java - Spring Boot执行器健康端点+动态弹性4j断路器

Question

我有一个 Spring Boot 应用程序，它使用 resilience4j基于AOP @CircuitBreaker s。

现在我想在 /actuator/health 端点中提供断路器的信息，但我没有看到 details. CircuitBtreakers 对象 described in the docs在 JSON 输出中。

我做错了什么？

<小时/>

相比之下，让动态缓存信息出现在 /actuator/metrics 端点中需要少量的自定义接线，但这就是 well documented 。我想知道是否有类似的技巧可以应用于动态定义的 @CircuitBreaker 注册到 /actuator/health 端点。

MyService.java:

@Service
public class MyService {
    @Autowired
    private CacheManager cacheManager;
    @Autowired
    private CacheMetricsRegistrar cacheMetricsRegistrar;

    @PostConstruct
    public void postConstruct() {
        // On-the-fly defined (annotation-based) caches are not auto-registered with micrometer metrics.
        final Cache cache = cacheManager.getCache("myCache");
        cacheMetricsRegistrar.bindCacheToRegistry(cache);
    }

    @CircuitBreaker(name = "myCB", fallbackMethod = "fallbackCallAnApi")
    public String callAnApi() throws RestClientException {
        // ...
    }

    @Cacheable("myCache")
    public String getSomethingCacheable() {
        // ...
    }
}

application.properties:

resilience4j.circuitbreaker.configs.default.registerHealthIndicator=true
management.endpoints.web.expose=health,metrics
management.endpoints.web.exposure.include=health,metrics
management.endpoint.health.enabled=true
management.endpoint.metrics.enabled=true
management.metrics.enable.resilience4j.circuitbreaker.calls=true
management.health.circuitbreakers.enabled=true

Answer 1

目前无法为 HealthIndicator 端点动态注册 CircuitBreaker。不幸的是你必须配置它们:

resilience4j.circuitbreaker:
    configs:
        default:
            registerHealthIndicator: true
    instances:
        myCB:
            baseConfig: default

你可以说这是一个错误。

https://github.com/resilience4j/resilience4j/blob/master/resilience4j-spring-boot2/src/main/java/io/github/resilience4j/circuitbreaker/monitoring/health/CircuitBreakersHealthIndicator.java#L99-L102