[tempo] bug: Service name is different from the Service name specified in StatefulSets

[Ryo Tozawa]

Problem Detail:

• StatefulSets resource defines serviceName as ${SERVICE_NAME}-headless
• However service name is defined in ${SERVICE_NAME}.
• So, name resolution with FQDN in Headless Service is not possible.

Resolution:

• Assign a headless suffix to the Service resource name
• or
• Remove Headless prefix from Service Name in StatefulSet

Reference:

• StatefulSet (spec.serviceName)
  • https://github.com/grafana/helm-charts/blob/main/charts/tempo/templates/statefulset.yaml#L20
• Service (metadata.name)
  • https://github.com/grafana/helm-charts/blob/main/charts/tempo/templates/service.yaml#L4

[Daniel Strobusch]

I think there might be more to this:

https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/:

StatefulSets currently require a Headless Service to be responsible for the network identity of the Pods. You are responsible for creating this Service.

The helm chart is currently not defining a headless service.