Trigger pipelines in Gitlab

The following post is example of how to activate and use Trigger pipeline by API the official documentation over here as it mentioned is can be use “to trigger a pipeline for a specific branch or tag”; for our example I use it to activate a pipeline into specific branch.

Steps:

repoA will be the main one where the pipeline trigger it will be activate

• From repoA go to Settings-CI/CD-Pipeline triggers
• Click on “add trigger” copy your token
• From repoB that will be our caller of the repoA pipeline create a variable where you can paste the token.
• Finally into your pipeline on repoB you can add something like below:

The best part is that you can reference to specific branch ref="<branch_name>".

trigger:
  # Trigger to <project> project ID: <> 
  before_script:
    - apt-get update
    - apt-get install -y curl
  script:
    - 'curl -X POST --fail -F token="$MY_TRIGGER_TOKEN" -F ref="<branch_name>" https://gitlab.<company>/api/v4/projects/<id>/trigger/pipeline'

NOTE: from my gitlab server my runners are ubuntu 16.

hope the above example can be useful.