重新构建在Docker容器中运行的Go（App Engine）应用程序？

Question

Normally, when you run a Go app using Go-Appengine's goapp serve command, file changes are detected and initiate a re-build.

INFO     2015-01-11 ... Detected file changes: ...

I'm currently experimenting with running Go-Appengine inside a docker container, and while the server starts appropriately, file changes do not initiate a re-build. How do I make this happen?

From my personal experience, Django projects running inside and outside docker containers behave the same way when file changes are detected.

Answer 1

I think the problem here is that the files don't change inside the docker-container, only on the host-filesystem. Your source-directory is added in the Dockerfile (when the container-image is built). If you change the files later, the container is not automatically rebuilt.

To solve this issue (for development-purposes) you could mount the source-directory from your host-system into the docker-container. with this trick, source-changes are automatically added to the container.

To to this, add

volumes:
  - .:/go/src