k8s: start using grpc health check for cartservice (#63)

kubernetes-manifests/cartservice.yaml

@@ -45,12 +45,12 @@ spec:
         readinessProbe:
           initialDelaySeconds: 15
           exec:
-            command: ["/cartservice_probe"]
+            command: ["/bin/grpc_health_probe", "-addr=:7070"]
         livenessProbe:
           initialDelaySeconds: 15
           periodSeconds: 10
           exec:
-            command: ["/cartservice_probe"]
+            command: ["/bin/grpc_health_probe", "-addr=:7070"]
 ---
 apiVersion: v1
 kind: Service

kubernetes-manifests/frontend.yaml

@@ -38,7 +38,7 @@ spec:
           livenessProbe:
             initialDelaySeconds: 10
             httpGet:
-              path: "/"
+              path: "/_healthz"
               port: 8080
               httpHeaders:
               - name: "Cookie"