Longhorn Persistent Storage on Strimzi for Kafka Cluster

[mit-novian]

Hi, team

I'm trying to use a persistent volume for a kafka cluster. The persistent volume that I use is longhorn, the status of the persistence volume claim is Bound. But the zookeeper's pod from the kafka cluster cannot attach a volume to a persistence volume claim whose the status is already Bound. Here is the yaml i use and the output of the error. Can anyone provide a solution for this?

Thanks

kafka-cluster.yaml
apiVersion: kafka.strimzi.io/v1beta2
kind: Kafka
metadata:
name: kafka-cluster
spec:
kafka:
version: 3.0.0
replicas: 1
listeners:
- name: plain
port: 9092
type: internal
tls: false
- name: tls
port: 9093
type: internal
tls: true
config:
offsets.topic.replication.factor: 1
transaction.state.log.replication.factor: 1
transaction.state.log.min.isr: 1
log.message.format.version: "3.0"
inter.broker.protocol.version: "3.0"
storage:
type: persistent-claim
size: 1Gi
class: longhorn
zookeeper:
replicas: 1
storage:
class: longhorn
type: persistent-claim
size: 1Gi
entityOperator:
topicOperator: {}
userOperator: {}

[scholzj]

Well, it says that the volume is not mounted. Strimzi doesn't mount the volumes -> that is the responsibility of Kubernetes and the Storage provider. So I think you need to look there why is it not mounted on the node. It could be some issue with the storage I guess, it could be also some scheduling issue where the disk cannot be mounted on every host etc.

As a sidenote - 1Gi of storage is very little for Kafka and might not allow you to do much.