add health check

helm/greeter/values.yaml

@@ -88,13 +88,11 @@ resources: {}
 
 # This is to setup the liveness and readiness probes more information can be found here: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
 livenessProbe:
-  httpGet:
-    path: /
-    port: http
+  grpc:
+    port: 50051
 readinessProbe:
-  httpGet:
-    path: /
-    port: http
+  grpc:
+    port: 50051
 
 #This section is for setting up autoscaling more information can be found here: https://kubernetes.io/docs/concepts/workloads/autoscaling/
 autoscaling:

main.go

@@ -27,6 +27,8 @@ import (
 
 	"google.golang.org/grpc"
 	pb "google.golang.org/grpc/examples/helloworld/helloworld"
+	"google.golang.org/grpc/health"
+	healthgrpc "google.golang.org/grpc/health/grpc_health_v1"
 	"google.golang.org/grpc/reflection"
 )
 
@@ -51,6 +53,8 @@ func main() {
 		log.Fatalf("failed to listen: %v", err)
 	}
 	s := grpc.NewServer()
+	hc := health.NewServer()
+	healthgrpc.RegisterHealthServer(s, hc)
 	pb.RegisterGreeterServer(s, &server{})
 	reflection.Register(s)
 	if err := s.Serve(lis); err != nil {