Details
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Sub-task
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Status: Resolved
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Trivial
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Resolution: Fixed
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3.3.0
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None
Description
From Spark32 . as a part of https://github.com/apache/spark/pull/32288 , functionality is added to delete PVC if the Spark driver died.
However there are cases , where spark on K8s doesn't use PVC and use host path for storage.
https://spark.apache.org/docs/latest/running-on-kubernetes.html#using-kubernetes-volumes
Now in those cases ,
- it request to delete PVC (which is not required) .
- It also tries to delete in the case where driver doesn't own the PV (or spark.kubernetes.driver.ownPersistentVolumeClaim is false)
- Moreover in the cluster , where Spark user doesn't have access to list or delete PVC , it throws exception .
io.fabric8.kubernetes.client.KubernetesClientException: Failure executing: GET at: https://kubernetes.default.svc/api/v1/namespaces/<>/persistentvolumeclaims?labelSelector=spark-app-selector%3Dspark-332bd09284b3442f8a6a214fabcd6ab1. Message: Forbidden!Configured service account doesn't have access. Service account may have been revoked. persistentvolumeclaims is forbidden: User "system:serviceaccount:dpi-dev:spark" cannot list resource "persistentvolumeclaims" in API group "" in the namespace "<>".
Solution
Ideally there should be configuration spark.kubernetes.driver.pvc.deleteOnTermination or use spark.kubernetes.driver.ownPersistentVolumeClaim which should be checked before calling to delete PVC. If user have not set up PV or if the driver doesn't own then there is no need to call the api and delete PVC .
