Create additional metric providers

[StackScribe]

Goal

The Keptn Metrics Operator is currently supporting Prometheus and Dynatrace as Metrics Providers. To allow a broader range of observability providers, additional integrations should be provided.

Technical Details

• Additional Metrics providers for KeptnMetrics should be provided (example: https://github.com/keptn/lifecycle-toolkit/tree/main/operator/controllers/common/providers)
• This might be: Prometheus Exporters, Sentry, Datadog, Nagios, Icinga, Zabbix, ...

DoD

• Documentation is updated under https://github.com/keptn/lifecycle-toolkit/blob/main/metrics-operator/README.md#contributing that describes how to implement the interface and what each parameter is useful for

[heckelmann]

I would suggest having a generic API provider as well like keda does (https://keda.sh/docs/2.9/scalers/metrics-api/).

[octonawish-akcodes]

I am interested in this how can I get started any resources and slack link?

[ShivangShandilya]

Regards @thschue @RealAnna. I'm pretty intrigued with this project, any pointers on how can I start with this??

[ronitblenz]

I am interested to start a proposal in this project. It would be convenient if I knew the process of application/writing proposal. Slack/Discord channel for communication is also appreciated !

[thisthat]

Hey all! I agree with @heckelmann: a generic API provider should be implemented. This way, based on an URL and API token (optional) we could get multiple providers out-of-the-box.

For resource on how to implement this, please have a look at #554 and its related PR

[github-actions]

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