Added Prometheus + Grafana for metrics collection

Author: Mikalai Alimenkou

compose.yaml

@@ -59,4 +59,33 @@ services:
       - "4316:4318"  # OTLP HTTP
     depends_on:
       elastic:
-        condition: service_healthy
+        condition: service_healthy
+
+  prometheus:
+    image: prom/prometheus:v3.7.1
+    container_name: library-prometheus
+    command:
+      - '--config.file=/etc/prometheus/prometheus.yml'
+      - '--storage.tsdb.path=/prometheus'
+      - '--web.console.libraries=/etc/prometheus/console_libraries'
+      - '--web.console.templates=/etc/prometheus/consoles'
+    volumes:
+      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml:ro
+    ports:
+      - "9090:9090"
+    extra_hosts:
+      - "host.docker.internal:host-gateway"
+
+  grafana:
+    image: grafana/grafana:12.2.1
+    container_name: library-grafana
+    environment:
+      - GF_SECURITY_ADMIN_USER=admin
+      - GF_SECURITY_ADMIN_PASSWORD=xpinjection
+      - GF_USERS_ALLOW_SIGN_UP=false
+    volumes:
+      - ./grafana/datasources:/etc/grafana/provisioning/datasources:ro
+    ports:
+      - "3000:3000"
+    depends_on:
+      - prometheus

grafana/datasources/prometheus.yml

@@ -0,0 +1,12 @@
+apiVersion: 1
+
+datasources:
+  - name: Prometheus
+    type: prometheus
+    access: proxy
+    url: http://prometheus:9090
+    isDefault: true
+    editable: true
+    jsonData:
+      timeInterval: 5s
+      queryTimeout: 60s

prometheus/prometheus.yml

@@ -0,0 +1,18 @@
+global:
+  scrape_interval: 15s
+  evaluation_interval: 15s
+  external_labels:
+    monitor: 'library-monitor'
+
+scrape_configs:
+  - job_name: 'library-application'
+    metrics_path: '/admin/prometheus'
+    scrape_interval: 5s
+    basic_auth:
+      username: admin
+      password: xpinjection
+    static_configs:
+      - targets: ['host.docker.internal:8080']
+        labels:
+          application: 'library'
+          environment: 'local-dev'

src/main/resources/application-admin.yaml

@@ -11,6 +11,10 @@ spring:
     enabled: true
 
 management:
+  prometheus:
+    metrics:
+      export:
+        enabled: true
   observations:
     annotations:
       enabled: true
@@ -61,7 +65,11 @@ management:
       enabled: true
     process:
       enabled: true
-  metrics:
     distribution:
       percentiles-histogram:
-        http.server.requests: true
+        http.server.requests: true
+
+server:
+  tomcat:
+    mbeanregistry:
+      enabled: true