报告spring boot执行器的健康状态作为指标

Question

我想要报告应用程序的健康状态作为量规，并且我希望使用与spring-boot-actuator相同的健康指示器，但是，我没有看到任何可以在这里使用的来自spring-boot-actuator依赖项的可导出组件。

我想写的代码是：

@Component
public class HealthCounterMetric {
  private final Counter statusCounter;

  public HealthCounterMetric(MeterRegistry meterRegistry, SystemHealth systemHealth) {
    this.statusCounter = meterRegistry.counter("service.status");
  }

  @Scheduled(fixedRate = 30000L)
  public void reportHealth() {
    //do report health
  }
}

当然，SystemHealth不是导出的bean。spring boot执行器会导出我可以这样消费的bean吗？

Answer 1

参考文档describes how to do this by mapping the HealthEndpoint's response to a gauge

@Configuration(proxyBeanMethods = false)
public class MyHealthMetricsExportConfiguration {

    public MyHealthMetricsExportConfiguration(MeterRegistry registry, HealthEndpoint healthEndpoint) {
        // This example presumes common tags (such as the app) are applied elsewhere
        Gauge.builder("health", healthEndpoint, this::getStatusCode).strongReference(true).register(registry);
    }

    private int getStatusCode(HealthEndpoint health) {
        Status status = health.health().getStatus();
        if (Status.UP.equals(status)) {
            return 3;
        }
        if (Status.OUT_OF_SERVICE.equals(status)) {
            return 2;
        }
        if (Status.DOWN.equals(status)) {
            return 1;
        }
        return 0;
    }

}