如何防止Dockerfile缓存git克隆 [英] How to prevent Dockerfile caching git clone

问题描述

我有一个Docker文件尝试打包并部署一个Web应用程序到一个容器。在Docker图像构建期间，应用程序的代码从git存储库中获取。
这是Dockerfile快照：

  ........ 
 RUN git clone  - depth = 1 git-repository-url $ GIT_HOME / 
运行mvn包-Dmaven.test.skip 
 ........ 
  

我希望docker不缓存的步骤运行git clone --depth = 1 git-repository-url $ GIT_HOME / ，以便存储库上正在进行的更新可以反映在Docker映像构建中。

解决方案

另一个解决方法：

如果您使用github（或gitlab或bitbucket太可能），您可以将github API的代理代码添加到虚拟位置。

 添加https://api.github.com/repos/$USER/$REPO/git/refs/heads/$BRANCH version.json 
运行git clone -b $ BRANCH https：// github。 com / $ USER / $ REPO.git $ GIT_HOME / 
  

api调用将返回不同的结果，当如果您正在处理私人回扣，您可以使用

auth /＃basic-authenticationrel =nofollow noreferrer> github的 x-oauth-basic 认证方案，一个个人访问令牌，如下所示：

  ADD https：// $ ACCESS_TOKEN：x-oaut [e-mail]/repos/$USER/$REPO/git/refs/heads/$BRANCH version.json 
  

（thx @captnolimar为建议编辑以澄清身份验证）

I have a Dockerfile trying to package and deploy a web app to a container. The code of app fetches from git repository during Docker image building. Here's the Dockerfile snapshot:

........
RUN git clone --depth=1 git-repository-url $GIT_HOME/
RUN mvn package -Dmaven.test.skip
........

I want the docker do not cache the step of RUN git clone --depth=1 git-repository-url $GIT_HOME/ so that the on-going updated on the the repository can be reflected on the Docker image building. Is it possible to a achieve that?

解决方案

Another workaround:

If you use github (or gitlab or bitbucket too most likely) you can ADD the github API's representation of your repo to a dummy location.

   ADD https://api.github.com/repos/$USER/$REPO/git/refs/heads/$BRANCH version.json
   RUN git clone -b$BRANCH https://github.com/$USER/$REPO.git $GIT_HOME/

The api call will return different results when the head changes, invalidating docker's cache.

If you're dealing with private repos you can use github's x-oauth-basic authentication scheme with a personal access token like so:

   ADD https://$ACCESS_TOKEN:[e-mail]/repos/$USER/$REPO/git/refs/heads/$BRANCH version.json

(thx @captnolimar for a suggested edit to clarify authentication)

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