参考官方资料https://docs.docker.com/engine/install/centos/

一、删除旧版本的docker镜像

[root@docker ~]# yum remove docker
docker-client
docker-client-latest
docker-common
docker-latest
docker-latest-logrotate
docker-logrotate
docker-engine

二、安装依赖

yum install -y yum-utils

三、设置阿里云镜像仓库（推荐）

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

四、更新yum软件包索引

[root@docker ~]# yum makecache fast
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• base: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  base | 3.6 kB >00:00:00
  docker-ce-stable | 3.5 kB 00:00:00
  extras | 2.9 kB 00:00:00
  updates | 2.9 kB 00:00:00
  Metadata Cache Created

五、安装docker相关内容

yum install docker-ce docker-ce-cli containerd.io
[root@docker ~]# yum install docker-ce docker-ce-cli containerd.io
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• base: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package 3:docker-ce-19.03.12-3.el7.x86_64 already installed and latest version
  Package 1:docker-ce-cli-19.03.12-3.el7.x86_64 already installed and latest version
  Package containerd.io-1.2.13-3.2.el7.x86_64 already installed and latest version

docker-ce社区版 docker-ee企业版

六、启动docker

[root@docker ~]# systemctl start docker
[root@docker ~]# docker version
Client: Docker Engine - Community
Version: 19.03.12
API version: 1.40
Go version: go1.13.10
Git commit: 48a66213fe
Built: Mon Jun 22 15:46:54 2020
OS/Arch: linux/amd64
Experimental: false
Server: Docker Engine - Community
Engine:
Version: 19.03.12
API version: 1.40 (minimum version 1.12)
Go version: go1.13.10
Git commit: 48a66213fe
Built: Mon Jun 22 15:45:28 2020
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.2.13
GitCommit: 7ad184331fa3e55e52b890ea95e65ba581ae3429
runc:
Version: 1.0.0-rc10
GitCommit: dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
Version: 0.18.0
GitCommit: fec3683

七、docker run hello-world

[root@docker ~]# docker run hello-world
Unable to find image ‘hello-world:latest’ locally
latest: Pulling from library/hello-world
0e03bdcc26d7: Pull complete
Digest: sha256:49a1c8800c94df04e9658809b006fd8a686cab8028d33cfba2cc049724254202
Status: Downloaded newer image for hello-world:latest
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/

八、查看docker镜像

[root@docker ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest 08393e824c32 7 days ago 132MB
mysql latest 0d64f46acfd1 7 days ago 544MB
hello-world latest bf756fb1ae65 7 months ago 13.3kB
centos 7.5.1804 cf49811e3cdb 17 months ago 200MB

九、卸载docker

1、卸载依赖
yum remove docker-ce docker-ce-cli containerd.io
2、删除资源
rm -rf /var/lib/docker

十、阿里云镜像加速

> sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://vpfizz7e.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

注意英文字符