安装配置要求

系统要求

1. centos7 (不支持或测试存档版本)
2. 必须启用centos-extras存储库
3. 建议使用overlay2存储驱动程序

安装

一、卸载旧版本

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

出现No Packages marked for removal也是正常的，说明没有安装过docker或者docker-engine(老版本的叫法)

二、使用yum安装

1. 安装依赖包

$ sudo yum install -y yum-utils

2. 设置镜像源(推荐清华源) 二选一

#清华源
$ sudo yum-config-manager \
    --add-repo \
    https://mirrors.ustc.edu.cn/docker-ce/linux/centos/docker-ce.repo
#官方源
$ sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo

3. 安装

   a.最新稳定版

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

b.手动选择版本安装

#查看列表
$ yum list docker-ce --showduplicates | sort -r
docker-ce.x86_64  3:18.09.1-3.el7                     docker-ce-stable
docker-ce.x86_64  3:18.09.0-3.el7                     docker-ce-stable
docker-ce.x86_64  18.06.1.ce-3.el7                    docker-ce-stable
docker-ce.x86_64  18.06.0.ce-3.el7                    docker-ce-stable
#版本号选择为:开头，-线之前 例:docker-ce-18.09.1
$ sudo yum install docker-ce-<VERSION_STRING> docker-ce-cli-<VERSION_STRING> containerd.io

4. 启动

   $ sudo systemctl start docker
   

5. 通过hello-world镜像测试docker已经成功安装并且可以运行

$ sudo docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
0e03bdcc26d7: Pull complete 
Digest: sha256:8c5aeeb6a5f3ba4883347d3747a7249f491766ca1caa47e5da5dfcf6b9b717c0
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.

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/