resolveMongoDBBackupSource folded two failure classes into one error return:
a transient API read error on the live PerconaServerMongoDBBackup CR (cache
not yet synced, apiserver hiccup) and the terminal no-restorable-destination
case. The RestoreJob caller turned every error into markRestoreJobFailed, so a
retryable read error failed a restore that would have succeeded on the next
reconcile. The backup path already treats the symmetric live-CR read error as
transient (return ctrl.Result{}, err).
Wrap the transient read error in a new errTransientRestoreSource sentinel and
requeue on it at the caller; only a genuinely unresolvable source stays
terminal. Adds a non-vacuous interceptor-driven test.
Addresses the MINOR robustness note from PR review.
Signed-off-by: Andrey Kolkov <androndo@gmail.com>
Andrey Kolkov
b30c7f4272