(Feel free to update this bug's summary to be more specific.)
Component Readiness has found a potential regression in the following test:

install should succeed: overall

Significant regression detected.
Fishers Exact probability of a regression: 99.99%.
Test pass rate dropped from 100.00% to 93.48%.

Sample (being evaluated) Release: 4.19
Start Time: 2025-05-05T00:00:00Z
End Time: 2025-05-12T08:00:00Z
Success Rate: 93.48%
Successes: 43
Failures: 3
Flakes: 0

Base (historical) Release: 4.18
Start Time: 2025-01-26T00:00:00Z
End Time: 2025-02-25T23:59:59Z
Success Rate: 100.00%
Successes: 152
Failures: 0
Flakes: 0

View the test details report for additional context.

Metal installs appear to have several problems with now, but this specific bug is for those failing with

"msg": "Failed to download metadata for repo 'epel': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried",

On any repo.

Unclear what if anything can be done about this. If nothing else this bug gives us a place to triage regressions to.

Job runs can be found for last two days with: https://search.dptools.openshift.org/?search=All+mirrors+were+tried&maxAge=48h&context=1&type=build-log&name=metal&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job