Add a Ruby version-specific cache key
What does this MR do?
When we started adding Ruby 3.0 builds for gitlab-org/gitlab#385509 (closed) (most likely in !1278 (merged)), I noticed the gitlab-rails-{ce,ee}
runner caches contained gems for both Ruby 2.7 and 3.0.
To ensure the images only contain the gem versions needed for the installed Ruby interpreter, add a cache key based on the minor version of Ruby.
Related issues
gitlab-org/gitlab#385509 (closed)
Checklist
See Definition of done.
For anything in this list which will not be completed, please provide a reason in the MR discussion
Required
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Merge Request Title, and Description are up to date, accurate, and descriptive -
MR targeting the appropriate branch -
MR has a green pipeline on GitLab.com
Expected (please provide an explanation if not completing)
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Test plan indicating conditions for success has been posted and passes -
Documentation created/updated -
Integration tests added to GitLab QA -
The impact any change in container size has should be evaluated
Edited by Stan Hu