...

- job_name: 'my-service'
  metrics_path: /metrics
  static_configs:
  - targets: ['xxx.xxx.xxx.xxx:yyyy'] //被監(jiān)控應用的url

...

<!-- prometheus -->
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient</artifactId>
		<version>0.3.0</version>
</dependency>
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient_hotspot</artifactId>
		<version>0.3.0</version>
</dependency>
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient_servlet</artifactId>
		<version>0.3.0</version>
</dependency>

import io.prometheus.client.exporter.MetricsServlet;
import io.prometheus.client.hotspot.DefaultExports;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
...

@Configuration
public class PrometheusConfig {

		// ...

		@Bean
		public ServletRegistrationBean servletRegistrationBean(){
			DefaultExports.initialize();
			return new ServletRegistrationBean(new MetricsServlet(), "/metrics");
		}
}

import io.prometheus.client.Counter;
import io.prometheus.client.Gauge;
...

// counter只增不減
static final Counter customizeCounter = Counter.build()
        .name("customize_counter") //定義名稱，名稱可用于搜索
        .help("customize counter") //定義描述
        .register();
customizeCounter.inc(); //當前對象加1

// gauge可增可減
static final Gauge customizeGauge = Gauge.build()
        .name("customize_gauge")
        .help("customize gauge")
        .labelNames("label1", "label2", "label3") //定義標簽名稱，可定義多個
        .register();
customizeGauge.inc(); //當前對象加1
customizeGauge.dec(); //當前對象減1
customizeGauge.labels("value1","value2","value3").set(1100); //設置標簽值，標簽可用于條件篩選

// 此外還有histogram和summary兩種指標

<!-- prometheus -->
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient</artifactId>
		<version>0.3.0</version>
</dependency>
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient_hotspot</artifactId>
		<version>0.3.0</version>
</dependency>
<dependency>
		<groupId>io.prometheus</groupId>
		<artifactId>simpleclient_servlet</artifactId>
		<version>0.3.0</version>
</dependency>

String query = "customize_counter";
String url = "http://[ip]:[port]/api/v1/query?query=" + query + "&time=2019-05-01T20:10:51.781Z";
HttpGet get = new HttpGet(url);
CloseableHttpClient httpClient = HttpClients.custom().build();
CloseableHttpResponse response = httpClient.execute(get);

String query = "rate(customize_counter{label1 = value1}[30s])";
String url = "http://[ip]:[port]/api/v1/query_range?query=" + query + "&start=2019-05-01T20:10:51.781Z&end=2019-05-02T20:10:51.781Z";
HttpGet get = new HttpGet(url);
CloseableHttpClient httpClient = HttpClients.custom().build();
CloseableHttpResponse response = httpClient.execute(get);

public class ComparatorPromData implements Comparator {

    @Override
    public int compare(Object o1, Object o2) {
        List list1 = (List)o1;
        List list2 = (List)o2;
        return ((Integer) list1.get(0)).compareTo(((Integer) list2.get(0)));
    }
}

public class SortUtil {

    public static List sortPromData(List<List> list) {
        ComparatorPromData comparator = new ComparatorPromData();
        Collections.sort(list, comparator);
        return list;
    }
}