Automatic deployment of Google App Engine project with Gitlab Continuous Integration - https://medium.com/evenbit/an-easy-guide-to-automatically-deploy-your-google-app-engine-project-with-gitlab-ci-48cb84757125

.gitlab-ci.yml

image: python:2.7

before_script:
  - echo "deb http://packages.cloud.google.com/apt cloud-sdk-jessie main" | tee /etc/apt/sources.list.d/google-cloud-sdk.list
  - curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
  - apt-get update && apt-get install google-cloud-sdk

after_script:
  - rm /tmp/$CI_PIPELINE_ID.json

deploy_production:
  stage: deploy
  environment: Production
  only:
    - master
  script:
    - echo $DEPLOY_KEY_FILE_PRODUCTION > /tmp/$CI_PIPELINE_ID.json
    - gcloud auth activate-service-account --key-file /tmp/$CI_PIPELINE_ID.json
    - gcloud --quiet --project $PROJECT_ID_PRODUCTION app deploy

Quick notes after trying:

• there should be apt-get install -y google-cloud-sdk, otherwise build would stop
• before executing deploy, you should CD into the project directory, usually /builds/TEAM_NAME/PROJECT_NAME
• if you have flexible environment, at the current moment you would require following WA: gcloud config set app/use_deprecated_preparation True as provided here: GoogleCloudPlatform/getting-started-java#281
• if you had specified separate folder for app.yaml file, last command must be gcloud --your_custom_properties app deploy ./path/to/app.yaml

I just had to do the first change apt-get install -y google-cloud-sdk to get build to work.

For some reason I get:

Running after script...
$ rm /tmp/$CI_PIPELINE_ID.json
rm: cannot remove '/tmp/12345.json': No such file or directory
ERROR: Job failed: exit code 1

@bgold0, that's because the apt-get install step didn't work, so the job went from pre_script to post_script. As a result, the JSON file was never created so rm failed. If you use apt-get install -y it will be fixed. At any rate, if you don't want the rm bit to fail unnecessarily you can also change it to [ -e /tmp/$CI_PIPELINE_ID.json ] && rm /tmp/$CI_PIPELINE_ID.json.

@davux Thanks man, this seemed to work!

instead of using the before script to install the google-cloud-sdk, it's possible to use image: google/cloud-sdk if you're running this on gitlab.com