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Pod disruption budget
editPod disruption budget
editA Pod Disruption Budget allows limiting disruptions on an existing set of Pods while the Kubernetes cluster administrator manages cluster nodes. Elasticsearch makes sure some indices don’t become unavailable.
A default PDB is enforced by default: it allows one Elasticsearch Pod to be taken down as long as the cluster has a green health.
This default can be tweaked in the Elasticsearch specification:
apiVersion: elasticsearch.k8s.elastic.co/{eck_crd_version}
kind: Elasticsearch
metadata:
name: quickstart
spec:
version: 8.17.0
nodeSets:
- name: default
count: 3
podDisruptionBudget:
spec:
minAvailable: 2
selector:
matchLabels:
elasticsearch.k8s.elastic.co/cluster-name: quickstart
Note that maxUnavailable cannot be used with an arbitrary label selector, hence the usage of minAvailable in this example.
The default PDB can also be explicitly disabled:
apiVersion: elasticsearch.k8s.elastic.co/v1alpha1
kind: Elasticsearch
metadata:
name: quickstart
spec:
version: 7.2.0
nodes:
- nodeCount: 3
podDisruptionBudget: {}