98 lines
4.5 KiB
Markdown
98 lines
4.5 KiB
Markdown
##私有仓库
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有时候使用Docker Hub这样的公共仓库可能不方便，用户可以创建一个本地仓库供私人使用。
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本节介绍如何使用本地仓库。
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docker-registry是官方提供的工具，可以用于构建私有的镜像仓库。
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###安装docker-registry
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#### 系统自带
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在安装了Docker后，系统中就自带了`docker-registry`工具，可以运行
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```
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docker run -p 5000:5000 registry
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```
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这将使用官方的registry镜像来启动本地的私有仓库。可以通过指定参数来配置私有仓库位置，例如配置镜像存储到Amazon的S3服务。
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```
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docker run \
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-e SETTINGS_FLAVOR=s3 \
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-e AWS_BUCKET=acme-docker \
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-e STORAGE_PATH=/registry \
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-e AWS_KEY=AKIAHSHB43HS3J92MXZ \
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-e AWS_SECRET=xdDowwlK7TJajV1Y7EoOZrmuPEJlHYcNP2k4j49T \
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-e SEARCH_BACKEND=sqlalchemy \
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-p 5000:5000 \
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registry
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````
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#### 源码安装
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从[docker-registry](https://github.com/docker/docker-registry)项目下载源码安装。
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```
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$ sudo apt-get install build-essential python-dev libevent-dev python-pip libssl-dev liblzma-dev libffi-dev
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$ sudo pip install .
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```
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然后修改配置文件，主要修改`storage_path`到本地的存储仓库的路径，之后启动Web服务。
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```
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$ cp config/config_sample.yml config/config.yml
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$ #do some change to config.yml
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$ sudo /usr/bin/gunicorn --debug -k gevent -b 0.0.0.0:5000 -w 8 docker_registry.wsgi:application
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```
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此时使用访问本地的5000端口，看到输出docker-registry的版本信息说明运行成功。
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*注：`config/config_sample.yml`文件是示例配置文件。
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###在私有仓库上传、下载、搜索镜像
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创建好私有仓库之后，就可以使用`docker tag`来标记一个镜像，然后推送它到仓库，别的机器上就可以下载下来了。例如私有仓库地址为`192.168.7.26:5000`。
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先在本机查看已有的镜像。
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```
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$ sudo docker images
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REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
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ubuntu latest ba5877dc9bec 6 weeks ago 192.7 MB
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ubuntu 14.04 ba5877dc9bec 6 weeks ago 192.7 MB
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```
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使用`docker tag`将ba58这个镜像标记为`192.168.7.26:5000/test`（格式为`docker tag IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]`）。
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```
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$ sudo docker tag ba58 192.168.7.26:5000/test
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root ~ # docker images
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REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
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ubuntu 14.04 ba5877dc9bec 6 weeks ago 192.7 MB
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ubuntu latest ba5877dc9bec 6 weeks ago 192.7 MB
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192.168.7.26:5000/test latest ba5877dc9bec 6 weeks ago 192.7 MB
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```
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使用`docker push`上传标记的镜像。
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```
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$ sudo docker push 192.168.7.26:5000/test
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The push refers to a repository [192.168.7.26:5000/test] (len: 1)
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Sending image list
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Pushing repository 192.168.7.26:5000/test (1 tags)
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Image 511136ea3c5a already pushed, skipping
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Image 9bad880da3d2 already pushed, skipping
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Image 25f11f5fb0cb already pushed, skipping
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Image ebc34468f71d already pushed, skipping
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Image 2318d26665ef already pushed, skipping
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Image ba5877dc9bec already pushed, skipping
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Pushing tag for rev [ba5877dc9bec] on {http://192.168.7.26:5000/v1/repositories/test/tags/latest}
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```
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用curl查看仓库中的镜像。
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```
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$ curl http://192.168.7.26:5000/v1/search
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{"num_results": 7, "query": "", "results": [{"description": "", "name": "library/miaxis_j2ee"}, {"description": "", "name": "library/tomcat"}, {"description": "", "name": "library/ubuntu"}, {"description": "", "name": "library/ubuntu_office"}, {"description": "", "name": "library/desktop_ubu"}, {"description": "", "name": "dockerfile/ubuntu"}, {"description": "", "name": "library/test"}]}
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```
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这里可以看到`{"description": "", "name": "library/test"}`，表明镜像已经被成功上传了。
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现在可以到另外一台机器去下载这个镜像
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```
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$ sudo docker pull 192.168.7.26:5000/test
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Pulling repository 192.168.7.26:5000/test
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ba5877dc9bec: Download complete
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511136ea3c5a: Download complete
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9bad880da3d2: Download complete
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25f11f5fb0cb: Download complete
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ebc34468f71d: Download complete
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2318d26665ef: Download complete
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$ sudo docker images
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REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE
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192.168.7.26:5000/test latest ba5877dc9bec 6 weeks ago 192.7 MB
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```
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