Merge pull request #8 from grzegorzgniadek/prom-metrics

Prom metrics

VERSION

@@ -1 +1 @@
-0.5.0
+0.6.0-rc

charts/interpolator/Chart.yaml

@@ -13,10 +13,9 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.5.0
+version: 0.6.0-rc
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # It is recommended to use it with quotes.
-appVersion: "0.5.0"
-
+appVersion: "0.6.0-rc"

charts/interpolator/README.md

@@ -2,7 +2,7 @@
 
 
 
-![Version: 0.5.0](https://img.shields.io/badge/Version-0.5.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.5.0](https://img.shields.io/badge/AppVersion-0.5.0-informational?style=flat-square) 
+![Version: 0.6.0-rc](https://img.shields.io/badge/Version-0.6.0--rc-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.6.0-rc](https://img.shields.io/badge/AppVersion-0.6.0--rc-informational?style=flat-square) 
 
 Interpolator Helm Chart
 
@@ -23,12 +23,20 @@ Interpolator Helm Chart
 | controllerManager.manager.containerSecurityContext.allowPrivilegeEscalation | bool | `false` |  |
 | controllerManager.manager.containerSecurityContext.capabilities.drop[0] | string | `"ALL"` |  |
 | controllerManager.manager.image.repository | string | `"ghcr.io/grzegorzgniadek/interpolator-operator"` |  |
-| controllerManager.manager.image.tag | string | `"0.5.0"` |  |
+| controllerManager.manager.image.tag | string | `"0.6.0-rc"` |  |
 | controllerManager.manager.imagePullPolicy | string | `"Always"` |  |
 | controllerManager.manager.resources.limits.cpu | string | `"200m"` |  |
 | controllerManager.manager.resources.limits.memory | string | `"128Mi"` |  |
 | controllerManager.manager.resources.requests.cpu | string | `"10m"` |  |
 | controllerManager.manager.resources.requests.memory | string | `"64Mi"` |  |
 | controllerManager.replicas | int | `1` |  |
 | controllerManager.serviceAccount.annotations | object | `{}` |  |
-| kubernetesClusterDomain | string | `"cluster.local"` |  |
+| kubernetesClusterDomain | string | `"cluster.local"` |  |
+| metricsService.enabled | bool | `true` |  |
+| metricsService.ports[0].name | string | `"http"` |  |
+| metricsService.ports[0].port | int | `8080` |  |
+| metricsService.ports[0].protocol | string | `"TCP"` |  |
+| metricsService.ports[0].targetPort | int | `8080` |  |
+| metricsService.type | string | `"ClusterIP"` |  |
+| prometheusMonitor.enabled | bool | `false` |  |
+| prometheusMonitor.path | string | `"/metrics"` |  |

charts/interpolator/templates/metrics-monitor.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.prometheusMonitor.enabled -}}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ include "interpolator.fullname" . }}-metrics-monitor
+  labels:
+    control-plane: controller-manager
+  {{- include "interpolator.labels" . | nindent 4 }}
+spec:
+  endpoints:
+  - path: {{ .Values.prometheusMonitor.path }}
+    port: http
+    scheme: http
+  selector:
+    matchLabels:
+      control-plane: controller-manager
+{{- end -}}

charts/interpolator/templates/metrics-service.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.metricsService.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "interpolator.fullname" . }}-metrics-service
+  labels:
+    control-plane: controller-manager
+  {{- include "interpolator.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.metricsService.type }}
+  selector:
+    control-plane: controller-manager
+  {{- include "interpolator.selectorLabels" . | nindent 4 }}
+  ports:
+	{{- .Values.metricsService.ports | toYaml | nindent 2 }}
+{{- end -}}

charts/interpolator/values.yaml

@@ -10,7 +10,7 @@ controllerManager:
         - ALL
     image:
       repository: ghcr.io/grzegorzgniadek/interpolator-operator
-      tag: 0.5.0
+      tag: 0.6.0-rc
     imagePullPolicy: Always
     resources:
       limits:
@@ -23,3 +23,14 @@ controllerManager:
   serviceAccount:
     annotations: {}
 kubernetesClusterDomain: cluster.local
+metricsService:
+  enabled: true
+  ports:
+  - name: http
+    port: 8080
+    protocol: TCP
+    targetPort: 8080
+  type: ClusterIP
+prometheusMonitor:
+  enabled: false
+  path: /metrics

config/default/kustomization.yaml

@@ -22,9 +22,7 @@ resources:
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER'. 'WEBHOOK' components are required.
 #- ../certmanager
 # [PROMETHEUS] To enable prometheus monitor, uncomment all sections with 'PROMETHEUS'.
-#- ../prometheus
-# [METRICS] To enable the controller manager metrics service, uncomment the following line.
-#- metrics_service.yaml
+- ../prometheus
 
 # Uncomment the patches line if you enable Metrics, and/or are using webhooks and cert-manager
 #patches:
@@ -33,7 +31,7 @@ resources:
 # If you want to expose the metric endpoint of your controller-manager uncomment the following line.
 #- path: manager_metrics_patch.yaml
 #  target:
-#    kind: Deployment
+#   kind: Deployment
 
 # [WEBHOOK] To enable webhook, uncomment all the sections with [WEBHOOK] prefix including the one in
 # crd/kustomization.yaml
@@ -46,7 +44,6 @@ resources:
 
 # [CERTMANAGER] To enable cert-manager, uncomment all sections with 'CERTMANAGER' prefix.
 # Uncomment the following replacements to add the cert-manager CA injection annotations
-#replacements:
 #  - source: # Add cert-manager annotation to ValidatingWebhookConfiguration, MutatingWebhookConfiguration and CRDs
 #      kind: Certificate
 #      group: cert-manager.io
@@ -143,3 +140,19 @@ resources:
 #          delimiter: '.'
 #          index: 1
 #          create: true
+replacements:
+ - source: 
+     kind: Deployment
+     name: controller-manager 
+     fieldPath: .metadata.namespace 
+   targets:
+     - select:
+         kind: ClusterRoleBinding
+         name: manager-rolebinding
+       fieldPaths:
+         - .subjects.0.namespace
+     - select:
+         kind: RoleBinding
+         name: leader-election-rolebinding
+       fieldPaths:
+         - .subjects.0.namespace

config/manager/kustomization.yaml

@@ -1,8 +1,10 @@
 resources:
   - manager.yaml
+  # [METRICS] To enable the controller manager metrics service, uncomment the following line.
+  - metrics_service.yaml
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 images:
   - name: controller
     newName: ghcr.io/grzegorzgniadek/interpolator-operator
-    newTag: "0.5.0"
+    newTag: "0.6.0-rc"

config/manager/manager.yaml

@@ -5,7 +5,7 @@ metadata:
     control-plane: controller-manager
     app.kubernetes.io/name: interpolator-operator
     app.kubernetes.io/managed-by: kustomize
-  name: interpolator-operator-system
+  name: system
 ---
 apiVersion: apps/v1
 kind: Deployment

config/rbac/kustomization.yaml

@@ -14,6 +14,5 @@ resources:
 # default, aiding admins in cluster management. Those roles are
 # not used by the Project itself. You can comment the following lines
 # if you do not want those helpers be installed with your Project.
-- interpolator_editor_role.yaml
-- interpolator_viewer_role.yaml
-
+- editor_role.yaml
+- viewer_role.yaml

internal/controller/interpolator_controller.go

@@ -74,6 +74,16 @@ func (r *InterpolatorReconciler) Reconcile(ctx context.Context, req ctrl.Request
 
 	// Fetch the Interpolator instance
 	interpolator := &interpolatorv1.Interpolator{}
+	interpolatorList := &interpolatorv1.InterpolatorList{}
+
+	if err := r.List(ctx, interpolatorList); err != nil {
+		log.Error(err, "failed to list custom resources")
+
+		return ctrl.Result{}, nil
+	}
+	count := len(interpolatorList.Items)
+	interCount.Set(float64(count))
+
 	err := r.Get(ctx, req.NamespacedName, interpolator)
 	if err != nil {
 		if apierrors.IsNotFound(err) {

internal/controller/metrics.go

@@ -0,0 +1,20 @@
+package controller
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"sigs.k8s.io/controller-runtime/pkg/metrics"
+)
+
+var (
+	interCount = prometheus.NewGauge(
+		prometheus.GaugeOpts{
+			Name: "inter_count",
+			Help: "Count of inter resources",
+		},
+	)
+)
+
+func init() {
+	// Register custom metrics with the global prometheus registry
+	metrics.Registry.MustRegister(interCount)
+}