Docker安装

$ sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-engine

$ sudo yum install -y yum-utils \
  device-mapper-persistent-data \
  lvm2
$ sudo yum-config-manager \
    --add-repo \
    https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
$ sudo sed -i 's+download.docker.com+mirrors.aliyun.com/docker-ce+' /etc/yum.repos.d/docker-ce.repo
$ sudo yum makecache

$ sudo yum install docker-ce

$ yum list docker-ce --showduplicates | sort -r

$ sudo yum install docker-ce-18.09.8 docker-ce-cli-18.09.8 containerd.io

$ sudo systemctl start docker

$ sudo systemctl enable docker

$ sudo systemctl enable docker --now

$ sudo docker run hello-world

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

{
    "registry-mirrors": [
      "https://hub.uuuadc.top",
      "https://docker.anyhub.us.kg",
      "https://dockerhub.icu",
      "https://docker.awsl9527.cn",
      "https://docker.m.daocloud.io",
      "https://docker.gs"
    ]
}

$ sudo systemctl reload docker

$ sudo yum remove docker-ce
$ sudo yum autoremove

$ rm -rf /var/lib/docker