A Kubernetes administrator can create a deployment of a kind : PodDisruptionBudget for high availability of the application, it makes sure that the minimum number is running pods are respected as mentioned by the attribute minAvailable spec file. This is useful while performing a drain where the drain will halt until the PDB is respected to ensure the High Availability(HA) of the application. The following spec file also shows minAvailable as 2 which implies the minimum number of an available pod (even after the election).
Example : YAML Config using minAvailable =>
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
name: zk-pdb
spec:
minAvailable: 2
selector:
matchLabels:
app: zookeeper
