gRPC service

.gitignore

@@ -59,3 +59,8 @@ typings/
 
 # next.js build output
 .next
+
+# gontador
+.vscode
+vendor
+gontador

Dockerfile

@@ -1,13 +1,18 @@
-FROM docker.tools.pnet.ch/r-base:latest
+FROM golang:latest AS builder
 
-RUN yum install -y nodejs && yum clean all
-USER baseuser
+# Download and install the latest release of dep
+ADD https://github.com/golang/dep/releases/download/v0.5.0/dep-linux-amd64 /usr/bin/dep
+RUN chmod +x /usr/bin/dep
 
-WORKDIR /app
-ADD node_modules node_modules
-
-CMD [ "node", "index.js"]
+# 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 -v
+COPY . ./
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix nocgo -o /app github.com/philipsahli/gontador/src
 
 EXPOSE 3000
 
-ADD index.js .
+FROM scratch
+COPY --from=builder /app ./
+ENTRYPOINT ["./app"]

Gopkg.toml

@@ -0,0 +1,46 @@
+# Gopkg.toml example
+#
+# Refer to https://golang.github.io/dep/docs/Gopkg.toml.html
+# for detailed Gopkg.toml documentation.
+#
+# required = ["github.com/user/thing/cmd/thing"]
+# ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
+#
+# [[constraint]]
+#   name = "github.com/user/project"
+#   version = "1.0.0"
+#
+
+# [[constraint]]
+#   name = "github.com/user/project2"
+#   branch = "dev"
+#   source = "github.com/myfork/project2"
+#
+# [[override]]
+#   name = "github.com/x/y"
+#   version = "2.4.0"
+#
+# [prune]
+#   non-go = false
+#   go-tests = true
+#   unused-packages = true
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/golang/protobuf"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/almariah/go-graphite-client"
+
+[[constraint]]
+  name = "github.com/go-redis/redis"
+  version = "6.14.2"
+
+[[constraint]]
+  name = "github.com/gorilla/mux"
+  version = "1.6.2"
+
+[prune]
+  go-tests = true
+  unused-packages = true

README.md

@@ -1,2 +1,62 @@
 # contador
+
 A 12-factor counter microservice
+
+Exposes an HTTP-API and a gRPC Interface.
+
+## Dependant services
+
+**Telegraf**
+
+Run somewhere a simple tcp listener to mock a telegraf daemon.
+
+    nc -l 2003
+
+**Redis**
+
+Run somewhere a docker container with an unsecured redis daemon.
+
+     docker run --name gontador-redis -p 6379:6379 -d redis
+
+
+## Test local
+
+    go build -o gontador src/*.go 
+    REDIS_URL=192.168.1.2:6379 METRIC_HOST=192.168.1.2 METRIC_PORT=2003 ./gontador
+
+### 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
+
+    URL=`oc get route.route.openshift.io/gontador  -o go-template --template={{.spec.host}}`
+
+    curl -v $URL/counter
+
+## Undeploy
+
+    oc delete all -l app=gontador
+    oc delete template gontador-template
+
+## Generate grpc service
+
+     PROTOC_ZIP=protoc-3.3.0-osx-x86_64.zip\ncurl -OL https://github.com/google/protobuf/releases/download/v3.3.0/$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.sh

@@ -1,10 +1,10 @@
 #!/bin/sh
-docker build -t docker.pnet.ch/misc/contador .
-docker push docker.pnet.ch/misc/contador:latest
-if oc get dc | grep contador -q; then 
-    oc import-image contador
+docker build -t docker.pnet.ch/misc/gontador .
+docker push docker.pnet.ch/misc/gontador:latest
+if oc get dc | grep gontador -q; then 
+    oc import-image gontador
 else
     oc create -f template.yaml
-    oc new-app --template=contador-template
-    oc expose service/contador
+    oc new-app --template=gontador-template
+    oc expose service/gontador
 fi

deploy/build.yaml

@@ -0,0 +1,50 @@
+apiVersion: build.openshift.io/v1
+kind: BuildConfig
+metadata:
+  # annotations:
+  #   description: Defines how to build the application
+    # template.alpha.openshift.io/wait-for-ready: 'true'
+  # labels:
+  #   app: gontador
+  #   template: gontador
+  name: gontador-build
+  # namespace: gontador
+spec:
+  # failedBuildsHistoryLimit: 5
+  # nodeSelector: null
+  output:
+    to:
+      kind: ImageStreamTag
+      name: 'gontador:latest'
+  # postCommit:
+  #   script: ./manage.py test
+  # resources: {}
+  # runPolicy: Serial
+  source:
+    git:
+      uri: 'https://github.com/philipsahli/gontador.git'
+      ref: 'grpc-service'
+    type: Git
+  strategy:
+    type: Docker
+    dockerStrategy:
+      dockerfilePath: Dockerfile
+
+      # env:
+      #   - name: PIP_INDEX_URL
+      # from:
+      #   kind: ImageStreamTag
+      #   name: 'python:3.6'
+      #   namespace: openshift
+
+  # successfulBuildsHistoryLimit: 5
+  triggers:
+    - imageChange:
+      type: ImageChange
+    - type: ConfigChange
+    - github:
+        secret: 4tqgB6gCvDQBoWBiKtNcm3NsT37MM602KhLGKrCR
+      type: GitHub
+# status:
+#   lastVersion: 1
+