Java云计算：监控和日志记录最佳实践

import io.micrometer.core.annotation.Timed;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MyController {
    @Timed
    @GetMapping("/")
    public String home() {
        return "Hello, world!";
    }
}

<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

# Grafana dashboard configuration
dashboardSections:
  - title: My App Monitoring
    panels:
      - title: Request Latency
        type: graph
        datasource: Prometheus
        targets:
          - expr: histogram_quantile(0.99, sum(rate(http_server_requests_seconds_bucket[5m])))
            legend: Latency (99th percentile)

import io.jaegertracing.Configuration;
import io.jaegertracing.ScopeManager;
import io.jaegertracing.internal.samplers.ConstSampler;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DistributedController {
    private static final Logger logger = LogManager.getLogger();

    // Configure Jaeger tracer
    static {
        Configuration config = new Configuration("my-app")
                .withSampler(new ConstSampler(true))
                .withScopeManager(new ScopeManager());
        Tracer tracer = config.getTracer();
    }

    @GetMapping("/distributed")
    public String distributed() {
        Span span = Tracer.currentSpan();
        logger.info("Span ID: {}", span.getSpanId());
        return "Distributed request";
    }
}

<dependency>
    <groupId>io.jaegertracing</groupId>
    <artifactId>jaeger-spring-boot-starter</artifactId>
</dependency>

# Jaeger configuration
spring.sleuth.exporter=jaeger
spring.sleuth.jaeger.sampler.param=true