That's the main suspicion with this cluster, however there is no Grafana image deployed in metrics-staging, the only one deployment currently is an old version from gcr.io/apache-beam-testing/metrics, which is also present in the 'metrics' cluster, because of that we could only find the DNS and External IP for 'metrics', the service is not present in 'metrics-staging'.
The second possible scenario is that this cluster is more like a testing cluster for metrics and not actually a staging version as it is not actively used. Probably new versions and changes to the Grafana image are tested against 'metrics-staging' and all the resources are removed once the process is finished, this will explain the lack of deployments, in both cases more information is required to justify the prevalence of the cluster, a better option would be to recreate the test cluster each time its used to avoid long idle periods. Regards. -- *This email and its contents (including any attachments) are being sent to you on the condition of confidentiality and may be protected by legal privilege. Access to this email by anyone other than the intended recipient is unauthorized. If you are not the intended recipient, please immediately notify the sender by replying to this message and delete the material immediately from your system. Any further use, dissemination, distribution or reproduction of this email is strictly prohibited. Further, no representation is made with respect to any content contained in this email.*
