How to run a gitlab-ci.yml job only on a tagged branch?

This behavior will be introduced in version 12.

Open issue was recently update:

Jason Lenny @jlenny changed title from {-Update .gitlab-ci.yml to
support conjunction logic for build conditions-} to Conjunction logic
for build conditions MVC · 2 days ago

Jason Lenny @jlenny changed milestone to 12.0 · 2 days ago

(fingers crossed)

A solution is to use the except keyword to exclude all the branches, in conjunction with only to run on tags, in this way you run your pipeline only on tag in master branch:

  only:
    - tags
  except:
    - branches

I’m using version 11.3.4