docker基础：私有仓库repository搭建（1）：registry

使用docker的login命令之后，可以使用push命令将镜像推送到dockerhub上，但是dockerhub毕竟在公网上，免费的帐户只有一个private 的repository是免费的，剩下的就都只能做成public的。由于种种限制，企业私有仓库的创建就有了各种应用场景。本文将从使用registry的方式简单介绍如何搭建私有的repository.

pull registry镜像

使用到的registry镜像

[root@liumiaocn ~]# docker search registry |head -n2
NAME                                      DESCRIPTION                                     STARS     OFFICIAL   AUTOMATED
registry                                  Containerized docker registry                   1123      [OK]
[root@liumiaocn ~]# docker pull registry
Using default tag: latest
latest: Pulling from library/registry
c0cb142e4345: Pull complete
a5002dfce871: Pull complete
df53ce740974: Pull complete
9ce080a7bfae: Pull complete
517dc3530502: Pull complete
Digest: sha256:1cfcd718fd8a49fec9ef16496940b962e30e3927012e851f99905db55f1f4199
Status: Downloaded newer image for registry:latest
[root@liumiaocn ~]#

docker run创建私有仓库

registry的介绍提到的最佳实践建议将registry作为容器运行起来。

[root@liumiaocn ~]# docker run -d -p 5000:5000 registry
badf822f34751979e4f7fc513b40177f941b227c7385245ad2f391737587b117
[root@liumiaocn ~]# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
badf822f3475        registry            "/entrypoint.sh /etc/"   3 seconds ago       Up 2 seconds        0.0.0.0:5000->5000/tcp   sharp_khorana
[root@liumiaocn ~]#

向私有仓库push一个镜像

准备：pull一个busybox

[root@liumiaocn ~]# docker pull busybox
Using default tag: latest
latest: Pulling from library/busybox
56bec22e3559: Pull complete
Digest: sha256:29f5d56d12684887bdfa50dcd29fc31eea4aaf4ad3bec43daf19026a7ce69912
Status: Downloaded newer image for busybox:latest
[root@liumiaocn ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
busybox             latest              e02e811dd08f        9 days ago          1.093 MB
registry            latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]#

准备：tag busybox

[root@liumiaocn ~]# docker tag busybox localhost:5000/busybox
[root@liumiaocn ~]# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
busybox                  latest              e02e811dd08f        9 days ago          1.093 MB
localhost:5000/busybox   latest              e02e811dd08f        9 days ago          1.093 MB
registry                 latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]#

push推送到私有仓库

[root@liumiaocn ~]# docker push localhost:5000/busybox
The push refers to a repository [localhost:5000/busybox]
e88b3f82283b: Pushed
latest: digest: sha256:29f5d56d12684887bdfa50dcd29fc31eea4aaf4ad3bec43daf19026a7ce69912 size: 527
[root@liumiaocn ~]#

结果确认

[root@liumiaocn ~]# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
busybox                  latest              e02e811dd08f        9 days ago          1.093 MB
localhost:5000/busybox   latest              e02e811dd08f        9 days ago          1.093 MB
registry                 latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]#

从私库中pull镜像

事前准备：将其他镜像都删除，以便确认该镜像确实是从私有仓库中pull出来的

[root@liumiaocn ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
registry            latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]#

pull 私库镜像

[root@liumiaocn ~]# docker pull localhost:5000/busybox
Using default tag: latest
latest: Pulling from busybox
56bec22e3559: Pull complete
Digest: sha256:29f5d56d12684887bdfa50dcd29fc31eea4aaf4ad3bec43daf19026a7ce69912
Status: Downloaded newer image for localhost:5000/busybox:latest
[root@liumiaocn ~]# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
localhost:5000/busybox   latest              e02e811dd08f        9 days ago          1.093 MB
registry                 latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]#

确认：

pull下来的image可以正常使用

[root@liumiaocn ~]# docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
localhost:5000/busybox   latest              e02e811dd08f        9 days ago          1.093 MB
registry                 latest              541a6732eadb        3 weeks ago         33.27 MB
[root@liumiaocn ~]# docker run -it localhost:5000/busybox /bin/sh
/ # hostname
24976e98919e
/ #

registry可以用来创建私有仓库，但是其用户管理/图形界面等等方面的功能几乎没有，很不友好， 之前我们也介绍过habor，habor也是建立在registry基础之上的，在接下来的文章中我们会介绍一下如何使用habor。