expose prometheus metrics, add health endpoint

build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
-	id("org.springframework.boot") version "3.2.4"
-	id("io.spring.dependency-management") version "1.1.4"
+	id("org.springframework.boot") version "3.2.10"
+	id("io.spring.dependency-management") version "1.1.6"
 
 	jacoco
 
@@ -22,7 +22,7 @@ repositories {
 }
 
 dependencies {
-	api("org.springframework.boot:spring-boot-starter-data-jdbc:3.2.4")
+	api("org.springframework.boot:spring-boot-starter-data-jdbc:3.2.10")
 
 	implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.15.4")
 	implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.15.4")
@@ -32,16 +32,19 @@ dependencies {
 	implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.3")
 	implementation("org.postgresql:postgresql:42.6.2")
 	implementation("org.springdoc:springdoc-openapi-starter-webmvc-ui:2.6.0")
-	implementation("org.springframework.boot:spring-boot-starter-mustache:3.2.4")
-	implementation("org.springframework.boot:spring-boot-starter-validation:3.2.4")
-	implementation("org.springframework.boot:spring-boot-starter-web:3.2.4")
+	implementation("org.springframework.boot:spring-boot-starter-actuator:3.2.10")
+	implementation("org.springframework.boot:spring-boot-starter-mustache:3.2.10")
+	implementation("org.springframework.boot:spring-boot-starter-validation:3.2.10")
+	implementation("org.springframework.boot:spring-boot-starter-web:3.2.10")
 	implementation("org.springframework.kafka:spring-kafka:3.1.3")
 
+	runtimeOnly("io.micrometer:micrometer-registry-prometheus")
+
 	developmentOnly("org.springframework.boot:spring-boot-devtools")
 
 	testImplementation("org.jetbrains.kotlin:kotlin-test-junit5:2.0.20")
 	testImplementation("org.mockito.kotlin:mockito-kotlin:5.4.0")
-	testImplementation("org.springframework.boot:spring-boot-starter-test:3.2.4")
+	testImplementation("org.springframework.boot:spring-boot-starter-test:3.2.10")
 	testImplementation("org.springframework.kafka:spring-kafka-test:3.1.3")
 	testImplementation("org.testcontainers:junit-jupiter:1.19.7")
 	testImplementation("org.testcontainers:testcontainers:1.19.7")

checklist.md

@@ -3,9 +3,9 @@ Some simple checklist for this demo repo:
 - [x] make migrations
 - [x] make repository and models
 - [x] make crud api
-- [ ] make openapi documentation generation
+- [x] make openapi documentation generation
 - [x] connect to kafka to produce events
 - [x] make kafka consumer
 - [ ] register prometheus metrics
-- [ ] expose prometheus metrics
+- [x] expose prometheus metrics
 - [ ] add otel collector

doc/examples/management/health.md

@@ -0,0 +1,4 @@
+```shell
+curl --request GET \
+     --url 'http://localhost:8080/health'
+```

doc/examples/management/metrics.md

@@ -0,0 +1,18 @@
+Метрики приложения в формате prometheus:
+
+```shell
+curl --request GET \
+     --url 'http://localhost:8081/metrics'
+```
+
+Список доступных для отображения метрик приложения:
+```shell
+curl --request GET \
+     --url 'http://localhost:8081/spring-metrics'
+```
+
+Значение конкретной метрики:
+```shell
+curl --request GET \
+     --url 'http://localhost:8081/spring-metrics/<metric-name>' 
+```

src/main/resources/application.yml

@@ -33,3 +33,23 @@ springdoc:
     path: /doc/openapi
   swagger-ui:
     path: /doc/swagger-ui.html
+
+management:
+  server:
+    port: 8081
+  endpoints:
+    web:
+      base-path: /
+      path-mapping:
+        metrics: spring-metrics
+        prometheus: metrics
+        info: version
+      exposure:
+        include: health,prometheus,info,metrics
+  endpoint:
+    health:
+      show-details: always
+  metrics:
+    distribution:
+      percentiles-histogram:
+        "[http.server.requests]": true