Scrape metrics from function runtimes

[kwiatekus]

Description

Make sure metrics can be scraped from function runtimes by observability stack:

• make sure all function runtimes expose metrics which are relevant for operation of such runtime under /metrics endpoint - Expose metrics in node.js function runtime #17023
• Configure scrape-config annotations for function runtime k8s services

Reasons

Providing runtime metrics is essential for operations in the kyma runtime. Right now only python functions are exposing it (kubeless) - we miss any metrics from node.js functions. Also, the currently exposed metrics are not scraped by prometheus

Attachments
OTEL SDK for metrics
scrape-config annotations

[kyma-bot]

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[kyma-bot]

This issue or PR has been automatically marked as stale due to the lack of recent activity.
Thank you for your contributions.

This bot triages issues and PRs according to the following rules:

• After 60d of inactivity, lifecycle/stale is applied
• After 7d of inactivity since lifecycle/stale was applied, the issue is closed

You can:

• Mark this issue or PR as fresh with /remove-lifecycle stale
• Close this issue or PR with /close

If you think that I work incorrectly, kindly raise an issue with the problem.

/lifecycle stale