【基础】linux系统上安装docker

1. 下载docker-ce的repo
curl https://download.docker.com/linux/centos/docker-ce.repo -o /etc/yum.repos.d/docker-ce.repo
2. 安装依赖
yum install https://download.docker.com/linux/fedora/30/x86_64/stable/Packages/containerd.io-1.2.6-3.3.fc30.x86_64.rpm
3. 安装docker-ce
问题：使用dnf -y  install docker-ce  docker-ce-cli --nobest命令安装会报错：
    https://download.docker.com/linux/centos/7/x86_64/stable/repodata/repomd.xml: [Errno 12] Timeout on https://download.docker.com/linux/centos/7/x86_64/stable/repodata/repomd.xml: (28, 'Operation timed out after 30002 milliseconds with 0 out of 0 bytes received')
Trying other mirror.

解决：参考https://blog.youkuaiyun.com/chendi19881217/article/details/104340310

问题： Waiting for process with pid 38001 to finish.

根据提示的意思：等待进程与pid 38001一起完成

解决：参考https://www.cnblogs.com/liuyakai/p/14769909.html

 问题：Problem 1: problem with installed package podman-3.0.1-6.module_el8.4.0+781+acf4c33b.x86_64

解决：参考资料内的第二种方式https://blog.youkuaiyun.com/ywyngq/article/details/118158608

4.启动 docker
systemctl start docker
5.查看 docker 版本信息
docker -v
6.设置开机自动启动

sudo systemctl start docker

sudo systemctl enable docker