Docker 搭建本地Registry

Docker已经将Registry开源，Registry本身也是一个容器。

1. 修改配置/etc/docker/daemon.json，去掉docker默认的https的访问
   里面的内容是一个json对象,加上一项insecure-registries:

{
 "insecure-registries":["172.16.65.150:5000"],
 "registry-mirrors": ["http://2555a638.m.daocloud.io"]
}

2. 启动Registry容器

root@Docker001:~# docker run --name registry -d -p : -v /myregistry/:/var/lib/registry registry:
Unable to find image 'registry:2' locally
: Pulling from library/registry
81033e7c1d6a: Pull complete
b235084c2315: Pull complete
c692f3a6894b: Pull complete
ba2177f3a70e: Pull complete
a8d793620947: Pull complete
Digest: sha256:6cd209f81e188e8eaa13fad9b670fb1a4e9c7776a73b3881b69834fe5ddfb193
Status: Downloaded newer image for registry:
385252aac02931701c4cae4233d1b12447b5b8b98ba6b337121d2f4a03e78709
root@Docker001:~# docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
385252aac029        registry:          "/entrypoint.sh /e..."    seconds ago       Up  seconds        0.0.0.0:->/tcp   registry

3. 测试Registry是否工作正常

root@Docker001:~# curl http://172.16.65.150:5000/v2/_catalog
{"repositories":[]}
root@Docker001:~# 

只要返回值为 {"repositories":[]} 表示工作正常。

4. 给本地Image打上本地Registry标签

root@Docker001:~# docker tag centos-with-vim 172.16.65.150:/centos-with-vim
root@Docker001:~# docker images
REPOSITORY                              TAG                 IMAGE ID            CREATED             SIZE
centos-with-vim                         latest              c00312958340         days ago           MB
172.16.65.150:/centos-with-vim      latest              c00312958340         days ago           MB
httpd                                   latest              01154c38b473         weeks ago          MB
debian                                  latest              1b3ec9d977fb         weeks ago          MB
registry                                                   d1fd7d86a825         weeks ago         33.3 MB
centos                                  latest              ff426288ea90         weeks ago          MB
hello-world                             latest              f2a91732366c         months ago        1.85 kB
vincenshen/hello-world                  v1                  f2a91732366c         months ago        1.85 kB
172.16.65.150:/hello-world          latest              f2a91732366c         months ago        1.85 kB
docker001:/vincenshen/hello-world   v1                  f2a91732366c         months ago        1.85 kB
django                                  latest              eb40dcf64078         months ago        MB
root@Docker001:~# 

在镜像的前面加上了运行 registry 的主机名称和端口。
镜像名称由 repository 和 tag 两部分组成。而 repository 的完整格式为：[registry-host]:[port]/[username]/xxx
只有 Docker Hub 上的镜像可以省略 [registry-host]:[port] 。

5. 上传Image到Registry

root@Docker001:~# docker push 172.16.65.150:/centos-with-vim
The push refers to a repository [172.16.65.150:/centos-with-vim]
b00cb99cc959: Pushed
e15afa4858b6: Pushed
latest: digest: sha256:cc103061080dde196f30aa3cb2a129a3be90dd882c0542f27d44509705802544 size: 

6. 查看Registry中的Image信息

root@Docker001:~# curl http://172.16.65.150:5000/v2/_catalog
{"repositories":["centos-with-vim"]}

root@Docker001:~# curl http://172.16.65.150:5000/v2/centos-with-vim/tags/list
{"name":"centos-with-vim","tags":["latest"]}

7. 删除Registry中的Image

删除镜像

docker exec <Registry-容器名> rm -rf /var/lib/registry/docker/registry/v2/repositories/<镜像名>

清理配置信息

 docker exec <Registry-容器名> bin/registry garbage-collect /etc/docker/registry/config.yml

更多详细配置https://docs.docker.com/registry/configuration