feat: Add pod monitor for pulling metrics

- Add network policy for allowing traffic from prometheus
- Add Pod monitor to pull metrics

charts/flaiserator/templates/deployment.yaml

@@ -12,10 +12,7 @@ spec:
   template:
     metadata:
       annotations:
-        prometheus.io/scrape: "false"
-        prometheus.io/port: "8080"
-        prometheus.io/path: "/metrics"
-        {{- with .Values.podLabels }}
+        {{- with .Values.podAnnotations }}
         {{- toYaml . | nindent 8 }}
         {{- end }}
       labels:
@@ -37,6 +34,10 @@ spec:
           imagePullPolicy: {{ .Values.image.pullPolicy }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
+          ports:
+            - name: metrics
+              containerPort: 8080
+              protocol: TCP
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}
           {{- with .Values.volumeMounts }}

charts/flaiserator/templates/networkpolicy.yaml

@@ -0,0 +1,20 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  name: {{ include "flaiserator.fullname" . }}-prometheus
+  labels:
+    {{- include "flaiserator.labels" . | nindent 4 }}
+spec:
+  podSelector:
+    matchLabels:
+      {{- include "flaiserator.selectorLabels" . | nindent 6 }}
+  ingress:
+    - from:
+        - namespaceSelector:
+            matchLabels:
+              kubernetes.io/metadata.name: {{ .Release.Namespace }}
+        - podSelector:
+            matchLabels:
+              app.kubernetes.io/name: prometheus
+  policyTypes:
+    - Ingress

charts/flaiserator/templates/podmonitor.yaml

@@ -0,0 +1,13 @@
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  labels:
+    {{- include "flaiserator.labels" . | nindent 4 }}
+  name: {{ include "flaiserator.fullname" . }}
+spec:
+  selector:
+    matchLabels:
+      {{- include "flaiserator.selectorLabels" . | nindent 6 }}
+  podMetricsEndpoints:
+    - port: metrics
+      path: /metrics