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Posted to issues@spark.apache.org by "pralabhkumar (Jira)" <ji...@apache.org> on 2022/08/03 05:13:00 UTC
[jira] [Commented] (SPARK-39965) Spark on K8s delete pvc even though it's not being used.
[ https://issues.apache.org/jira/browse/SPARK-39965?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574494#comment-17574494 ]
pralabhkumar commented on SPARK-39965:
--------------------------------------
Gentle ping @[dongjoon-hyun .|https://github.com/dongjoon-hyun]
> Spark on K8s delete pvc even though it's not being used.
> --------------------------------------------------------
>
> Key: SPARK-39965
> URL: https://issues.apache.org/jira/browse/SPARK-39965
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes
> Affects Versions: 3.3.0
> Reporter: pralabhkumar
> Priority: Minor
>
> From Spark32 . as a part of [https://github.com/apache/spark/pull/32288] , functionality is added to delete PVC if the Spark driver died.
> [https://github.com/apache/spark/blob/786a70e710369b195d7c117b33fe9983044014d6/resource-managers/kubernetes/core/src/main/scala/org/apache/spark/scheduler/cluster/k8s/KubernetesClusterSchedulerBackend.scala#L144]
>
> 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 even in those cases , it request to delete PVC (which is not required) . 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|https://kubernetes.default.svc/api/v1/namespaces/dpi-dev/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 Service account may have been revoked.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 "<>".
>
> Ideally there should be configuration spark.kubernetes.driver.pvc.deleteOnTermination which should be checked before calling to delete PVC. If user have not set up PV then there is no need to call the api and delete PVC .
>
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