feat(argocd-applicationset): Add resources metrics-service and servicemonitor. (#1041)

* [argocd-applicationset]: Add metrics-service and servicemonitor to applicationset.

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* [argocd-applicationset]: Add ci values for servicemonitor.

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* format indent

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* update helm docs

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* update ci values

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* update ci values

Signed-off-by: fuyuan.chu <fuyuan.chu@airwallex.com>

* chore: Use consistent indents and file ending

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

* Also disable mounts of ArgoCD during metrics test

Signed-off-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

Co-authored-by: Marco Kilchhofer <mkilchhofer@users.noreply.github.com>

charts/argocd-applicationset/values.yaml

@@ -31,6 +31,35 @@ args:
   # -- Enable dry run mode
   dryRun: false
 
+  ## Metrics service configuration
+metrics:
+  # -- Deploy metrics service
+  enabled: false
+  service:
+    # -- Metrics service annotations
+    annotations: {}
+    # -- Metrics service labels
+    labels: {}
+    # -- Metrics service port
+    servicePort: 8085
+  serviceMonitor:
+    # -- Enable a prometheus ServiceMonitor
+    enabled: false
+    # -- Prometheus ServiceMonitor interval
+    interval: 30s
+    # -- Prometheus [RelabelConfigs] to apply to samples before scraping
+    relabelings: []
+    # -- Prometheus [MetricRelabelConfigs] to apply to samples before ingestion
+    metricRelabelings: []
+    # -- Prometheus ServiceMonitor selector
+    selector: {}
+      # prometheus: kube-prometheus
+
+    # -- Prometheus ServiceMonitor namespace
+    namespace: "" # monitoring
+    # -- Prometheus ServiceMonitor labels
+    additionalLabels: {}
+
 # -- If defined, uses a Secret to pull an image from a private Docker registry or repository.
 imagePullSecrets: []
 # -- Provide a name in place of `argocd-applicationset`