1、离线安装

https://download.docker.com/linux/static/stable/x86_64/docker-20.10.6.tgz

说明，也可以从https://download.docker.com/linux/static/stable/网址下载指定版本

GitHub - Jrohy/docker-install: auto install latest docker by online/offline (binary install)

        说明: 将下载好的这个工具解压。

# 进入/root/setup/docker 文件夹
cd /root/setup/docker

# 为 install.sh添加执行权限
chmod +x install.sh

# 安装
./install.sh -f docker-20.10.6.tgz

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
docker 20.10.6 install success!

2、在线安装

sudo yum install -y yum-utils 

sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

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

sudo yum makecache fast #yum 是包管理器

sudo yum install -y docker-ce docker-ce-cli containerd.io

3、镜像加速

由于国内网络问题，需要配置加速器来加速。
修改配置文件 /etc/docker/daemon.json

下面命令直接生成文件 daemon.json

cat <<EOF > /etc/docker/daemon.json
{
  "registry-mirrors": [
    "https://docker.mirrors.ustc.edu.cn",
    "http://hub-mirror.c.163.com"
  ],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker"
}
EOF

# 重新加载docker配置
sudo systemctl daemon-reload

#重启docker服务
sudo systemctl restart docker

4、确认安装结果

docker info

systemctl status docker

systemctl stop docker

systemctl start docker

systemctl enable docker

systemctl disable docker

systemctl restart docker