feat: add promethus metrics support (#25)

Co-authored-by: rick <[email protected]>

README.md

@@ -7,6 +7,12 @@ Run E2E testing:
 make build-image test-e2e
 ```
 
+Run with Maven command:
+
+```shell
+mvn spring-boot:run
+```
+
 ## OpenAPI definition
 You can visit it via: http://localhost:8080/v3/api-docs
 
@@ -17,3 +23,6 @@ You can visit it via: http://localhost:8080/graphiql?path=/graphql
 
 ## tRPC
 The [tRPC](https://github.com/trpc-group/trpc-java) endpoint is: `http://localhost:9090`
+
+## Metrics
+You can visit the metrics endpoint: `/actuator/prometheus`

e2e/test-suite.yaml

@@ -94,3 +94,8 @@ items:
   expect:
     bodyFieldsExpect:
       message: rick
+- name: prometheus
+  request:
+    api: /actuator/prometheus
+    header:
+      Authorization: "{{ .param.auth }}"

pom.xml

@@ -47,6 +47,15 @@
 			<version>1.1.0</version>
         </dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-registry-prometheus</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>

src/main/java/io/github/devopsws/demo/DemoApplication.java

@@ -1,6 +1,7 @@
 package io.github.devopsws.demo;
 
 import com.tencent.trpc.spring.boot.starters.annotation.EnableTRpc;
+
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 

src/main/resources/application.yml

@@ -19,3 +19,13 @@ trpc:
         ip: 0.0.0.0     # Listen ip
         port: 9090       # Listen port
         network: tcp      # Network type, tcp or udp
+
+# https://spring.academy/guides/spring-spring-prometheus
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health, metrics, prometheus
+  metrics:
+    tags:
+      application: ${spring.application.name}