PerconaServerMongoDBRestore: ERROR oplog no such file

[bwnuts]

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I am trying to configure MongoDB backup/restore using Percona Operator. Backups are being successfully uploaded to GCS:

Backups:
========
S3 us s3://https://storage.googleapis.com/mongodb-macpaw-staging-backup/test
  Snapshots:
    2024-08-01T10:23:21Z 26.75KB <logical> [restore_to_time: 2024-08-01T10:23:32Z]

When I try to create PerconaServerMongoDBRestore resource to restore DB from previously created backup I get an error:

Backups:
========
S3 us s3://https://storage.googleapis.com/mongodb-macpaw-staging-backup/test
  Snapshots:
    2024-08-01T10:23:21Z 26.75KB <logical> [ERROR: file "2024-08-01T10:23:21Z/test-rs1/oplog": no such file] [2024-08-01T10:23:36Z]

More about the problem

Expected Result:
It looks like restore process expects Oplog file to be named oplog and to be placed in the root directory of the bucket.

Actual Result:
Oplog file is stored under oplog directory: oplog/20240802113626-4.20240802113631-3.gz

Additional Information:
When I reupload oplog/20240802113626-4.20240802113631-3.gz file back into the bucket but with a different name - oplog, restore is succesfull.

Steps to reproduce

1. Cluster backup config:

backup:
    enabled: true
    image: perconalab/percona-server-mongodb-operator:main-backup
    serviceAccountName: <serviceAccountName>
    storages:
      gcs:
        type: s3
        s3:
          region: us
          credentialsSecret: <credentialsSecret>
          bucket: <bucket>
          endpointUrl: https://storage.googleapis.com
          prefix: <prefix>
    pitr:
      enabled: true
    tasks:
      - name: daily
        enabled: true
        schedule: "0 11 * * *"
        keep: 3
        storageName: gcs

2. PerconaServerMongoDBRestore manifest

apiVersion: psmdb.percona.com/v1
kind: PerconaServerMongoDBRestore
metadata:
  name: restore1
  namespace: mongodb
spec:
  clusterName: test
  backupName: cron-test-20240802124900-fjk52
  backupSource:
    type: physical
    destination: s3://<bucket>/<prefix>
    s3:
      region: us
      credentialsSecret: <credentialsSecret>
      bucket: <bucket>
      endpointUrl: https://storage.googleapis.com
      prefix: <prefix>

Versions

1. Kubernetes - 1.29 GKE
2. Operator - 1.5.0
3. Database - percona/percona-server-mongodb:6.0.5-4

Anything else?

No response

[spron-in]

For the sake of the community - we continue the discussion here: https://forums.percona.com/t/perconaservermongodbrestore-error-oplog-no-such-file/32064