How can metrics collection and tracking be configured in a Spring Boot application?

In Spring Boot, the Micrometer library is commonly used for collecting and tracking metrics, and it integrates with Actuator.

Main steps:

1. Add dependencies to pom.xml or build.gradle:

   • spring-boot-starter-actuator
   • micrometer-core and, if necessary, an adapter for the monitoring system (Prometheus, Graphite, etc.)

2. Enable the required Actuator endpoints in application.properties:

   management.endpoints.web.exposure.include=health,metrics,prometheus
   

3. Use built-in metrics or create your own with MeterRegistry:

@Autowired
private MeterRegistry meterRegistry;

public void someMethod() {
    Counter counter = meterRegistry.counter("my_custom_counter");
    counter.increment();
}

4. Metrics can be viewed through HTTP endpoints, such as /actuator/metrics or /actuator/prometheus.

Thus, Micrometer + Actuator make it easy to collect and export metrics from Spring Boot applications.