gyfora opened a new pull request, #311:
URL: https://github.com/apache/flink-kubernetes-operator/pull/311
## What is the purpose of the change
Introduce histogram metrics for tracking how long resource lifecycle state
transitions take between the following states:
- CREATED
- SUSPENDED
- UPGRADING
- DEPLOYED
- STABLE
- ROLLING_BACK
- ROLLED_BACK
- FAILED
New metrics:
```
FlinkDeployment.Lifecycle.Transition.ResumeTimeSeconds: count=0, min=0,
max=0, mean=NaN, ...
FlinkDeployment.Lifecycle.Transition.SuspendTimeSeconds: count=1, min=2,
max=2, mean=2.0, ...
FlinkDeployment.Lifecycle.Transition.UpgradeTimeSeconds: count=1, min=33,
max=33, mean=33.0, ...
FlinkDeployment.Lifecycle.Transition.StabilizationTimeSeconds: count=1,
min=29, max=29, mean=29.0, ...
FlinkDeployment.Lifecycle.Transition.RollbackTimeSeconds: count=0, min=0,
max=0, mean=NaN, ...
FlinkDeployment.Lifecycle.Transition.SubmissionTimeSeconds: count=1, min=1,
max=1, mean=1.0, ...
FlinkDeployment.Lifecycle.State.STATE_NAME.Count: 0
```
## Brief change log
- Introduce ResourceLifecycleState derived from the resource status
- Add mechanism to track ResourceLifecycleState transitions
- Create histogram metrics for select transitions
- Add count metrics for each state
- Add tests
## Verifying this change
New unit tests + manually verified on minikube
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): no
- The public API, i.e., is any changes to the `CustomResourceDescriptors`:
no
- Core observer or reconciler logic that is regularly executed: no
## Documentation
- Does this pull request introduce a new feature? yes
- If yes, how is the feature documented? **[TODO]**
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