▕┃

这里我们想要实现的是让普罗米修斯自动取读取Eureka上的服务信息，然后对服务进行监控。

1.修改Prometheus配置

修改prometheus.yml文件，在scrape_configs节点下添加：

  - job_name: 'eureka'
    metrics_path: '/actuator/prometheus' #springboot默认的actuator路径
    # Scrape Eureka itself to discover new services.
    eureka_sd_configs:
      - server: http://192.168.53.21:8001/eureka #这里是Eureka注册地址
    relabel_configs:
      - source_labels: [__meta_eureka_app_instance_metadata_prometheus_path]
        action: replace
        target_label: __metrics_path__
        regex: (.+)

2.为服务添加bean

import io.micrometer.core.instrument.MeterRegistry;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MetricsConfig {

    @Value("${spring.application.name}")
    private String applicationName;

    @Bean
    public MeterRegistryCustomizer meterRegistryCustomizer() {
        return meterRegistry -> meterRegistry.config().commonTags("application", applicationName);
    }
}

最后服务启动后就可以看到对应服务了。

参考资料：
https://prometheus.io/docs/prometheus/latest/configuration/configuration/#eureka_sd_config