[FEATURE] K8S Use a ConfigMap for global config

[schmittse]

What's needed and why?

Right now we have to set env variables on each deploy/daemonSet, a better approch would be to define a configMap and load the Env from this ConfigMap.

Implementations ideas (optional)

From official documentation you can load env from a ConfigMap :

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
    - name: test-container
      image: registry.k8s.io/busybox
      command: [ "/bin/sh", "-c", "env" ]
      envFrom:
      - configMapRef:
          name: special-config
  restartPolicy: Never

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