2020
https://medium.com/swlh/monitoring-spring-boot-application-with-micrometer-prometheus-and-grafana-using-custom-metrics-9d33de107ad8
    https://habr.com/ru/company/otus/blog/650871/
https://www.mokkapps.de/blog/monitoring-spring-boot-application-with-micrometer-prometheus-and-grafana-using-custom-metrics/

dependencies {
    compile 'org.springframework.boot:spring-boot-starter-actuator'

    // runtime 'io.micrometer:micrometer-spring-legacy:1.0.0-rc.4'
    runtime 'io.micrometer:micrometer-registry-prometheus'
    runtime 'io.micrometer:micrometer-registry-jmx'
}