add gRPC service

.gitignore

@@ -63,4 +63,4 @@ typings/
 # gontador
 .vscode
 vendor
-main
+gontador

Dockerfile

@@ -7,7 +7,7 @@ RUN chmod +x /usr/bin/dep
 # Copy the code from the host and compile it
 WORKDIR $GOPATH/src/github.com/philipsahli/gontador/
 COPY Gopkg.toml Gopkg.lock ./
-RUN dep ensure --vendor-only
+RUN dep ensure --vendor-only -v
 COPY . ./
 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /app github.com/philipsahli/gontador/src
 

Gopkg.toml

@@ -10,6 +10,7 @@
 #   name = "github.com/user/project"
 #   version = "1.0.0"
 #
+
 # [[constraint]]
 #   name = "github.com/user/project2"
 #   branch = "dev"
@@ -24,6 +25,9 @@
 #   go-tests = true
 #   unused-packages = true
 
+[[constraint]]
+  branch = "master"
+  name = "github.com/golang/protobuf"
 
 [[constraint]]
   branch = "master"

README.md

@@ -1,17 +1,20 @@
 # contador
+
 A 12-factor counter microservice
 
-## Services
+Exposes an HTTP-API and a gRPC Interface.
+
+## Dependant services
 
-### Telegraf
+**Telegraf**
 
-Run somewhere
+Run somewhere a simple tcp listener to mock a telegraf daemon.
 
     nc -l 2003
 
-### Redis
+**Redis**
 
-Run somewhere
+Run somewhere a docker container with an unsecured redis daemon.
 
      docker run --name gontador-redis -p 6379:6379 -d redis
 
@@ -23,8 +26,20 @@ Run somewhere
 
 ### HTTP Interface
 
+A HTTP/1.1 GET request to `/counter` increments the counter by 1 and returns the new counter.
+
     curl http://localhost:3000/counter
 
+### gRPC Service
+
+Gonsumidor increments the counter by 1 and prints out the counter every 2 seconds. Communication over gRPC to the service on port `3001`.
+
+    git clone https://github.com/philipsahli/gonsumidor.git
+    cd gonsumidor && go build -o gonsumidor main.go
+    go build -o gonsumidor main.go
+
+See https://github.com/philipsahli/gonsumidor/blob/master/README.md
+
 ## Test on Openshift
 
     bash -xe deploy/deploy.sh
@@ -37,3 +52,11 @@ Run somewhere
 
     oc delete all -l app=gontador
     oc delete template gontador-template
+
+## Generate grpc service
+
+     PROTOC_ZIP=protoc-3.3.0-osx-x86_64.zip\ncurl -OL https://github.com/google/protobuf/releases/download/v3.3.0/$PROTOC_ZIP\nsudo unzip -o $PROTOC_ZIP -d /usr/local bin/protoc\nrm -f $PROTOC_ZIP
+     go get  -u github.com/golang/protobuf/protoc-gen-go
+
+     protoc -I service/ service/gontador.proto --go_out=plugins=grpc:service
+

deploy/deploy.sh

@@ -1,4 +1,4 @@
-#!/bin/bash -xe
+#!/bin/bash -x
 
 # Build docker image in openshift
 # oc apply -f imagestream.yaml

deploy/route.yaml

@@ -6,18 +6,18 @@ metadata:
   creationTimestamp: '2018-12-31T10:24:53Z'
   labels:
     app: gontador
-  name: gontador
+  name: gontador-http
   namespace: gontador
   resourceVersion: '58060'
   selfLink: /apis/route.openshift.io/v1/namespaces/gontador/routes/gontador
   uid: 50250017-0ce6-11e9-8918-2215dd3699dc
 spec:
   host: gontador-gontador.192.168.64.7.nip.io
   port:
-    targetPort: gontador
+    targetPort: gontador-http
   to:
     kind: Service
-    name: gontador
+    name: gontador-http
     weight: 100
   wildcardPolicy: None
 status:

deploy/service.yaml

@@ -1,23 +1,51 @@
 apiVersion: v1
-kind: Service
-metadata:
-  annotations:
-    description: Exposes the gontador service
-  creationTimestamp: '2018-12-31T06:50:19Z'
-  labels:
-    app: gontador
-  name: gontador
-  namespace: gontador
-  resourceVersion: '3000'
-spec:
-  ports:
-    - name: gontador
-      port: 3000
-      protocol: TCP
-      targetPort: 3000
-  selector:
-    app: gontador
-  sessionAffinity: None
-  type: ClusterIP
-status:
-  loadBalancer: {}
+kind: List
+items:
+- apiVersion: v1
+  kind: Service
+  metadata:
+    annotations:
+      description: Exposes the gontador service
+    creationTimestamp: '2018-12-31T06:50:19Z'
+    labels:
+      app: gontador
+    name: gontador-http
+    namespace: gontador
+    resourceVersion: '3000'
+  spec:
+    ports:
+      - name: gontador-http
+        port: 3000
+        protocol: TCP
+        targetPort: 3000
+      # - name: gontador-grpc
+      #   port: 3001
+      #   protocol: TCP
+      #   targetPort: 3001
+    selector:
+      app: gontador
+    sessionAffinity: None
+    type: ClusterIP
+  status:
+    loadBalancer: {}
+- apiVersion: v1
+  kind: Service
+  metadata:
+    annotations:
+      description: Exposes the gontador grpc service
+    creationTimestamp: '2018-12-31T06:50:19Z'
+    labels:
+      app: gontador
+    name: gontador-grpc
+    namespace: gontador
+    resourceVersion: '3000'
+  spec:
+    ports:
+      - name: gontador-grpc
+        port: 3001
+        nodePort: 30001
+    selector:
+      app: gontador
+    type: NodePort
+  status:
+    loadBalancer: {}

deploy/template.yaml

@@ -4,22 +4,44 @@ metadata:
   creationTimestamp: null
   name: gontador-template
 objects:
+- apiVersion: v1
+  kind: Service
+  metadata:
+    annotations:
+      description: Exposes the gontador grpc service
+    labels:
+      app: gontador
+    name: gontador-grpc
+    namespace: gontador
+  spec:
+    ports:
+      - name: gontador-grpc
+        port: 3001
+        nodePort: 30001
+    selector:
+      app: gontador
+    type: NodePort
+  status:
+    loadBalancer: {}
 - apiVersion: v1
   kind: Service
   metadata:
     annotations:
       description: Exposes the gontador service
-    creationTimestamp: '2018-12-31T06:50:19Z'
     labels:
       app: gontador
-    name: gontador
+    name: gontador-http
     namespace: gontador
   spec:
     ports:
-      - name: gontador
+      - name: gontador-http
         port: 3000
         protocol: TCP
         targetPort: 3000
+      # - name: gontador-grpc
+      #   port: 3001
+      #   protocol: TCP
+      #   targetPort: 3001
     selector:
       app: gontador
     sessionAffinity: None