feat: add metrics for argo-cd/dex (#452)

charts/argo-cd/templates/dex/deployment.yaml

@@ -80,6 +80,11 @@ spec:
         - name: grpc
           containerPort: {{ .Values.dex.containerPortGrpc }}
           protocol: TCP
+        {{- if .Values.dex.metrics.enabled }}
+        - name: metrics
+          containerPort: {{ .Values.dex.containerPortMetrics }}
+          protocol: TCP
+        {{- end }}
 {{- if .Values.dex.volumeMounts }}
         volumeMounts:
 {{- toYaml .Values.dex.volumeMounts | nindent 10 }}

charts/argo-cd/templates/dex/service.yaml

@@ -20,6 +20,12 @@ spec:
     protocol: TCP
     port: {{ .Values.dex.servicePortGrpc }}
     targetPort: grpc
+{{- if .Values.dex.metrics.enabled }}
+  - name: metrics
+    protocol: TCP
+    port: {{ .Values.dex.servicePortMetrics }}
+    targetPort: metrics
+{{- end }}
   selector:
     app.kubernetes.io/name: {{ include "argo-cd.name" . }}-{{ .Values.dex.name }}
     app.kubernetes.io/instance: {{ .Release.Name }}

charts/argo-cd/templates/dex/servicemonitor.yaml

@@ -0,0 +1,35 @@
+{{- if and .Values.dex.metrics.enabled .Values.dex.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "argo-cd.dex.fullname" . }}
+  {{- if .Values.dex.metrics.serviceMonitor.namespace }}
+  namespace: {{ .Values.dex.metrics.serviceMonitor.namespace }}
+  {{- end }}
+  labels:
+    app.kubernetes.io/name: {{ include "argo-cd.name" . }}-{{ .Values.dex.name }}
+    helm.sh/chart: {{ include "argo-cd.chart" . }}
+    app.kubernetes.io/instance: {{ .Release.Name }}
+    app.kubernetes.io/managed-by: {{ .Release.Service }}
+    app.kubernetes.io/part-of: argocd
+    app.kubernetes.io/component: {{ .Values.dex.name }}
+    {{- if .Values.dex.metrics.serviceMonitor.selector }}
+{{- toYaml .Values.dex.metrics.serviceMonitor.selector | nindent 4 }}
+    {{- end }}
+    {{- if .Values.dex.metrics.serviceMonitor.additionalLabels }}
+{{- toYaml .Values.dex.metrics.serviceMonitor.additionalLabels | nindent 4 }}
+    {{- end }}
+spec:
+  endpoints:
+    - port: metrics
+      interval: 30s
+      path: /metrics
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/instance: {{ .Release.Name }}
+      app.kubernetes.io/name: {{ include "argo-cd.name" . }}-{{ .Values.dex.name }}
+      app.kubernetes.io/component: {{ .Values.dex.name }}
+{{- end }}