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https://issues.apache.org/jira/browse/FLINK-39021?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-39021:
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Labels: pull-request-available (was: )
> Support native PersistentVolumeClaim (PVC) mounting for Kubernetes deployments
> ------------------------------------------------------------------------------
>
> Key: FLINK-39021
> URL: https://issues.apache.org/jira/browse/FLINK-39021
> Project: Flink
> Issue Type: Improvement
> Components: Deployment / Kubernetes
> Reporter: Liu
> Priority: Major
> Labels: pull-request-available
>
> h1. Motivation
> Currently, Flink on Kubernetes users who want to mount PersistentVolumeClaims
> (PVCs) to their JobManager and TaskManager pods have to use Pod Templates.
> While Pod Templates are flexible, they require users to maintain separate
> YAML files and understand Kubernetes Pod specification details, which
> increases operational complexity.
> This proposal introduces native configuration options for mounting PVCs
> directly through Flink configuration, providing a simpler and more intuitive
> way for users to attach persistent storage to their Flink clusters.
>
> h1. Use Cases
> # Checkpoint/Savepoint Storage: Mount a shared PVC for storing checkpoints
> and savepoints, enabling high availability and disaster recovery.
> # Shared Data Access: Mount read-only PVCs containing shared datasets or
> configuration files that multiple pods need to access.
> # Log Persistence: Mount PVCs to persist logs beyond pod lifecycle for
> debugging and auditing.
> # State Backend Storage: Use mounted PVCs as storage for RocksDB state
> backend in scenarios where local SSD is required.
> h1. Proposed Changes
> | Configuration Key | Type | Default | Description |
> |-------------------|------|---------|-------------|
> | `kubernetes.persistent-volume-claims` | Map<String, String> | (none) | PVCs
> and their mount paths in format `pvc-name:/mount/path` |
> | `kubernetes.persistent-volume-claims.read-only` | Boolean | false | Whether
> to mount PVCs as read-only |
> {code:java}
> # Mount a single PVC for checkpoint storage
> kubernetes.persistent-volume-claims: checkpoint-pvc:/opt/flink/checkpoints
> # Mount multiple PVCs
> kubernetes.persistent-volume-claims:
> checkpoint-pvc:/opt/flink/checkpoints,data-pvc:/opt/flink/data
> # Mount PVCs as read-only (for shared data)
> kubernetes.persistent-volume-claims: shared-data:/opt/flink/shared
> kubernetes.persistent-volume-claims.read-only: true {code}
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