Add pod affinity for nats helm chart

[LinPr]

What motivated this proposal?

Currenty I can't find how to set pod affinity or antiAffinity for nats , nats usually being deployed as a cluster, it's better to schedule pod to different nodes by adding affint config in pod template,

What is the proposed change?

extend the helm chart configuration

Who benefits from this change?

All of those who want to deploy nats cluster in kubernetes

What alternatives have you evaluated?

No response

[mikekuzak]

this works for me, but documentation has not enough examples just references to k8s APIs ..

podTemplate:
  topologySpreadConstraints:
    kubernetes.io/hostname:
      maxSkew: 1
      whenUnsatisfiable: DoNotSchedule
  merge:
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
              - matchExpressions:
                  - key: myorg.com/node.type
                    operator: In
                    values:
                      - "FIXED"