Changing serviceType in kubernetes using helm upgrade

Question

We have a service already deployed as a headless service i.e clusterIp : None in production. Now we need to change this to a non headless service i.e type should be ClusterIp and clusterIp should be set to some value other than None. I modified the charts and tried to deploy using helm upgrade command. But its not allowed and helm is complaining that service type is an immutable field.

kubectl edit svc also was not able to helpful. kubectl patch also dint work. Any workarounds for this problem other than deleting helm chart and redeploying it again?

Did you try to delete the service before running upgrade? Helm should identify the service as a missing resource, and recreate it with the new type. — Eduardo Baitello
What was the output of kubectl edit svc and kubectl patch ? — Nick
@EduardoBaitello Deleting a service in production during would cause a downtime right? — Sumit Nekar
@Nick kubectl edit svc => can not modify immutable field. kubectl patch => service was not patched. — Sumit Nekar

Nick Nick · Accepted Answer · 2020-02-03T15:26:33

If we are speaking about Services, then ClusterIP is usually assigned by the master and is the IP address of the service.

If specified, it will be allocated to the service if it is unused or else creation of the service will fail.

Valid values are None, empty string (""), or a valid IP address. None can be specified for a headless service when proxying is not required.

Cannot be updated.

You can find Kubernetes Top Level API Objects Documentation helpful.

Hope that sheds the light on the root cause of the issue you are facing (changing service type).

Changing serviceType in kubernetes using helm upgrade

1 Answers