容器技术之Docker私有镜像仓库docker-distribution

　在前边的博客中我们说到docker的架构由docker客户端、服务端以及仓库组成；docker仓库就是用来存放镜像的地方；其实docker registry我们理解为存放docker镜像仓库的仓库比较准确吧；因为docker的镜像仓库通常是把同一类的镜像用不同的版本来区别，而registry则是用来存放这些仓库的仓库；默认安装docker都是从dockerhub镜像仓库下载镜像；其实在生产环境中，我们很少去公有仓库上下载镜像，原因之一是公有仓库中的镜像在生产环境中使用，有些不适配，通常我们是去公有仓库下载基础镜像，然后基于基础镜像构建适合自己生产环境中的镜像；其次公有仓库镜像有很多都不是安全的镜像，这么说吧，我们不确定自己下载的镜像是否有后门，是否有挖矿代码，所以基于种种因素，我们还是有必要搭建自己私有的镜像仓库；今天我们就来聊一聊docker的私有镜像仓库的搭建；

　　1、查看docker-distribution包简介

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

[root@docker_registry ~]# yum info docker-distribution Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * base: mirrors.aliyun.com  * extras: mirrors.aliyun.com  * updates: mirrors.aliyun.com Available Packages Name        : docker-distribution Arch        : x86_64 Version     : 2.6.2 Release     : 2.git48294d9.el7 Size        : 3.5 M Repo        : extras/7/x86_64 Summary     : Docker toolset to pack, ship, store, and deliver content URL         : https://github.com/docker/distribution License     : ASL 2.0 Description : Docker toolset to pack, ship, store, and deliver content   [root@docker_registry ~]#

　　提示：docker-distribution这个包就是提供简单仓库服务软件实现；

　　2、安装docker-distribution

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

[root@docker_registry ~]# yum install -y docker-distribution Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * base: mirrors.aliyun.com  * extras: mirrors.aliyun.com  * updates: mirrors.aliyun.com Resolving Dependencies There are unfinished transactions remaining. You might consider running yum-complete-transaction, or "yum-complete-transaction --cleanup-only" and "yum history redo last", first to finish them. If those don't work you'll have to try removing/installing packages by hand (maybe package-cleanup can help). The program yum-complete-transaction is found in the yum-utils package. --> Running transaction check ---> Package docker-distribution.x86_64 0:2.6.2-2.git48294d9.el7 will be installed --> Finished Dependency Resolution   Dependencies Resolved   ===================================================================================================================  Package                         Arch               Version                               Repository          Size =================================================================================================================== Installing:  docker-distribution             x86_64             2.6.2-2.git48294d9.el7                extras             3.5 M   Transaction Summary =================================================================================================================== Install  1 Package   Total download size: 3.5 M Installed size: 12 M Downloading packages: docker-distribution-2.6.2-2.git48294d9.el7.x86_64.rpm                                       | 3.5 MB  00:00:03     Running transaction check Running transaction test Transaction test succeeded Running transaction   Installing : docker-distribution-2.6.2-2.git48294d9.el7.x86_64                                               1/1   Verifying  : docker-distribution-2.6.2-2.git48294d9.el7.x86_64                                               1/1   Installed:   docker-distribution.x86_64 0:2.6.2-2.git48294d9.el7                                                                Complete! [root@docker_registry ~]#