gitlab: how to trigger a pipline in another project

Question

I have a gitlab repo MAIN, where I run a pipline.

I have another gitlab repo SUB. where I run another pipeline

Now I want to trigger the pipline in MAIN repo from the SUB

i.e whenever i commit any change in SUB it should trigger the pipeline in MAIN

How do I do that in the gitlab-ci.yml file of the SUB

Answer 1

trigger-main:
  trigger: group/MAIN

ref: Multi-project pipelines

Answer 2

You can use Pipelines API, for example :

curl --request POST \
     --form token=TOKEN \
     --form ref=main \
     "https://gitlab.example.com/api/v4/projects/9/trigger/pipeline"

You need an Authentication token

Answer 3

You want Pipeline Triggers:

• in MAIN, you add a new trigger
• in SUB, you trigger the pipeline in MAIN