Chapter 44. PodDisruptionBudgetTemplate schema reference

Used in: CruiseControlTemplate, EntityOperatorTemplate, KafkaBridgeTemplate, KafkaClusterTemplate, KafkaConnectTemplate, KafkaExporterTemplate, ZookeeperClusterTemplate

Full list of PodDisruptionBudgetTemplate schema properties

A PodDisruptionBudget is an OpenShift resource that helps maintain high availability during planned maintenance or upgrades. It defines the minimum number of pods that must remain available at all times.

Streams for Apache Kafka creates one PodDisruptionBudget per component:

Each budget applies across all pods deployed for that component.

A single PodDisruptionBudget applies to all associated node pool pods managed by the Kafka resource. This is true regardless of how many StrimziPodSet resources are created for that component. Disruption limits are applied at the component level, not per node pool.

By default, only one pod can be unavailable at a time. You can modify this limit using the maxUnavailable property.

StrimziPodSet custom resources are managed by a controller that does not use maxUnavailable directly. Instead, the value is automatically converted to minAvailable, which serves the same purpose.

For example:

The above examples also applies for the EntityOperator, Cruise Control, KafkaExporter deployments.

# ...
template:
  podDisruptionBudget:
    metadata:
      labels:
        key1: label1
        key2: label2
      annotations:
        key1: label1
        key2: label2
    maxUnavailable: 1
# ...

# ...
template:
  podDisruptionBudget:
    metadata:
      labels:
        key1: label1
        key2: label2
      annotations:
        key1: label1
        key2: label2
    maxUnavailable: 1
# ...

You can then create your own PodDisruptionBudget resources. For example, apply separate budgets to specific node pools using label selectors with StrimziPodSet resources.