Run a manual job from a multi-project pipeline

Question

I have a pipeline that contains only manual jobs. Is it possible from within a multi-project pipeline to trigger this pipeline and tell it to run only some specific jobs? Like it would mimic a manual trigger.

Example:

My .gitlab-ci.yml (in myProject/Foo) file would look like this:

...

deploy_to_Production:
 <<: *job_deploy_definition
 stage: deploy
 when: manual
 variables:
    ENV: "Prod"
 only:
   refs:
     - tags

deploy_to_Integration:
 <<: *job_deploy_definition
 stage: deploy
 when: manual
 variables:
    ENV: "Int"

From the .gitlab-ci.yml file on my multi-project pipeline, I would like to trigger only one specific job:

...
production_deploy:
    stage: deploy
    trigger:
        project: myProject/Foo:deployToProduction # Is something like this possible ???
        #strategy: depend

Answer 1

If it's only deploy_to_Production that you want to trigger from that pipeline, you can split the job up slightly and use rules.

The trigger pipeline:

production_deploy:
  stage: deploy
  variables:
    DEPLOY_TO_PROD: true
  trigger:
    project: myProject/Foo
    #strategy: depend

another trigger pipeline:

integration_deploy:
  stage: deploy
  variables:
    DEPLOY_TO_INTEGRATION: true
  trigger:
    project: myProject/Foo
    #strategy: depend

myProject/Foo:

.deploy_to_Production:template:
 <<: *job_deploy_definition
 stage: deploy
 variables:
    ENV: "Prod"

deploy_to_Production:manual:
 extends: .deploy_to_Production:template
 rules:
   - if: $CI_COMMIT_TAG
     when: manual

deploy_to_Production:triggered:
 extends: .deploy_to_Production:template
 rules:
   - if: '$DEPLOY_TO_PROD == "true" && $CI_JOB_TRIGGERED == "true"'

.deploy_to_Integration:template:
 <<: *job_deploy_definition
 stage: deploy
 variables:
    ENV: "Int"

deploy_to_Integration:manual:
 extends: .deploy_to_Integration:template
 when: manual

deploy_to_Integration:triggered:
 extends: .deploy_to_Integration:template
 rules:
   - if: '$DEPLOY_TO_INTEGRATION == "true" && $CI_JOB_TRIGGERED == "true"'