How to Implement Nodeselector for Kafka and Zookeeper

[jeffreywstevens]

This works in my environment to keep pods from being deployed to Windows nodes.
' nodeSelector:
kubernetes.io/os: linux'

How do I implement this for the kafka cluster yaml file for both kafka and zookeeper. When I tried affinity, it gives and errors, so I am doing something wrong, or I have outdated google hits.

I tried permutations of this but get validation errors.
template: pod: affinity: nodeAffinity: requiredDuringSchedulingIgnoredDuringExecution: nodeSelectorTerms: - matchExpressions: - key: kubernetes.io/os operator: In values: - linux
[ValidationError(Kafka.spec.kafka): unknown field "affinity" in io.strimzi.kafka.v1beta2.Kafka.spec.kafka,

I know more RTFM but does someone have a working example like this to help me out?

[jeffreywstevens]

I fixed it.

[scholzj]

Great. Maybe if you say how you fixed it, it could help others ;-)

[jeffreywstevens]

I did have one embarrassing typo. Below is what worked. This also has to be applied to zookeeper and the operators in the Kafka object.

kafka:
template:
pod:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux

[fayazahamedj]

Hello Everyone & @jeffreywstevens I tried to implement NodeSelector for both Kafka & zookeeper as suggested above by Jeffrey, but it's not taking effect. Could you take a look?

apiVersion: kafka.strimzi.io/v1beta2
kind: Kafka
metadata:
 name: my-cluster
 namespace: streaming-telemetry
spec:
  zookeeper:
     replicas: 3
     storage:
       size: 2Gi
       type: persistent-claim
     template:
        pod:
           affinity:
              nodeAffinity:
                 requiredDuringSchedulingIgnoredDuringExecution:
                    nodeSelectorTerms:
                       - matchExpressions:
                              - key: nodetype
                                 operator: In
                                 values:
                                 - kafka