pkg/sdk: Add /debug and /metrics http endpoints

pkg/generator/deploy_tmpl.go

@@ -54,6 +54,9 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: metadata.namespace
+          ports:
+            - containerPort: 8080
+              name: metrics
 `
 
 const rbacYamlTmpl = `kind: Role

pkg/generator/gen_deploy_test.go

@@ -45,6 +45,9 @@ spec:
               valueFrom:
                 fieldRef:
                   fieldPath: metadata.namespace
+          ports:
+            - containerPort: 8080
+              name: metrics
 `
 
 const rbacYamlExp = `kind: Role

pkg/generator/generator_test.go

@@ -41,6 +41,7 @@ func printVersion() {
 
 func main() {
 	printVersion()
+	sdk.RegisterMetrics()
 
 	resource := "app.example.com/v1alpha1"
 	kind := "AppService"

pkg/generator/main_tmpl.go

@@ -37,6 +37,7 @@ func printVersion() {
 
 func main() {
 	printVersion()
+	sdk.RegisterMetrics()
 
 	resource := "{{.APIVersion}}"
 	kind := "{{.Kind}}"

pkg/sdk/api.go

@@ -16,10 +16,13 @@ package sdk
 
 import (
 	"context"
+	"net/http"
 
 	"github.com/operator-framework/operator-sdk/pkg/k8sclient"
 	sdkHandler "github.com/operator-framework/operator-sdk/pkg/sdk/handler"
 	sdkInformer "github.com/operator-framework/operator-sdk/pkg/sdk/informer"
+	sdkMetrics "github.com/operator-framework/operator-sdk/pkg/sdk/metrics"
+	_ "github.com/operator-framework/operator-sdk/pkg/sdk/pprof"
 
 	"github.com/sirupsen/logrus"
 )
@@ -64,3 +67,16 @@ func Run(ctx context.Context) {
 	}
 	<-ctx.Done()
 }
+
+func RegisterMetrics() {
+	addr := ":8080"
+	if err := sdkMetrics.Register(); err != nil {
+		logrus.Errorf("failed to register metrics: %v", err)
+		panic(err)
+	}
+	// pprof was registered to http.DefaultServeMutex just by importing the package
+	go func() {
+		logrus.Println(http.ListenAndServe(addr, nil))
+	}()
+	logrus.Infof("Metrics and pprof registered on: %s", addr)
+}

pkg/sdk/metrics/metrics.go

@@ -0,0 +1,12 @@
+package metrics
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+func Register() error {
+	http.Handle("/metrics", promhttp.Handler())
+	return nil
+}

pkg/sdk/pprof/pprof.go

@@ -0,0 +1,5 @@
+package pprof
+
+import (
+	_ "net/http/pprof"
+)