test flakes tracker

[cgwalters]

CI Flakes Tracker

1. COPR repo unavailable

Error: Failed to download metadata for repo
'copr:copr.fedorainfracloud.org:group_CoreOS:continuous':
Cannot download repomd.xml: All mirrors were tried

The COPR continuous repo is transiently unavailable during the container build,
causing dnf to fail. Happens specifically on centos-10 jobs that pull from
the CoreOS COPR. Retry would likely succeed.

2. quay.io 502

Error:

error: Installing to filesystem: Creating ostree deployment: Pulling:
Importing: Unencapsulating base: failed to invoke method GetBlob:
fetching blob: received unexpected HTTP status: 502 Bad Gateway

The in-VM install test hit a transient 502 from the container registry while
pulling an image. Pure network flake.

3. GHA runner killed mid-TMT

Symptom: Job ran unit tests successfully, TMT step started but produced no
conclusion after 2h15m. No artifact uploaded. Run marked failed with no logged
error. Runner appears to have been killed externally (OOM or host issue).

4. test_container_write_derive assertion failure

Frequency: Once (fedora-44, ostree, xfs, grub, bls, unsealed — Unit and container integration tests)
Error:

assertion `left == right` failed
  left: "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 right: "newderivedfile v0"
at crates/ostree-ext/tests/it/main.rs:1713

File written into a derived container was read back as all null bytes. The same
test passed in fedora-43, ostree in the same queue batch. Likely a race
condition or tmpfs/storage timing issue on the fedora-44 runner; not seen
before or since.