Spring Boot 2.2.2 - Prometheus not working in Actuator

Question

I've upgraded my Spring Boot application to the latest 2.2.2 Boot version. Since then, I only have a metrics endpoint but no Prometheus.

My build.gradle.kts file has org.springframework.boot:spring-boot-starter-actuator as dependency, I also added io.micrometer:micrometer-registry-prometheus as the reference suggests (Prometheus endpoint).

My application.yml looks like the following:

management:
  server:
    port: 9000
  endpoints:
    web:
      exposure:
        include: health, shutdown, prometheus
  endpoint:
    shutdown:
      enabled: true

Can someone guide me to the right direction?

Edit: It was working in Spring Boot 2.2.0. This is the link to download an identical project: link

Edit 2: I can verify that it works with 2.2.1 as well.

Answer 1

I followed your setup, I created a project from this project loaded Spring Boot 2.2.2.RELEASE, I added the following dependency for Prometheus

implementation("io.micrometer:micrometer-registry-prometheus")

Also I added the following configuration in application.yml

management:
  server:
    port: 9000
  endpoints:
    web:
      exposure:
        include: health, shutdown, prometheus
  endpoint:
    shutdown:
      enabled: true

When the application starts you will see the following info which shows you that 3 endpoints are exposed (health, shutdown and prometheus).

2020-01-05 23:48:19.489  INFO 7700 --- [           main] o.s.b.a.e.web.EndpointLinksResolver      : Exposing 3 endpoint(s) beneath base path '/actuator'

And used Postman for method GET this endpoint http://localhost:9000/actuator/prometheus and it works well. I created a repository by following these steps here So please let me know what error is displayed, or what happens when you don't get the expected result so that I can help and edit this answer.