前言
本文讲解搭建docker的私有仓库，和Mavan的管理一样，Dockers不仅提供了一个中央仓库，同时也允许我们使用registry搭建本地私有仓库
一、环境
| ip | 主机名 | 操作系统 | 角色 |
| 192.168.6.131 | node2.jacky.com | 7.3.1611 | 客户端 |
| 192.168.6.132 | node3.jacky.com | 7.3.1611 | 私有仓库 |
二、搭建
2.1、在132机器上下载registry镜像
docker pull registry
2.2、防火墙添加运行5000端口
iptables -I INPUT 1 -p tcp --dport 5000 -j ACCEPT
2.3、创建registry容器，并启动
docker run -d -p 5000:5000 --privileged=true -v /opt/registry:/tmp/registry registry
说明：
- 默认情况下，会将仓库存放于容器内的/tmp/registry目录下，这样如果容器被删除，则存放于容器中的镜像也会丢失，所以我们一般情况下会指定本地一个目录挂载到容器内的/opt/registry下
- –privileged=true ：CentOS7中的安全模块selinux把权限禁掉了，参数给容器加特权，不加上传镜像会报权限错误(OSError: [Errno 13] Permission denied: ‘/tmp/registry/repositories/liibrary’)或者（Received unexpected HTTP status: 500 Internal Server Error）错误
2.4、客户端修改/etc/sysconfig/docker文件，在后面追加，不加会报https证书错误，然后重启docker
OPTIONS='--insecure-registry 192.168.6.132:5000' #CentOS 7系统 other_args='--insecure-registry 192.168.6.132:5000' #CentOS 6系统
三、测试
3.1、把本地镜像jacky/mytomcat:1.0的tag
docker tag 3d95a80ccbda 192.168.6.132:5000/jacky/mytomcat:1.2
结果如下
注意：前缀一定要私有仓库Ip:端口/，否则上传会报错
3.2、上传镜像192.168.6.132:5000/jacky/mytomcat：1.2到私有仓库
docker push 192.168.6.132:5000/jacky/mytomcat:1.2
3.3、删除该镜像，然后重新下载该镜像
[root@node2 jacky]# docker rmi 192.168.6.132:5000/jacky/mytomcat:1.2 Untagged: 192.168.6.132:5000/jacky/mytomcat:1.2 Untagged: 192.168.6.132:5000/jacky/mytomcat@sha256:da9f7e620ade2c1fb3c4c516cf6c8303045699dba58759f4cf15408a2858228f [root@node2 jacky]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE jacky/mytomcat 1.0 3d95a80ccbda 6 days ago 655.3 MB jacky/mytomcat 1.1 3d95a80ccbda 6 days ago 655.3 MB jacky/ubuntu 14.05 ff41e3aca80b 7 days ago 209.1 MB jacky/ubuntu dev ff41e3aca80b 7 days ago 209.1 MB jacky/centos v3 67a8ec824059 7 days ago 326.3 MB jacky/ubuntu v2 9634808b727b 8 days ago 137.2 MB docker.io/nginx latest 40960efd7b8f 2 weeks ago 108.4 MB docker.io/ubuntu 14.04 3aa18c7568fc 2 weeks ago 188 MB docker.io/httpd latest 74ad7f48867f 2 weeks ago 177.3 MB docker.io/debian wheezy f47fe1c60a2f 2 weeks ago 85.13 MB docker.io/busybox latest 6ad733544a63 2 weeks ago 1.129 MB docker.io/centos 7.2.1511 0a2bad7da9b5 2 weeks ago 194.6 MB docker.io/ubuntu 15.10 9b9cb95443b5 16 months ago 137.2 MB [root@node2 jacky]# docker pull 192.168.6.132:5000/jacky/mytomcat:1.2 Trying to pull repository 192.168.6.132:5000/jacky/mytomcat ... sha256:da9f7e620ade2c1fb3c4c516cf6c8303045699dba58759f4cf15408a2858228f: Pulling from 192.168.6.132:5000/jacky/mytomcat Digest: sha256:da9f7e620ade2c1fb3c4c516cf6c8303045699dba58759f4cf15408a2858228f Status: Downloaded newer image for 192.168.6.132:5000/jacky/mytomcat:1.2 [root@node2 jacky]# docker images REPOSITORY TAG IMAGE ID CREATED SIZE 192.168.6.132:5000/jacky/mytomcat 1.2 3d95a80ccbda 6 days ago 655.3 MB jacky/mytomcat 1.0 3d95a80ccbda 6 days ago 655.3 MB jacky/mytomcat 1.1 3d95a80ccbda 6 days ago 655.3 MB jacky/ubuntu 14.05 ff41e3aca80b 7 days ago 209.1 MB jacky/ubuntu dev ff41e3aca80b 7 days ago 209.1 MB jacky/centos v3 67a8ec824059 7 days ago 326.3 MB jacky/ubuntu v2 9634808b727b 8 days ago 137.2 MB docker.io/nginx latest 40960efd7b8f 2 weeks ago 108.4 MB docker.io/ubuntu 14.04 3aa18c7568fc 2 weeks ago 188 MB docker.io/httpd latest 74ad7f48867f 2 weeks ago 177.3 MB docker.io/debian wheezy f47fe1c60a2f 2 weeks ago 85.13 MB docker.io/busybox latest 6ad733544a63 2 weeks ago 1.129 MB docker.io/centos 7.2.1511 0a2bad7da9b5 2 weeks ago 194.6 MB docker.io/ubuntu 15.10 9b9cb95443b5 16 months ago 137.2 MB [root@node2 jacky]#
可以看到，重新下载了
四、查询私有仓库镜像
在Private Registry2中查看或检索Repository或images，将不能用docker search，会报下边的错误
[root@node2 jacky]# docker search 192.168.6.132:5000/ Error response from daemon: Unexpected status code 404 [root@node2 jacky]# curl http://192.168.6.132:5000/v2/_catalog {"repositories":["jacky/mytomcat"]} [root@node2 jacky]# curl http://192.168.6.132:5000/v2/jacky/mytomcat/tags/list {"name":"jacky/mytomcat","tags":["1.2"]} [root@node2 jacky]#