add prometheus

k8s.yaml

@@ -35,6 +35,10 @@ metadata:
   namespace: backend
   labels:
     app: jenkins-backend-demo
+  annotations:
+    prometheus.io/scrape: 'true'
+    #prometheus.io/path: '/metrics'
+    prometheus.io/port: '30011'
 spec:
   selector:
     app: jenkins-backend-demo

pom.xml

@@ -34,6 +34,30 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<!-- The client -->
+		<dependency>
+			<groupId>io.prometheus</groupId>
+			<artifactId>simpleclient</artifactId>
+			<version>0.9.0</version>
+		</dependency>
+		<!-- Hotspot JVM metrics-->
+		<dependency>
+			<groupId>io.prometheus</groupId>
+			<artifactId>simpleclient_hotspot</artifactId>
+			<version>0.9.0</version>
+		</dependency>
+		<!-- Exposition HTTPServer-->
+		<dependency>
+			<groupId>io.prometheus</groupId>
+			<artifactId>simpleclient_httpserver</artifactId>
+			<version>0.9.0</version>
+		</dependency>
+		<!-- Pushgateway exposition-->
+		<dependency>
+			<groupId>io.prometheus</groupId>
+			<artifactId>simpleclient_pushgateway</artifactId>
+			<version>0.9.0</version>
+		</dependency>
 	</dependencies>
 	
 	<build>

spring-boot-docker.iml

@@ -80,5 +80,11 @@
     <orderEntry type="library" name="Maven: org.springframework:spring-jcl:5.0.4.RELEASE" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.springframework:spring-test:5.0.4.RELEASE" level="project" />
     <orderEntry type="library" scope="TEST" name="Maven: org.xmlunit:xmlunit-core:2.5.1" level="project" />
+    <orderEntry type="library" name="Maven: io.prometheus:simpleclient:0.9.0" level="project" />
+    <orderEntry type="library" name="Maven: io.prometheus:simpleclient_hotspot:0.9.0" level="project" />
+    <orderEntry type="library" name="Maven: io.prometheus:simpleclient_httpserver:0.9.0" level="project" />
+    <orderEntry type="library" name="Maven: io.prometheus:simpleclient_common:0.9.0" level="project" />
+    <orderEntry type="library" name="Maven: io.prometheus:simpleclient_pushgateway:0.9.0" level="project" />
+    <orderEntry type="library" name="Maven: javax.xml.bind:jaxb-api:2.3.0" level="project" />
   </component>
 </module>

src/main/java/com/neo/controller/DockerController.java

@@ -2,12 +2,38 @@ package com.neo.controller;
 
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
+import io.prometheus.client.Counter;
+
 
 @RestController
 public class DockerController {
+    // Counter
+//    static final Counter requests = Counter.build()
+//            .name("requests_total").help("Total requests.").register();
+
+    static final Counter requests = Counter.build()
+            .name("my_library_requests_total").help("Total requests.")
+            .labelNames("method").register();
+
 	
+    @RequestMapping("/metrics")
+    public String indexmetrics() {
+        // Counter
+//        requests.inc();
+
+        requests.labels("get").inc();
+
+        return "Hello metrics! ";
+    }
+
+
     @RequestMapping("/")
     public String index() {
+        // Counter
+//        requests.inc();
+
+        requests.labels("get").inc();
+
         return "Hello Docker! ";
     }
 }