Spring Boot Actuator 整合 Prometheus

簡介

Spring Boot 自帶監控功能 Actuator,能夠幫助實現對程序內部運行狀況監控,好比監控情況、Bean加載狀況、環境變量、日誌信息、線程信息等。這一節結合 Prometheus 、Grafana 來更加直觀的展現這些信息。java

實驗

說明

服務名 地址 端口
Prometheus 172.16.2.101 9090
Grafana 172.16.2.101 3000
Spring Boot Demo 172.16.2.204 8080

建立項目

建立用於測試的 Spring Boot 項目,主要代碼以下。git

pom.xml

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>io.micrometer</groupId>
    <artifactId>micrometer-registry-prometheus</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>

application.yml

management:
  endpoints:
    web:
      exposure:
        include: '*'

  endpoint:
    health:
      show-details: always

  metrics:
    tags:
      application: actuator-demo
  • management.endpoints.web.exposure.include:大多數actuator的端口都不會經過http公開,* 表明公開全部這些端點。對於生產環境,應該仔細選擇要公開的端點。
  • management.metrics.tags.application:爲應用設置 tag ,方便區分不一樣的應用。

啓動類

@SpringBootApplication
@RestController
public class SpringbootActuatorPrometheusDemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootActuatorPrometheusDemoApplication.class, args);
    }

    @RequestMapping(value = "/hello")
    public String  sayHello() {
        for (int i = 1 ; i <= 10 ; i++) {
            Thread t = new Thread(() -> {
                try {
                    Thread.sleep(5000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            } , "HelloThread - " + i);
            t.start();
        }
        return "ok";
    }

    /**
    @Bean
    MeterRegistryCustomizer<MeterRegistry> metricsCommonTags() {
        return registry -> registry.config().commonTags("application", "springboot-actuator-prometheus-demo");
    }
    */

}

配置 Prometheus 和 Grafana

在 prometheus.yml 中添加針對該 Spring Boot 應用 的監控 jobgithub

- job_name: 'actuator-demo'
    metrics_path: '/prometheus'
    static_configs:
    - targets: ['172.16.2.204:8080']

運行 Prometheus 和 Grafana:web

docker start prometheus grafana

訪問 Prometheus UI http://172.16.2.101:9090 ,查看 targets ,能夠看到 job 處於 UP 狀態,說明配置成功了。spring

Spring Boot Actuator 整合 Prometheus

Grafana UI http://172.16.2.101:3000,經過Grafana的 + 圖標導入(Import) JVM (Micrometer) dashboard:docker

  • grafana id = 4701
  • 注意選中prometheus數據源

查看JVM (Micormeter) dashboard:shell

Spring Boot Actuator 整合 Prometheus

能夠看到應用的 JVM 的 堆棧、 線程、 IO 等等信息。springboot

源碼

https://github.com/gf-huanchupk/SpringBootLearning/tree/master/springboot-actuator-prometheusapp

參考

https://micrometer.io/docs/registry/prometheus
https://prometheus.io/docs/prometheuside

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