feat(metrics): Calico service and monitor added

!1

docs/projects/kubernetes_monitoring/index.md

@@ -37,6 +37,12 @@ This helm chart started off with components from multiple open-source projects.
 
 - Grafana as the visualization frontend
 
+- Service monitors
+
+    - Calico, _if Selected_
+
+        > enable calico metrics with `kubectl patch felixconfiguration default --type merge --patch '{"spec":{"prometheusMetricsEnabled": true}}'`
+
 
 ## Installation
 

templates/Service-CalicoMetrics.yaml

@@ -0,0 +1,20 @@
+---
+{{- if eq .Values.nfc_monitoring.kubernetes.networking "calico" -}}
+
+apiVersion: v1
+kind: Service
+metadata:
+  name: calico-metrics
+  namespace: kube-system
+  labels:
+    k8s-app: calico-node
+spec:
+  clusterIP: None
+  selector:
+    k8s-app: calico-node
+  ports:
+  - port: 9091
+    name: metrics
+    targetPort: 9091
+
+{{- end -}}

templates/ServiceMonitor-Calico.yaml

@@ -0,0 +1,36 @@
+---
+{{- if eq .Values.nfc_monitoring.kubernetes.networking "calico" -}}
+
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    app.kubernetes.io/name: calico
+    app.kubernetes.io/component: networking
+    app.kubernetes.io/part-of: {{ $.Chart.Name }}
+    app.kubernetes.io/version: {{ $.Chart.Version }}
+    app.kubernetes.io/managed-by: {{ $.Release.Service }}
+    k8s-app: calico-node
+  name: calico
+  namespace: kube-system
+spec:
+  endpoints:
+  - bearerTokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
+    interval: 15s
+    port: metrics
+    relabelings:
+    - action: replace
+      regex: (.*)
+      replacement: $1
+      sourceLabels:
+      - __meta_kubernetes_pod_node_name
+      targetLabel: instance
+    scheme: http
+    # tlsConfig:
+    #   insecureSkipVerify: true
+  jobLabel: app.kubernetes.io/name
+  selector:
+    matchLabels:
+      k8s-app: calico-node
+
+{{- end -}}