The log of repo maintain job is duplicated

[ywk253100]

kubectl -n velero logs default-default-kopia-lc27t-maintain-job-1714114635627-jt5z4
time="2024-04-26T06:57:17Z" level=warning msg="active indexes [xn0_12dfc3e75424a01cab1b6ec26878f577-s57f085408cc12f06128-c1 xn0_416b668dc4a94bb14424fb7bc8ec8bbf-sfdf1fbb94d9d45c5128-c1 xn0_889199a6d9ea6fec3d7226e3b7ee0701-s604d39cd255d8794128-c1 xn0_8ed7a31b860375390e311ce5702055d1-sa776db43884d05a8128-c1 xn0_ee310d060268fed439a131f5eee4baeb-sbaf9b9e2accb51ec128-c1] deletion watermark 0001-01-01 00:00:00 +0000 UTC" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:101" logger name="[index-blob-manager]" sublevel=error
time="2024-04-26T06:57:17Z" level=info msg="Start to open repo for maintenance, allow index write on load" logSource="pkg/repository/udmrepo/kopialib/lib_repo.go:165"
time="2024-04-26T06:57:17Z" level=warning msg="active indexes [xn0_12dfc3e75424a01cab1b6ec26878f577-s57f085408cc12f06128-c1 xn0_416b668dc4a94bb14424fb7bc8ec8bbf-sfdf1fbb94d9d45c5128-c1 xn0_889199a6d9ea6fec3d7226e3b7ee0701-s604d39cd255d8794128-c1 xn0_8ed7a31b860375390e311ce5702055d1-sa776db43884d05a8128-c1 xn0_ee310d060268fed439a131f5eee4baeb-sbaf9b9e2accb51ec128-c1] deletion watermark 0001-01-01 00:00:00 +0000 UTC" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:101" logger name="[index-blob-manager]" sublevel=error
time="2024-04-26T06:57:17Z" level=info msg="Succeeded to open repo for maintenance" logSource="pkg/repository/udmrepo/kopialib/lib_repo.go:172"
time="2024-04-26T06:57:17Z" level=info msg="Running full maintenance..." logModule=kopia/maintenance logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="Running full maintenance..." logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=warning msg="active indexes [xn0_12dfc3e75424a01cab1b6ec26878f577-s57f085408cc12f06128-c1 xn0_416b668dc4a94bb14424fb7bc8ec8bbf-sfdf1fbb94d9d45c5128-c1 xn0_889199a6d9ea6fec3d7226e3b7ee0701-s604d39cd255d8794128-c1 xn0_8ed7a31b860375390e311ce5702055d1-sa776db43884d05a8128-c1 xn0_ee310d060268fed439a131f5eee4baeb-sbaf9b9e2accb51ec128-c1] deletion watermark 0001-01-01 00:00:00 +0000 UTC" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:101" logger name="[index-blob-manager]" sublevel=error
time="2024-04-26T06:57:17Z" level=info msg="Looking for active contents..." logModule=kopia/snapshotgc logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="Looking for active contents..." logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="Looking for unreferenced contents..." logModule=kopia/snapshotgc logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="Looking for unreferenced contents..." logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 0 unused contents (0 B)" logModule=kopia/snapshotgc logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 0 unused contents (0 B)" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 0 unused contents that are too recent to delete (0 B)" logModule=kopia/snapshotgc logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 0 unused contents that are too recent to delete (0 B)" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 17 in-use contents (7.4 MB)" logModule=kopia/snapshotgc logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
time="2024-04-26T06:57:17Z" level=info msg="GC found 17 in-use contents (7.4 MB)" logModule=kopia/kopia/format logSource="pkg/kopia/kopia_log.go:94" logger name="[shared-manager]"
...

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[Lyndon-Li]

Kopia arrange logs by modules, logs from different modules could be written to different target.
Velero redirect Kopia logs from all modules to one destination.
There is a special case, logs for "Maintenance" module are also written to the the content module ("kopia/Format") after calling AlsoLogToCotentLog inside the maintenance operation. But the "Maintenance" logs before the call only exists in the "Maintenance" log.
As a result, in order to include all the logs for maintenance, we have to redirect all the "Maintenance" logs; in order to redirect logs for content, we have to redirect all the logs for "kopia/Format". Since there is an overlap after calling AlsoLogToCotentLog, there will be some duplicated logs for the maintenance job.