Documentation RFE: Advanced Topics - ComponentConfig #5104
Description
I could not find any reference to ComponentConfig in operator-sdk documentation:
https://book.kubebuilder.io/component-config-tutorial/tutorial.html
This is an important aspect for controlling any advance functionality of the controller:
- cleansing policies
- sync period
- logging level
- feature gates
IMHO this should be part of best practices for development of any advanced operator.
The current alternative of relying on feature flags has several limitations, for instance:
- any configuration change requires the controller deployment to be changed and the controller to be restarted
- this does not support any data structure / validation and little self documentation
- this is not gitOps friendly: the deployment is created at installation time and needs to be patched afterwards, whereas a configuration resource can just be applied onto the default one.
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