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Docker-Centos安装

Centos是否符合条件

查看Centos版本号

Docker-Centos安装需求：7或8

[root@VM_0_8_centos ~]# uname -a
Linux VM_0_8_centos 3.10.0-514.21.1.el7.x86_64 #1 SMP Thu May 25 17:04:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
#Linux 					内核名称
#VM_0_8_centos 			网络节点主机名称
#3.10.0-154.21.1.el7.x86_64 内核Release	
#						内核Release详解
#						主版本号  3
#						次版本号  10[奇数表示开发版 偶数表示稳定版]
#						修订号    0 [修订次数]
#						此次版本第N次修改:154
#						el7:	  RedHat Enterprise Linux 7
#						x86_64   编译框架
#
##1 SMP Thu May 25 17:04:51 UTC 2017 内核版本
#x86_64 				机器名称
#x86_64					处理器名称
#x86_64					硬件平台名称
#GNU/Linux				操作系统名称

卸载旧版本Docker

[root@VM_0_8_centos ~]# yum remove docker \docker-client \docker-client-latest \docker-common \docker-latest \docker-latest-logrotate \docker-logrotate \docker-engine
Failed to set locale, defaulting to C
Loaded plugins: fastestmirror, langpacks
Repodata is over 2 weeks old. Install yum-cron? Or run: yum makecache fast
No Match for argument: docker
No Match for argument: docker-client
No Match for argument: docker-client-latest
No Match for argument: docker-common
No Match for argument: docker-latest
No Match for argument: docker-latest-logrotate
No Match for argument: docker-logrotate
No Match for argument: docker-engine
No Packages marked for removal

安装软件包

#安装yum-utils(提供yum-config-manager实用程序)
[root@VM_0_8_centos ~]# yum install -y yum-utils

设置存储库

#设置稳定存储库(官方)
[root@VM_0_8_centos ~]#  yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
#阿里云国内镜像
[root@VM_0_8_centos ~]#  yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

安装Docker 引擎

# docker-ce 社区版 docker-ee 
[root@VM_0_8_centos ~]# yum install docker-ce docker-ce-cli containerd.io

启动Docker

[root@VM_0_8_centos ~]# systemctl start docker

启动测试用例

[root@VM_0_8_centos ~]#  docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
0e03bdcc26d7: Pull complete
Digest: sha256:1a523af650137b8accdaed439c17d684df61ee4d74feac151b5b337bd29e7eec
Status: Downloaded newer image for hello-world:latestHello 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 theexecutable that produces the output you are currently reading.4. The Docker daemon streamed that output to the Docker client, which sent itto your terminal.To try something more ambitious, you can run an Ubuntu container with:$ docker run -it ubuntu bashShare 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/

查看镜像

[root@VM_0_8_centos ~]# docker images
REPOSITORY    TAG       IMAGE ID       CREATED         SIZE
hello-world   latest    bf756fb1ae65   12 months ago   13.3kB

卸载Docker

[root@VM_0_8_centos ~]yum remove docker-ce docker-ce-cli containerd.io
[root@VM_0_8_centos ~]rm -rf /var/lib/docker
#/var/lib/docker  Docker 默认工作路径