[Operational Awareness] Verify KIM configuration detect invalid / incomplete configuration-parameters

[tobiscr]

Description

The provided configuration of KIM should be validated before it get's applied. This can happen either when the configuration gets applied (e.g. in ArgoCD etc.) or by KIm itself by running sanity checks for each parameter during the bootstrapping phase.

Goals is to identify these configuration parameters which can be verified in a meaningful way (e.g. check credentials for Gardener by accessing it or run sanity checks to detect invalid resource requests etc.) to avoid that accidentally a wrong KIM configuration gets applied.

AC:

• Review parameters passed to KIM and define, for those where it's possible and meaningful, validation rules to identify invalid or wrongly set parameters
• Implement validation rules in KIM and sure they will be applied during the bootstrapping.
  • It has to be possible to turn off the parameter validation by setting an configuration parameter or env-variable
  • If an invalid parameter it detect, it has to be logged and posted on STDERR channel. The KIM process has to stop and exit.

Reasons

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