json <<EOF
{
  "exec-opts": [
  	"native.cgroupdriver=systemd"
  ],
  "max-concurrent-downloads": 10,
  "max-concurrent-uploads": 5,
  "live-restore":true,
  "log-driver": "json-file",
  "log-opts": {
  	"max-size": "100m",
	"max-file":"5"
  },
  "storage-driver": "overlay2",
  "storage-opts": [
  	"overlay2.override_kernel_check=true"
  ],
  "registry-mirrors" : [
  ],
  "graph": "/data/docker"
}
EOF

6.服务管理

systemctl daemon-reload
systemctl enable --now docker