Added example with metrics and logging

.gitignore

@@ -18,6 +18,7 @@ coverage*
 # Ignore example binaries
 examples/configurableListener/configurableListener
 examples/basicListener/basicListener
+examples/metricListener/metricListener
 
 # Ignore the various build artifacts
 .ignore

examples/metricListener/Dockerfile.local

@@ -0,0 +1,22 @@
+FROM golang:alpine as builder
+MAINTAINER Kristina Spring <kristina_spring@comcast.com>
+
+WORKDIR /go/src/github.com/xmidt-org/wrp-listener/examples/metricListener
+
+RUN apk add --update git curl
+
+COPY . .
+
+RUN go build -o metricListener_linux_amd64
+
+FROM alpine
+
+RUN apk --no-cache add ca-certificates
+RUN mkdir -p /etc/metricListener
+VOLUME /etc/metricListener
+
+EXPOSE 8080
+
+COPY --from=builder /go/src/github.com/xmidt-org/wrp-listener/examples/metricListener/metricListener_linux_amd64 /
+COPY docFiles/metricListener.yaml /
+ENTRYPOINT ["/metricListener_linux_amd64"]

examples/metricListener/docFiles/metricListener.yaml

@@ -0,0 +1,40 @@
+---
+primary:
+  address: ":443"
+pprof:
+  address: ":9999"
+  readTimeout: "15s"
+  idleTimeout: "15s"
+metric:
+  address: ":9390"
+  metricsOptions:
+    namespace: "test"
+    subsystem: "listener"
+  readTimeout: "15s"
+  idleTimeout: "15s"
+log:
+  file: "/var/log/metricListener/metricListener.log"
+  level: "INFO"
+  json: "true"
+# log:
+#   file: "stdout"
+#   level: "INFO"
+#   json: true
+
+authHeader: "X-Webpa-Signature"
+authDelimiter: "="
+webhookRequest:
+  config:
+    url: "http://localhost:443/api/v1/endpoint"
+    secret: "super secret"
+  events: ["device-status.*"]
+webhookRegistrationURL: "https://localhost:8090/api/v2/hook"
+webhookTimeout: "1m"
+webhookRegistrationInterval: "1m"
+endpoint: "/endpoint"
+responseCode: 202
+jwt:
+  requestHeaders: 
+  authURL: ""
+  timeout: 1m
+  buffer: 5s

examples/metricListener/docFiles/prometheus.yml

@@ -0,0 +1,41 @@
+---
+# my global config
+global:
+  scrape_interval: 1s      # Set the scrape interval to every 15 seconds. Default is every 1 minute.
+  evaluation_interval: 1s  # Evaluate rules every 15 seconds. The default is every 1 minute.
+  # scrape_timeout is set to the global default (10s).
+
+  # Attach these labels to any time series or alerts when communicating with
+  # external systems (federation, remote storage, Alertmanager).
+  external_labels:
+    monitor: 'codelab-monitor'
+
+# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
+# rule_files:
+#   - "first.rules"
+#   - "second.rules"
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+      - targets: ['localhost:9090']
+
+  - job_name: 'docker'
+      # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+      - targets: ['localhost:9323']
+  - job_name: 'metriclistener'
+      # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+
+    static_configs:
+      - targets: ['localhost:9390']

examples/metricListener/docker-compose.yml

@@ -0,0 +1,31 @@
+version: '3.4'
+
+services:
+  # metriclistener:
+  #   image: listener:${LISTENER_VERSION}
+  #   container_name: metriclistener
+  #   restart: on-failure
+  #   ports:
+  #     - 7100:7100
+  #     - 7101:7101
+  #     - 7102:7102
+  #     - 7103:7103
+  #   volumes:
+  #     - ./docFiles/metricListener.yaml:/etc/metricListener/metricListener.yaml
+  #     - ./docFiles/public.pem:/etc/metricListener/public.pem
+  #   networks:
+  #     - back-tier
+
+  prometheus:
+    image: prom/prometheus
+    container_name: prometheus
+    networks:
+      - back-tier
+    ports:
+      - 9090:9090
+    volumes:
+      - ./docFiles/prometheus.yml:/prometheus-data/prometheus.yml
+    command:  --config.file=/prometheus-data/prometheus.yml
+
+networks:
+  back-tier:

examples/metricListener/go.mod

@@ -0,0 +1,22 @@
+module github.com/xmidt-org/wrp-listener/examples/metricListener
+
+go 1.12
+
+require (
+	github.com/Comcast/webpa-common v1.3.0 // indirect
+	github.com/VividCortex/gohistogram v1.0.0 // indirect
+	github.com/c9s/goprocinfo v0.0.0-20190309065803-0b2ad9ac246b // indirect
+	github.com/go-kit/kit v0.8.0
+	github.com/goph/emperror v0.17.2
+	github.com/gorilla/mux v1.7.3
+	github.com/influxdata/influxdb v1.7.7 // indirect
+	github.com/justinas/alice v0.0.0-20171023064455-03f45bd4b7da
+	github.com/pkg/errors v0.8.1 // indirect
+	github.com/prometheus/client_golang v1.0.0 // indirect
+	github.com/spf13/pflag v1.0.3
+	github.com/spf13/viper v1.4.0
+	github.com/xmidt-org/bascule v0.3.1
+	github.com/xmidt-org/webpa-common v1.3.0
+	github.com/xmidt-org/wrp-listener v0.1.1
+	golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2 // indirect
+)