docker: add prometheus/example-golang-random to docker-compose blocks

docker/blocks/prometheus/docker-compose.yaml

@@ -23,3 +23,9 @@
     network_mode: host
     ports:
       - "9093:9093"
+
+  prometheus-random-data:
+    build: blocks/prometheus_random_data
+    network_mode: host
+    ports:
+      - "8080:8080"

docker/blocks/prometheus/prometheus.yml

@@ -25,11 +25,15 @@ scrape_configs:
   - job_name: 'node_exporter'
     static_configs:
       - targets: ['127.0.0.1:9100']
- 
+
   - job_name: 'fake-data-gen'
     static_configs:
       - targets: ['127.0.0.1:9091']
-  
+
   - job_name: 'grafana'
     static_configs:
       - targets: ['127.0.0.1:3000']
+
+  - job_name: 'prometheus-random-data'
+    static_configs:
+      - targets: ['127.0.0.1:8080']

docker/blocks/prometheus2/docker-compose.yaml

@@ -23,3 +23,9 @@
     network_mode: host
     ports:
       - "9093:9093"
+
+  prometheus-random-data:
+    build: blocks/prometheus_random_data
+    network_mode: host
+    ports:
+      - "8080:8080"

docker/blocks/prometheus2/prometheus.yml

@@ -25,11 +25,15 @@ scrape_configs:
   - job_name: 'node_exporter'
     static_configs:
       - targets: ['127.0.0.1:9100']
- 
+
   - job_name: 'fake-data-gen'
     static_configs:
       - targets: ['127.0.0.1:9091']
-  
+
   - job_name: 'grafana'
     static_configs:
       - targets: ['127.0.0.1:3000']
+
+  - job_name: 'prometheus-random-data'
+    static_configs:
+      - targets: ['127.0.0.1:8080']

docker/blocks/prometheus_random_data/Dockerfile

+# This Dockerfile builds an image for a client_golang example.
+
+# Builder image, where we build the example.
+FROM golang:1.9.0 AS builder
+# Download prometheus/client_golang/examples/random first
+RUN go get github.com/prometheus/client_golang/examples/random
+WORKDIR /go/src/github.com/prometheus/client_golang
+WORKDIR /go/src/github.com/prometheus/client_golang/prometheus
+RUN go get -d
+WORKDIR /go/src/github.com/prometheus/client_golang/examples/random
+RUN CGO_ENABLED=0 GOOS=linux go build -a -tags netgo -ldflags '-w'
+
+# Final image.
+FROM scratch
+LABEL maintainer "The Prometheus Authors <prometheus-developers@googlegroups.com>"
+COPY --from=builder /go/src/github.com/prometheus/client_golang/examples/random .
+EXPOSE 8080
+ENTRYPOINT ["/random"]