centos7 下 docker-ce 搭建

官方地址

https://docs.docker.com/engine/installation/linux/docker-ce/centos/

1. 卸载旧版本

较老版本的 Docker 被称为 docker 或 docker-engine。如果这些已安装，请卸载它们以及关联的依赖关系。

yum remove docker docker-common docker-selinux docker-engine

2. 安装 Docker CE

使用存储库进行安装

安装所需的软件包 yum-utils 提供 yum-config-manager 实用程序和 device-mapper-persistent-data 和 lvm2 是必需的 devicemapper 存储驱动。

 yum install -y yum-utils device-mapper-persistent-data lvm2

使用下面的命令来设置稳定的存储库

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

3. 安装 DOCKER CE

更新 yum 包索引。

yum makecache fast

安装 Docker CE 的最新版本或下载指定的版本。

yum install docker-ce

启动 docker

 systemctl enable docker
 systemctl start docker

验证是否安装成功，运行 hello-world

docker run hello-world

查看结果

[root@docker ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
ca4f61b1923c: Pull complete 
Digest: sha256:97ce6fa4b6cdc0790cda65fe7290b74cfebd9fa0c9b8c38e979330d547d22ce1
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://cloud.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/engine/userguide/

[root@docker ~]#