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August 28, 2019 15:26
…n of only the oldest backups when rotating When rotating backups based on a maximum number allowed, newer backups were being deleted when the number of digits in an etcd store revision increased. E.g., when "v99" became "v100", the newer "v100" backup was being deleted, because the "1" in "100" was sorted to come before the first "9" in "99". This new sorting method relies on the timestamp in each backup path, rather than the revision number. The reason the timestamp is given precedence over the revision when sorting is because the revision could potentially go backwards when an older backup is restored. See my comment in pkg/backup/util/util.go's SortableBackupPaths type for more details. Fixes coreos#2113
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(Copied from coreos#2116)
etcd-backup-operator: fixed sorting of etcd backups to ensure deletion of only the oldest backups when rotating
Issue: When rotating backups based on a maximum number allowed, newer backups were being deleted when the number of digits in an etcd store revision increased.
E.g., when "v99" became "v100", the newer "v100" backup was being deleted, because the "1" in "100" was sorted to come before the first "9" in "99".
Fix: This new sorting method relies on the timestamp in each backup path, rather than the revision number.
The reason the timestamp is given precedence over the revision when sorting is because the revision could potentially go backwards when an older backup is restored.
See my comment in pkg/backup/util/util.go's SortableBackupPaths type for more details.
Fixes coreos#2113