Add health checks to Node.js services (#26)

* Move Node healthchecks to gRPC

* gitignore proto files

* Switch to standard health RPC

* Fix lint

* Update client.js

* Add protos back + update them

* node services: fix & run genproto.sh

this gets currencyservice to work but paymentservice is still crashing
in the docker container.

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

* Fix docker breaking

* update dockerfiles with released health probe

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

kubernetes-manifests/currencyservice.yaml

@@ -30,13 +30,11 @@ spec:
         - name: grpc
           containerPort: 7000
         readinessProbe:
-          periodSeconds: 5
-          tcpSocket:
-            port: 7000
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7000"]
         livenessProbe:
-          periodSeconds: 5
-          tcpSocket:
-            port: 7000
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:7000"]
         resources:
           requests:
             cpu: 100m

kubernetes-manifests/paymentservice.yaml

@@ -29,13 +29,11 @@ spec:
         ports:
         - containerPort: 50051
         readinessProbe:
-          periodSeconds: 5
-          tcpSocket:
-            port: 50051
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
         livenessProbe:
-          periodSeconds: 5
-          tcpSocket:
-            port: 50051
+          exec:
+            command: ["/bin/grpc_health_probe", "-addr=:50051"]
         resources:
           requests:
             cpu: 100m