Multiple namespaces passed to WATCH_NAMESPACE

[jkremser]

Proposal

the current implementation gives a false impression that multiple namespaces are supported (method called GetWatchNamespaces + plular used here). However, it's not the case. No matter what's in the WATCH_NAMESPACE env var, it just passes its content to the cache options when calling NewManager in operator's main.go.

Use-Case

more fine control over where Keda is looking for CRs. Now it's either 1 ns or all. Otherwise one has to install multiple KEDA w/ different namespaces in WATCH_NAMESPACE which leads to wasting of resources and configuration complexity (because some things are global, like the admission webhook)

Is this a feature you are interested in implementing yourself?

Yes

Anything else?

No response