Task 14 : Integrate Prometheus and Grafana

Author: Rapter1990

Dockerfile

@@ -0,0 +1,28 @@
+# ---------- Stage 1: Build ----------
+FROM maven:3.9.11-amazoncorretto-25 AS build
+
+# Work dir
+WORKDIR /build
+
+# Copy Maven descriptor + wrapper dir first to leverage layer caching
+COPY pom.xml .
+COPY .mvn .mvn
+
+# Copy sources and build
+COPY src src
+RUN mvn -q clean package -DskipTests
+
+# ---------- Stage 2: Runtime ----------
+FROM amazoncorretto:25
+
+# Work dir
+WORKDIR /app
+
+# Copy the built JAR
+COPY --from=build /build/target/*.jar cryptoexchangeapi.jar
+
+# Service port
+EXPOSE 1927
+
+# Run with preview features enabled (Java 25)
+ENTRYPOINT ["java", "--enable-preview", "-jar", "cryptoexchangeapi.jar"]

data/prometheus/config/prometheus.yml

@@ -0,0 +1,23 @@
+global:
+  scrape_interval: 120s # By default, scrape targets every 15 seconds.
+  evaluation_interval: 120s # By default, scrape targets every 15 seconds.
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: 'prometheus'
+    # Override the global default and scrape targets from this job every 5 seconds.
+    scrape_interval: 5s
+    # metrics_path defaults to '/metrics'
+    # scheme defaults to 'http'.
+    static_configs:
+      - targets: ['localhost:9090']
+
+  - job_name: 'Spring Boot Application input'
+    metrics_path: '/actuator/prometheus'
+    scrape_interval: 2s
+    static_configs:
+      - targets: [ 'cryptoexchangeapi:1927' ]
+        labels:
+          application: 'Crypto Exchange Api'

docker-compose.yml

@@ -0,0 +1,68 @@
+services:
+
+  mongodb:
+    image: "mongo:latest"
+    container_name: mongo-container
+    restart: always
+    ports:
+      - "27017:27017"
+    volumes:
+      - mongodb_data_container:/data/db
+    networks:
+      - cryptoexchangeapinetwork
+
+
+  cryptoexchangeapi:
+    image: 'cryptoexchangeapi:latest'
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: cryptoexchangeapi
+    restart: on-failure
+    env_file:
+      - .env  # Use the .env file for environment variables
+    ports:
+      - "1927:1927"
+    environment:
+      - server.port=1927
+      - spring.data.mongodb.host=mongodb
+      - spring.data.mongodb.port=${MONGO_DB_PORT}
+      - spring.data.mongodb.database=${MONGO_DB_NAME}
+    depends_on:
+      - mongodb
+    networks:
+      - cryptoexchangeapinetwork
+
+  prometheus:
+    image: prom/prometheus:latest
+    container_name: prometheus
+    restart: unless-stopped
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./data/prometheus/config:/etc/prometheus/
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+    networks:
+      - cryptoexchangeapinetwork
+
+  grafana:
+    image: "grafana/grafana-oss:latest"
+    pull_policy: always
+    container_name: grafana
+    restart: unless-stopped
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./data/grafana:/var/lib/grafana
+    environment:
+      - GF_SECURITY_ADMIN_PASSWORD=admin
+      - GF_SERVER_DOMAIN=localhost
+    networks:
+      - cryptoexchangeapinetwork
+
+volumes:
+  mongodb_data_container:
+
+networks:
+  cryptoexchangeapinetwork:

pom.xml

@@ -129,6 +129,17 @@
 			<artifactId>spring-boot-starter-validation</artifactId>
 		</dependency>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-registry-prometheus</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+
 	</dependencies>
 
 	<build>

src/main/resources/application.yml

@@ -53,3 +53,16 @@ logging:
   level:
     org.springframework.cache: TRACE
     org.springframework.cache.interceptor: TRACE
+
+# Prometheus
+management:
+  endpoints:
+    web:
+      exposure:
+        include:
+          - "*"
+          - prometheus
+  prometheus:
+    metrics:
+      export:
+        enabled: true