feat: 프로메테우스, 그라파나 컴포즈 추가

sns_service/.gitignore

@@ -46,3 +46,10 @@ out/
 # Ignore redis binary dump (dump.rdb) files
 
 *.rdb
+
+### prometheus ###
+prometheus/config/**.log
+prometheus/volume/data/
+
+### grafana ###
+grafana/

sns_service/build.gradle.kts

@@ -1,47 +1,49 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
-	id("org.springframework.boot") version "3.1.2"
-	id("io.spring.dependency-management") version "1.1.2"
-	kotlin("jvm") version "1.8.22"
-	kotlin("plugin.spring") version "1.8.22"
+    id("org.springframework.boot") version "3.1.2"
+    id("io.spring.dependency-management") version "1.1.2"
+    kotlin("jvm") version "1.8.22"
+    kotlin("plugin.spring") version "1.8.22"
 }
 
 group = "2joryu"
 version = "0.0.1-SNAPSHOT"
 
 java {
-	sourceCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_17
 }
 
 configurations {
-	compileOnly {
-		extendsFrom(configurations.annotationProcessor.get())
-	}
+    compileOnly {
+        extendsFrom(configurations.annotationProcessor.get())
+    }
 }
 
 repositories {
-	mavenCentral()
+    mavenCentral()
 }
 
 dependencies {
-	implementation("org.springframework.boot:spring-boot-starter-web")
-	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
-	implementation("org.jetbrains.kotlin:kotlin-reflect")
-	implementation ("org.springframework.boot:spring-boot-starter-data-jpa")
-	compileOnly("org.projectlombok:lombok")
-	annotationProcessor("org.projectlombok:lombok")
-	testImplementation("org.springframework.boot:spring-boot-starter-test")
-	runtimeOnly("com.mysql:mysql-connector-j")
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+    implementation("org.jetbrains.kotlin:kotlin-reflect")
+    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+    implementation("org.springframework.boot:spring-boot-starter-actuator")
+    implementation("io.micrometer:micrometer-registry-prometheus")
+    compileOnly("org.projectlombok:lombok")
+    annotationProcessor("org.projectlombok:lombok")
+    testImplementation("org.springframework.boot:spring-boot-starter-test")
+    runtimeOnly("com.mysql:mysql-connector-j")
 }
 
 tasks.withType<KotlinCompile> {
-	kotlinOptions {
-		freeCompilerArgs += "-Xjsr305=strict"
-		jvmTarget = "17"
-	}
+    kotlinOptions {
+        freeCompilerArgs += "-Xjsr305=strict"
+        jvmTarget = "17"
+    }
 }
 
 tasks.withType<Test> {
-	useJUnitPlatform()
+    useJUnitPlatform()
 }

sns_service/docker-compose.yaml

@@ -10,3 +10,27 @@ services:
       MYSQL_DATABASE: sns-db
       MYSQL_ROOT_PASSWORD: 1234
     command: [ '--character-set-server=utf8mb4', '--collation-server=utf8mb4_unicode_ci' ]
+
+  prometheus:
+    image: "prom/prometheus:v2.47.0"
+    container_name: prometheus
+    volumes:
+      - ./prometheus/config:/etc/prometheus
+      - ./prometheus/volume:/prometheus
+    ports:
+      - "9091:9090"
+    command:
+      - '--web.enable-lifecycle' # api 재시작없이 설정파일들을 reload 할 수 있게 해줌
+      - '--config.file=/etc/prometheus/prometheus.yaml'
+      - '--web.console.libraries=/etc/prometheus/console_libraries'
+      - '--web.console.templates=/etc/prometheus/consoles'
+    restart: always
+
+  grafana:
+    image: "grafana/grafana:9.4.7"
+    container_name: grafana
+    ports:
+      - "3001:3000"
+    volumes:
+      - ./grafana/volume:/var/lib/grafana
+    restart: always

sns_service/prometheus/config/prometheus.yaml

@@ -0,0 +1,24 @@
+global:
+  scrape_interval: 15s     # scrap target의 기본 interval을 15초로 변경 / default = 1m
+  scrape_timeout: 15s      # scrap request 가 timeout 나는 길이 / default = 10s
+  evaluation_interval: 2m  # rule 을 얼마나 빈번하게 검증하는지 / default = 1m
+
+  external_labels:
+    monitor: 'ktwitter-monitor'       # 기본적으로 붙여줄 라벨
+  query_log_file: query_log_file.log # prometheus의 쿼리 로그들을 기록, 없으면 기록안함
+
+rule_files:
+  - "rule.yml"  # 파일 위치는 prometheus.yaml 이 있는 곳과 동일 위치
+
+scrape_configs:
+  - job_name: "prometheus"
+    static_configs:
+      - targets:
+          - "localhost:9090"
+  - job_name: "springboot"
+    metrics_path: "/actuator/prometheus"
+    scheme: 'http'
+    scrape_interval: 5s
+    static_configs:
+      - targets:
+          - "localhost:8080"

sns_service/prometheus/config/rule.yaml

@@ -0,0 +1,18 @@
+groups:
+  - name: ktwitter
+    rules:
+      - alert: InstanceDown
+        expr: up == 0
+        for: 5m
+        labels:
+          severity: page
+        annotations:
+          summary: "Instance {{ $labels.instance }} down"
+          description: "{{ $labels.instance }} of job {{ $labels.job }} has been down for more than 5 minutes."
+
+      - alert: APIHighRequestLatency
+        expr: api_http_request_latencies_second{quantile="0.5"} > 1
+        for: 10m
+        annotations:
+          summary: "High request latency on {{ $labels.instance }}"
+          description: "{{ $labels.instance }} has a median request latency above 1s (current value: {{ $value }}s)"

sns_service/src/main/resources/application.yaml

@@ -13,3 +13,9 @@ spring:
         show_sql: true
         format_sql: true
         dialect: org.hibernate.dialect.MySQL8Dialect
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: "prometheus"