localhost:2222/metrics prepopulate with some keptn_ metrics

[agardnerIT]

During initial installation, users can port forward to localhost:2222/metrics and see the Prometheus metrics page.

However, this page only shows the "default" go_ metrics (before a KeptnApp deployment has occurred.

This causes user confusion: Am I looking at the correct thing? Is Keptn working properly?

My suggestion would be to add a new metric with the prefix keptn_ which signals that KLT is indeed installed correctly and waiting.

Docs can always make this clear that new and additional metrics will flow in after the first deployment.

TLDR: Add a new keptn_active=1 (or equivalent) metric which appears OOTB before any application deployments.

DoD

• have a new metric called keptn_lifecycle_active in the lifecycle-operator that is set to 1 as soon as the operator starts
• have a new metric called keptn_metric_active in the metrics-operator that is set to 1 as soon as the operator starts
• make a kuttl test with a job that checks the localhost:2222/metrics endpoint has the new metrics, you can take an example from this test

AC

• integration tests are green
• the example exercise shows the metrics on localhost:2222/metrics

[geoffrey1330]

Hi @agardnerIT @RealAnna
could you please assign this issue to me.

[RealAnna]

thanks @geoffrey1330 I will assign you !

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This issue will be unassigned in 1 week if no further activity is seen.
If you are active please provide an update on the status of the issue and if you would like to continue
working on it.