Merge pull request #18 from microservices-demo/enhancement/opentracing

Enhancement/opentracing

docker-compose-zipkin.yml

+version: '2'
+
+services:
+  carts:
+    image: weaveworksdemos/carts
+    hostname: carts
+    restart: always
+    cap_drop:
+      - all
+    cap_add:
+      - NET_BIND_SERVICE
+    read_only: true
+    tmpfs:
+      - /tmp:rw,noexec,nosuid
+    environment:
+      - reschedule=on-node-failure
+      - ZIPKIN=zipkin
+    ports:
+      - "8081:80"
+  zipkin:
+    image: openzipkin/zipkin 
+    hostname: zipkin
+    restart: always
+    cap_drop:
+      - all
+    cap_add:
+      - CHOWN
+      - SETGID
+      - SETUID
+    read_only: true
+    tmpfs:
+      - /tmp:rw,noexec,nosuid
+    environment:
+      - reschedule=on-node-failure
+    ports:
+      - "9411:9411"

pom.xml

@@ -35,6 +35,11 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
+	<dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-zipkin</artifactId>
+            <version>1.1.0.RELEASE</version>
+        </dependency>
         <dependency>
             <groupId>io.prometheus</groupId>
             <artifactId>simpleclient</artifactId>

src/main/resources/application.properties

 server.port=${port:8081}
 spring.data.mongodb.uri=mongodb://${db:cart-db}:27017/data
 endpoints.health.enabled=false
+spring.zipkin.baseUrl=http://${zipkin:zipkin}:9411/
+spring.sleuth.sampler.percentage=1.0
+spring.application.name=carts