slavkap commented on PR #9270:
URL: https://github.com/apache/cloudstack/pull/9270#issuecomment-2751571735
@JoaoJandre, these are probably corner cases but:
delta max = 3
incremental snapshots = enabled
Case one:
1 - create 3 snapshots with copies to a second zone
2 - delete the first parent snapshot from the main zone
3 - copy again the snapshot from the second zone to the first
4 - try to delete any of the child snapshots or the parent from the first
zone
```
2025-03-25 09:46:24,873 DEBUG [o.a.c.s.s.SnapshotObject]
(API-Job-Executor-25:[ctx-a1686c7f, job-473, ctx-78ff04fd]) (logid:556be43c)
Found parent snapshot references [{"dataStoreId":1,"id":
59,"installPath":"snapshots\/2\/70\/2e5d8a05-aa60-485d-ad0d-dbc88ad94769","kvmCheckpointPath":null,"snapshotId":24,"state":"Ready"},
{"dataStoreId":2,"id":60,"installPath":"snapshots\/2\/70\/2e5d8a05-aa60-485d-ad0d-dbc88ad94769","kvmCheckpointPath":null,"snapshotId":24,"state":"Ready"}],
will filter to just one.
2025-03-25 09:46:24,874 ERROR [o.a.c.s.s.DefaultSnapshotStrategy]
(API-Job-Executor-25:[ctx-a1686c7f, job-473, ctx-78ff04fd]) (logid:556be43c)
Failed to delete snapshot [SnapshotTO[datastore=NfsTO
{"_role":"Image","_url":"nfs:\/\/10.2.128.5\/export\/secondary-a","nfsVersion":null,"uuid":null}|volume=volumeTO
{"dataStore":"PrimaryDataStoreTO
{\"id\":5,\"name\":\"nfs-a\",\"poolType\":\"NetworkFilesystem\",\"uuid\":\"7a2b426f-fd55-3d72-ad3c-3a3060d59623\"}","id":70,"name":"ROOT-53","path":"343a2776-7cd0-47ef-a43d-bbbe8a219086","uuid":"343a2776-7cd0-47ef-a43d-bbbe8a219086"}|pathsnapshots/2/70/2e5d8a05-aa60-485d-ad0d-dbc88ad94769]]
on storage [Image {uuid: "703a4f8c-1c8c-473a-aa8e-1fcf9308ba2b", name:
"secondary-a"}] due to [Could not find snapshot parent with id [24]. None of
the records have a checkpoint path.].
com.cloud.utils.exception.CloudRuntimeException: Could not find snapshot parent
with id [24]. None of the records have a checkpoint path.
at
org.apache.cloudstack.storage.snapshot.SnapshotObject.lambda$getCorrectIncrementalParent$1(SnapshotObject.java:145)
```
Case two:
1- take 3 snapshots with copies to a second zone
2 - delete the last snapshot (that is the end of the chain) from the first
zone
3 - copy the snapshot from the second zone to the first. The end of the
chain is lost for this snapshot and will be set to the next created one
Case three:
I cannot find this related to your PR, but I cannot create a volume from a
copied snapshot on another zone. I have tested this on another environment with
the main and it is working. The problem is that CS cannot find storage for the
new volume.
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