docker安装

docker安装文档地址

https://docs.docker.com/engine/install/centos/

安装步骤

1. 卸载已安装的docker

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

2.安装yum-install包

yum install -y yum-utils

3. 添加镜像下载地址，使用的是阿里云

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

4. 安装docker引擎

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

5.启动docker

systemctl start docker

6.检测docker是否安装成功

docker run hello-world

[root@bogon ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete
Digest: sha256:f861ba8563637d693e3043069b0a4ebf3d92c2e865b541379f6a6b8164b7c8bb
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/
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