A live backup drill on test-one failed: 'tar walk: open
/world/world/level.dat: permission denied'. The world volume belongs to
the game image's own UID (root for every Paper image we ship), and Paper
saves level.dat mode 0600 — a fixed uid-1000 executor can neither read
it (backup/reaper archive) nor overwrite it (restore). The same identity
silently broke on-demand backups, restores, and the reaper for every
server that had saved once.
Run the backup Job, restore Job, file Job, and the reaper pod as root
with DAC_OVERRIDE on top of drop-ALL — the same owner-matching precedent
as the operator's forwarding-init container; DAC_OVERRIDE extends it to
game images whose UID is neither root nor ours. FSGroup is omitted when
zero so a root executor never chgrps the world volume. Shape tests
updated for the new identity.
Live verification of the previous commit showed the immediate retry STILL
stranded: deleting a finished Job leaves it terminating (job-tracking
finalizer), so the re-Create collided with the dying object and was
mapped to ErrAlreadyExists a second time. Poll until the name actually
frees (bounded, ~10s) and surface a 'retry shortly' error if a stuck
finalizer ever outlives the budget. Fake-client tests pin both the
replace-finished and coalesce-in-flight branches.
An E2E audit on a live install found that a FAILED restore held its
deterministic Job name for the rest of the 10-minute TTL, so the next
restore answered 202 'restoring' while nothing ran (ErrAlreadyExists was
treated as success unconditionally). K8sJobs now inspects the colliding
Job: in-flight still coalesces, finished (succeeded or failed) is
deleted and replaced. The minecraft-namespace Role gains jobs:get/delete
for exactly that replacement.
The same audit found the backup Job mounts the felis-config Secret but
the installer only provisions it in the control namespace, so every
backup Job stranded on FailedMount. felis setup now replicates it into
the minecraft namespace beside the service-token and forwarding
secrets.
Lemon-miaow
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