Stop scheduling mirror tests while building Docker images
The mirror tests start by build Docker images. Scheduling it at midnight will make it run at the same time as the job building the main Docker images. This mean they will fight for access to the Docker daemon and thus one of them is likely to fail.
Ideally, we would use the lockable resource plugin but as a stopgap measure, let’s schedule the mirror tests 4 hours after the main image building job.
Thanks vsellier for noting and olasd for investigating the issue.
Migrated from D8830 (view on Phabricator)