Others

Disruptions

An Application Owner can create a PodDisruptionBudget object (PDB) for each application. A PDB limits the number of pods of a replicated application that are down simultaneously from voluntary disruptions. For example, a quorum-based application would like to ensure that the number of replicas running is never brought below the number needed for a quorum. A web front end might want to ensure that the number of replicas serving load never falls below a certain percentage of the total.

https://kubernetes.io/docs/concepts/workloads/pods/disruptions