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metering-configure-persistentvolumes.adoc

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Configuring PersistentVolumes

By default, Hive requires one PersistentVolume to operate.

hive-metastore-db-data is the main PersistentVolumeClaim (PVC) required by default. This PVC is used by the Hive metastore to store metadata about tables, such as table name, columns, and location. Hive metastore is used by Presto and the Hive server to look up table metadata when processing queries. You remove this requirement by using MySQL or PostgreSQL for the Hive metastore database.

To install, Hive metastore requires that dynamic volume provisioning be enabled via a StorageClass, a persistent volume of the correct size must be manually pre-created, or that you use a pre-existing MySQL or PostgreSQL database.

Configuring the storage class for Hive metastore

To configure and specify a StorageClass for the hive-metastore-db-data PVC, specify the StorageClass in your MeteringConfig. An example StorageClass section is included in metastore-storage.yaml file below.

apiVersion: metering.openshift.io/v1
kind: MeteringConfig
metadata:
  name: "operator-metering"
spec:
  hive:
    spec:
      metastore:
        storage:
          # Default is null, which means using the default storage class if it exists.
          # If you wish to use a different storage class, specify it here
          # class: "null" (1)
          size: "5Gi"

  1. Uncomment this line and replace null with the name of the StorageClass to use. Leaving the value null will cause metering to use the default StorageClass for the cluster.

Configuring the volume sizes for the Hive Metastore

Use the metastore-storage.yaml file below as a template.

apiVersion: metering.openshift.io/v1
kind: MeteringConfig
metadata:
  name: "operator-metering"
spec:
  hive:
    spec:
      metastore:
        storage:
          # Default is null, which means using the default storage class if it exists.
          # If you wish to use a different storage class, specify it here
          # class: "null"
          size: "5Gi" (1)

  1. Replace the value for size with your desired capacity. The example file shows "5Gi".