Reloader

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Is your feature request related to a problem? Please describe. I would like to restart all my pod that have an istio sidecar when the istio tag version change.

Describe the solution you'd like I propose to allow that the namespace is mentioned in the reloader anotation like this :

apiVersion: apps/v1
kind: Deployment
metadata:
  name: test
  namespace: test
  annotations:
    configmap.reloader.stakater.com/reload: istio-system/stable-tag
...

In order for this deployment to be rolled out when my configmap in istio namespace change :

apiVersion: v1
kind: ConfigMap
metadata:
  name: stable-tag
  namespace: istio-system
data:
  version: 1-16-7

Describe alternatives you've considered If it is not possible I will try to use Kyverno to do that but it is more complex to setup (https://kyverno.io/policies/other/res/restart-deployment-on-secret-change/restart-deployment-on-secret-change/).

@ZeBidule we welcome Pull Requests, feel free to create one. This seems like a valid enhancement/usecase.