[kube-prometheus-stack] Add matchLabel to prevent duplicate kubelet targets (#860)

* [kube-prometheus-stack] Add matchLabel to prevent duplicate kubelet targets

Fixes #614

Signed-off-by: [CODE] Sven Schliesing <s.schliesing@tagesschau.de>

* [kube-prometheus-stack] Bump version

Signed-off-by: [CODE] Sven Schliesing <s.schliesing@tagesschau.de>

Co-authored-by: André Bauer <monotek@users.noreply.github.com>

charts/kube-prometheus-stack/Chart.yaml

@@ -18,7 +18,7 @@ name: kube-prometheus-stack
 sources:
   - https://github.com/prometheus-community/helm-charts
   - https://github.com/prometheus-operator/kube-prometheus
-version: 15.2.0
+version: 15.2.1
 appVersion: 0.47.0
 kubeVersion: ">=1.16.0-0"
 home: https://github.com/prometheus-operator/kube-prometheus

charts/kube-prometheus-stack/templates/exporters/kubelet/servicemonitor.yaml

@@ -150,5 +150,6 @@ spec:
     - {{ .Values.kubelet.namespace }}
   selector:
     matchLabels:
+      app.kubernetes.io/managed-by:  prometheus-operator
       k8s-app: kubelet
 {{- end}}