以下命令均以root許可權執行

解除安裝docker舊版本

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

安裝相關工具類

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

配置docker倉庫

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

會報以下錯誤

Loaded plugins: fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
Could not fetch/save url https://download.docker.com/linux/centos/docker-ce.repo to file /etc/yum.repos.d/docker-ce.repo
 

可以通過aliyun的源來搞定

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

出現以下內容則表示倉庫配置成功

Loaded plugins: fastestmirror
adding repo from: http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
grabbing file http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo
 

安裝docker

yum install docker-ce

如出現以下問題

Loaded plugins: fastestmirror
base
https://download-stage.docker.com/linux/centos/7/x86_64/stable/repodata/repomd.xml: [Errno 14] curl#35 - "TCP connection reset by peer"
Trying other mirror.
.............................

需要修改阿里的映象庫檔案庫檔案

vim /etc/yum.repos.d/docker-ce.repo

通過命令把 https://download-stage.docker.com 
替換為 http://mirrors.aliyun.com/docker-ce
命令如下：
:%s#https://download-stage.docker.com#http://mirrors.aliyun.com/docker-ce#g

在執行安裝docker , 可安裝成功

yum install docker-ce

Installed:
  docker-ce.x86_64 0:18.03.0.ce-1.el7.centos

Dependency Installed:
  audit-libs-python.x86_64 0:2.7.6-3.el7 checkpolicy.x86_64 0:2.5-4.el7   container-selinux.noarch 2:2.42-1.gitad8f0f7.el7 libcgroup.x86_64 0
  libtool-ltdl.x86_64 0:2.4.2-22.el7_3   pigz.x86_64 0:2.3.3-1.el7.centos policycoreutils-python.x86_64 0:2.5-17.1.el7     python-IPy.noarch

Complete!

驗證docker安裝成功

啟動docker

systemctl start docker

驗證docker

docker run hello-world

出現以下內容則表示安裝成功

Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
9bb5a5d4561a: Pull complete
Digest: sha256:f5233545e43561214ca4891fd1157e1c3c563316ed8e237750d59bde73361e77
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: