[GH Request] CI checks failing due to Dockerhub rate limiting

[bmtcril]

Firm Name

Axim

Urgency

Medium (< 2 weeks)

Problem/Request

From https://axim-collaborative.slack.com/archives/C12M8M5AR/p1736434755199059 :

Yesterday and today I've seen edx-platform CI checks failing intermittently with this error:
Unable to find image 'mongo:7.0' locally
7.0: Pulling from library/mongo
docker: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit.
Is this familiar to anyone? Wondering if we need to change something on the runners.

We should see if we can do something to cache / mirror our image pulls in CI, which may speed things up in addition to reducing our pull rates.

Reasoning

We'd like CI to pass reliably. :sli

[github-actions]

Thank you for your report! @openedx/axim-oncall will triage within a business day. Simple requests usually take 2-3 business days to resolve; more complex requests could take longer.

[bmtcril]

openedx/edx-platform#36089 is our best guess right now. Dockerhub seemed to be rate limiting us based on an unauthenticated threshold, so we're authenticating before the pull now. It doesn't seem to harm anything, if it lands I can monitor for those failures to see if it solves things.