Kafka controller: cannot increase persistence volume size

[cinimins]

Name and Version

bitnami/kafka 26.4.4

What architecture are you using?

amd64

What steps will reproduce the bug?

When increasing the value controller.persistence.size and triggering an helm upgrade I get the following error:

Error: UPGRADE FAILED: cannot patch "kafka-controller" with kind StatefulSet: StatefulSet.apps "kafka-controller" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'template', 'updateStrategy', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden

This used to work before when I used brokers and zookeeper, and doesn't seem to work with controllers anymore.

Are you using any custom parameters or values?

fullnameOverride: "kafka"

controller:
  pdb:
    create: true
    maxUnavailable: 1
  replicaCount: 3
  persistence:
    size: 2Gi

sasl:
  enabledMechanisms: PLAIN,SCRAM-SHA-512
  interBrokerMechanism: SCRAM-SHA-512
  controllerMechanism: PLAIN
  client:
    users:
      - "admin"
    passwords:
      - "admin"

extraConfig: |-
  authorizer.class.name=org.apache.kafka.metadata.authorizer.StandardAuthorizer
  super.users=User:controller_user;User:admin

externalAccess:
  enabled: true

kraft:
  enabled: true

What is the expected behavior?

No response

What do you see instead?

Error: UPGRADE FAILED: cannot patch "kafka-controller" with kind StatefulSet: StatefulSet.apps "kafka-controller" is invalid: spec: Forbidden: updates to statefulset spec for fields other than 'replicas', 'template', 'updateStrategy', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden

Additional information

No response

[juan131]

Hi @cinimins

This isn't a problem with the Bitnami Kafka chart but a K8s limitation to update a statefulset's volumeClaimTemplates, see:

• https://serverfault.com/questions/955293/how-to-increase-disk-size-in-a-stateful-set