Add support to Prometheus by Operator

Author: camilamacedo86

pkg/scaffold/project.go

@@ -34,6 +34,7 @@ import (
 	"sigs.k8s.io/kubebuilder/pkg/scaffold/v2/certmanager"
 	managerv2 "sigs.k8s.io/kubebuilder/pkg/scaffold/v2/manager"
 	metricsauthv2 "sigs.k8s.io/kubebuilder/pkg/scaffold/v2/metricsauth"
+	"sigs.k8s.io/kubebuilder/pkg/scaffold/v2/prometheus"
 	"sigs.k8s.io/kubebuilder/pkg/scaffold/v2/webhook"
 )
 
@@ -216,7 +217,6 @@ func (p *V2Project) Scaffold() error {
 		p.buildUniverse(),
 		input.Options{ProjectPath: projectInput.Path, BoilerplatePath: bpInput.Path},
 		&project.GitIgnore{},
-		&metricsauthv2.KustomizePrometheusMetricsPatch{},
 		&metricsauthv2.KustomizeAuthProxyPatch{},
 		&scaffoldv2.AuthProxyService{},
 		&project.AuthProxyRole{},
@@ -237,6 +237,8 @@ func (p *V2Project) Scaffold() error {
 		&webhook.KustomizeConfigWebhook{},
 		&webhook.Service{},
 		&webhook.InjectCAPatch{},
+		&prometheus.Kustomization{},
+		&prometheus.PrometheusServiceMonitor{},
 		&certmanager.CertManager{},
 		&certmanager.Kustomization{},
 		&certmanager.KustomizeConfig{})

pkg/scaffold/v2/authproxyservice.go

@@ -41,10 +41,6 @@ func (r *AuthProxyService) GetInput() (input.Input, error) {
 var AuthProxyServiceTemplate = `apiVersion: v1
 kind: Service
 metadata:
-  annotations:
-    prometheus.io/port: "8443"
-    prometheus.io/scheme: https
-    prometheus.io/scrape: "true"
   labels:
     control-plane: controller-manager
   name: controller-manager-metrics-service

pkg/scaffold/v2/kustomize.go

@@ -73,6 +73,8 @@ bases:
 #- ../webhook
 # [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
 
 patchesStrategicMerge:
   # Protect the /metrics endpoint by putting it behind auth.

pkg/scaffold/v2/metricsauth/kustomize_metrics_patch.go

@@ -0,0 +1,41 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package prometheus
+
+import (
+	"path/filepath"
+	"sigs.k8s.io/kubebuilder/pkg/scaffold/input"
+)
+
+// Kustomization scaffolds the kustomizaiton in the prometheus folder
+type Kustomization struct {
+	input.Input
+}
+
+// GetInput implements input.File
+func (p *Kustomization) GetInput() (input.Input, error) {
+	if p.Path == "" {
+		p.Path = filepath.Join("config", "prometheus", "kustomization.yaml")
+	}
+	p.TemplateBody = kustomizationTemplate
+	return p.Input, nil
+}
+
+var kustomizationTemplate = `resources:
+- monitor.yaml
+`
+

pkg/scaffold/v2/prometheus/kustomize.go

@@ -0,0 +1,37 @@
+package prometheus
+
+import (
+	"path/filepath"
+	"sigs.k8s.io/kubebuilder/pkg/scaffold/input"
+)
+
+// PrometheusMetricsService scaffolds an issuer CR and a certificate CR
+type PrometheusServiceMonitor struct {
+	input.Input
+}
+
+// GetInput implements input.File
+func (p *PrometheusServiceMonitor) GetInput() (input.Input, error) {
+	if p.Path == "" {
+		p.Path = filepath.Join("config", "prometheus", "monitor.yaml")
+	}
+	p.TemplateBody = monitorTemplate
+	return p.Input, nil
+}
+
+var monitorTemplate = `
+# Prometheus Monitor Service (Metrics)
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  labels:
+    control-plane: controller-manager
+  name: controller-manager-metrics-monitor
+  namespace: system
+spec:
+  endpoints:
+    - path: /metrics
+      port: https
+  selector:
+    control-plane: controller-manager
+`