prometheus-exporter: Fix antiaffinity rule for Mikrotik exporter

prometheus-operator/mikrotik-exporter.yml

@@ -87,7 +87,13 @@ spec:
       affinity:
         podAntiAffinity:
           requiredDuringSchedulingIgnoredDuringExecution:
-          - topologyKey: "kubernetes.io/hostname"
+          - labelSelector:
+              matchExpressions:
+              - key: app
+                operator: In
+                values:
+                - mikrotik-exporter
+            topologyKey: "kubernetes.io/hostname"
 ---
 kind: Service
 apiVersion: v1