Spring Boot 2.0.0.M6: Show all metrics with one request

Question

With Spring Boot 2.0.0.M6 and the new actuator metrics endpoint, when I request

GET /application/metrics

the only the names of the metrics are shown

{
  "names" : [ "data.source.active.connections", "jvm.buffer.memory.used", "jvm.memory.used", "jvm.buffer.count", "logback.events", "process.uptime", "jvm.memory.committed", "data.source.max.connections", "http.server.requests", "system.load.average.1m", "jvm.buffer.total.capacity", "jvm.memory.max", "process.start.time", "cpu", "data.source.min.connections" ]
}

Clearly I can access a specific metric using GET /application/metrics/jvm.memory.used

But is there a way to see all metrics with one request?

Answer 1

That's how the metrics endpoint behaves in the Spring Boot 2.0.0M* releases. There are only two read operations defined in the endpoint class :

• ListNamesResponse listNames()
  • Resolves to GET /application/metrics
• MetricResponse metric(@Selector String requiredMetricName, @Nullable List<String> tag)
  • Resolves to GET /application/metrics/jvm.memory.used

Metrics support has changed quite dramatically in 2.x (now backed by Micrometer ) and the Spring Boot 2.x upgrade guide is lacking any details on metrics at the moment but it's a work in progress, so presumably more details will arive as Spring Boot 2.0 gets closer to a GA release.

I suspect the move from hierarchical metrics to dimensional metrics resulted in the maintainers deeming the 1.x (hierarchical) metrics display to be no longer viable/suitable.

Answer 2

Spring boot 2 has removed this functionality by default, but if this is requirement of your application then this custom implementation will serve your purpose: https://github.com/csankhala/spring-metrics-grabber

Add dependency in you application from local repository

compile("org.springframework.boot:spring-metrics-grabber:1.0.0-SNAPSHOT");
compile("org.springframework.boot:spring-boot-starter-actuator");

Add MetricxEndpoint.class to @SpringBootApplication scan path

import org.springframework.metricx.controller.MetricxEndpoint;

@SpringBootApplication(scanBasePackageClasses = { MetricxEndpoint.class, YourSpringBootApplication.class })
public class YourSpringBootApplication {
    public static void main(String[] args) {
        new SpringApplication(YourSpringBootApplication.class).run(args);
    }
}

All Metrics will be published on '/metricx' endpoint with name and value both

Pattern search is also supported eg '/metricx/jvm.*'