Docker学习01：Centos7下安装Docker

安装Docker

1-查看Centos 版本：当前版本是Centos7.7，可采用当前方法

[root@ecs-x-large-2-linux-20200229160057 ~]# lsb_release -a
LSB Version:    :core-4.1-amd64:core-4.1-noarch
Distributor ID:    CentOS
Description:    CentOS Linux release 7.7.1908 (Core)
Release:    7.7.1908
Codename:    Core

2-yum安装gcc相关

[root@ecs-x-large-2-linux-20200229160057 ~]# yum -y install gcc
[root@ecs-x-large-2-linux-20200229160057 ~]# yum -y install gcc-c++

3-安装需要的软件包

[root@ecs-x-large-2-linux-20200229160057 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2

4-设置stable镜像仓库

[root@ecs-x-large-2-linux-20200229160057 ~]# yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
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

5-更新yum软件包索引

[root@ecs-x-large-2-linux-20200229160057 ~]# yum makecache fast

6-安装docker-ce

[root@ecs-x-large-2-linux-20200229160057 ~]# yum -y install docker-ce

7-启动docker

[root@ecs-x-large-2-linux-20200229160057 ~]# systemctl start docker

8-测试是否启动成功

[root@ecs-x-large-2-linux-20200229160057 ~]# docker version
Client: Docker Engine - Community
Version: 19.03.8
API version: 1.40
Go version: go1.12.17
Git commit: afacb8b
Built: Wed Mar 11 01:27:04 2020
OS/Arch: linux/amd64
Experimental: false

[root@ecs-x-large-2-linux-20200229160057 ~]# docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete 
Digest: sha256:f9dfddf63636d84ef479d645ab5885156ae030f611a56f3a7ac7f2fdd86d7e4e
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

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