Volume claim templates
editVolume claim templates
editBy default, the operator creates a PersistentVolumeClaim
with a capacity of 1Gi for each pod in an Elasticsearch cluster to prevent data loss in case of accidental pod deletion. For production workloads, you should define your own volume claim template with the desired storage capacity and (optionally) the Kubernetes storage class to associate with the persistent volume. The name of the volume claim must always be elasticsearch-data
.
spec: nodeSets: - name: default count: 3 volumeClaimTemplates: - metadata: name: elasticsearch-data spec: accessModes: - ReadWriteOnce resources: requests: storage: 5Gi storageClassName: standard
ECK automatically deletes PersistentVolumeClaim resources if they are not required for any Elasticsearch node. The corresponding PersistentVolume may be preserved, depending on the configured storage class reclaim policy.
Depending on the Kubernetes configuration and the underlying file system, some persistent volumes cannot be resized after they are created. When you define volume claims, consider future storage requirements and make sure you have enough space to support the expected growth.
If you are not concerned about data loss, you can use an emptyDir
volume for Elasticsearch data as well:
spec: nodeSets: - name: data count: 10 podTemplate: spec: volumes: - name: elasticsearch-data emptyDir: {}
Using emptyDir
is not recommended due to the high likelihood of permanent data loss.