[GitHub] [druid] himanshug edited a comment on issue #9496: druid management ui in kubernetes fails if more than one coordinator/overlord process

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himanshug edited a comment on issue #9496: druid management ui in kubernetes fails if more than one coordinator/overlord process
URL: https://github.com/apache/druid/issues/9496#issuecomment-598355639
 
 
   you can't point to service, druid(actually zookeeper client) needs to have all of zookeeper hosts individually listed like it is done in non-k8s deployments as well.
   
   if  you deployed zookeeper  using a stateful set, make sure to add  `serviceName` (as in https://github.com/druid-io/druid-operator/blob/master/examples/tiny-cluster-zk.yaml#L29  ) in the StatefulSet  is the magic attribute  that sets   `spec.subdomain` in launched pods which in turn leads to k8s cluster dns resolving fulling qualified zk pods names e.g. "tiny-cluster-zk-0.tiny-cluster-zk, tiny-cluster-zk-1.tiny-cluster-zk .. etc"
   
   https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/#pod-s-hostname-and-subdomain-fields doc describes same for pods. 
   
   Note: you might have to make your service a "headless service" but it might work with non-headless service as well so try that first, make sure "nslookup <fully qualified zk pod name>" works on all druid pods. See https://github.com/kubernetes/website/pull/16376

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