feat(argo-rollouts): Add service monitor (#474)

Co-authored-by: Scott Cabrinha <scott@internaught.io>

charts/argo-rollouts/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 appVersion: "0.9.1"
 description: A Helm chart for Argo Rollouts
 name: argo-rollouts
-version: 0.3.7
+version: 0.3.8
 icon: https://raw.githubusercontent.com/argoproj/argo/master/argo.png
 home: https://github.com/argoproj/argo-helm
 maintainers:

charts/argo-rollouts/README.md

@@ -39,6 +39,7 @@ $ helm install --name my-release argo/argo-rollouts
 | controller.tolerations | [Tolerations for use with node taints](https://kubernetes.io/docs/concepts/configuration/taint-and-toleration/) | `[]` |
 | controller.affinity | [Assign custom affinity rules to the deployment](https://kubernetes.io/docs/concepts/configuration/assign-pod-node/) | `{}` |
 | controller.nodeSelector | [Node selector](https://kubernetes.io/docs/user-guide/node-selection/) | `{}` |
+| controller.metrics.serviceMonitor.enabled | bool | `false` |  |
 | imagePullSecrets | list | `[]` |  |
 | installCRDs | bool | `true` |  |
 | podAnnotations | object | `{}` |  |

charts/argo-rollouts/templates/argo-rollouts-service-monitor.yaml

@@ -0,0 +1,28 @@
+{{- if .Values.controller.metrics.serviceMonitor.enabled }}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ .Release.Name }}
+  labels:
+    app.kubernetes.io/component: server
+    app.kubernetes.io/name: {{ .Release.Name }}-metrics
+    app.kubernetes.io/part-of: {{ .Release.Name }}
+    {{- if .Values.controller.metrics.serviceMonitor.additionalLabels }}
+{{ toYaml .Values.controller.metrics.serviceMonitor.additionalLabels | indent 4 }}
+    {{- end }}
+  {{- if .Values.controller.metrics.serviceMonitor.additionalAnnotations }}
+  annotations:
+{{ toYaml .Values.controller.metrics.serviceMonitor.additionalAnnotations | indent 4 }}
+  {{- end }}
+spec:
+  endpoints:
+  - port: metrics
+  namespaceSelector:
+    matchNames:
+    - {{ .Release.Namespace }}
+  selector:
+    matchLabels:
+      app.kubernetes.io/component: server
+      app.kubernetes.io/name: {{ .Release.Name }}-metrics
+      app.kubernetes.io/part-of: {{ .Release.Name }}
+{{- end }}

charts/argo-rollouts/values.yaml

@@ -24,6 +24,12 @@ controller:
   #    cpu: 50m
   #    memory: 64Mi
 
+  metrics:
+    serviceMonitor:
+      enabled: false
+      additionalLabels: {}
+      additionalAnnotations: {}
+
 
 serviceAccount:
   name: argo-rollouts