Hands-On Docker for Microservices with Python

Tagging and pushing every commit

It is possible to push every single built image to the registry, identified by its Git SHA. This can be useful when work in progress can be shared for demo purposes, tests, and so on.

To do so, we need to create an environment variable with the Git SHA in the before_install section:

before_install:  ...  - export GIT_SHA=`git rev-parse --short HEAD`  - echo "Building commit $GIT_SHA"

The push section then adds the tag and push of the image:

- stage: push  script:  - cd Chapter04  - docker-compose build server  - docker tag thoughts_server:latest <registry>/thoughts-backend:$GIT_SHA  - docker push <registry>/thoughts-backend:$GIT_SHA  - docker tag thoughts_server:latest <registry>/thoughts-backend:$TRAVIS_BRANCH

As ...