feat: metrics can be listed in prometheus

README.md

@@ -161,3 +161,13 @@ To stop container run
 ```bash
 docker-compose down
 ```
+
+## Collecting Metrics
+
+To collect the metrics in an automated way we use Prometheus.
+First, make sure that every service you want to observe is running on predefined port.
+Then run Prometheus in docker with respect to location of `prometheus.yml` file:
+
+```bash
+docker run --rm --name prometheus -p 9090:9090 -v ${PWD}/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus:v2.43.0 --config.file=/etc/prometheus/prometheus.yml
+```

core/pom.xml

@@ -165,6 +165,12 @@
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
 
+        <!--		Prometheus dependency -->
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-registry-prometheus</artifactId>
+        </dependency>
+
     </dependencies>
 
 </project>
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core/src/main/resources/application.properties

@@ -13,7 +13,7 @@ spring.cache.type=NONE
 spring.profiles.active=dev
 appconfig.enablecache=false
 
-management.endpoints.web.exposure.include=info,health,metrics,loggers,beans,env
+management.endpoints.web.exposure.include=info,health,metrics,loggers,beans,env,prometheus
 management.endpoint.health.show-details=always
 management.endpoint.health.show-components=always
 management.endpoint.health.probes.enabled=true

prometheus.yml

+global:
+  scrape_interval: 1s
+  external_labels:
+    monitor: 'my-monitor'
+
+scrape_configs:
+  - job_name: 'prometheus'
+    static_configs:
+      - targets: ['127.0.0.1:9090']
+  - job_name: 'formula-core'
+    metrics_path: /actuator/prometheus
+    static_configs:
+      - targets: [host.docker.internal:8080]
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