SpringBoot使用prometheus监控

1.关于Prometheus
Prometheus是一个根据应用的metrics来进行监控的开源工具。相信很多工程都在使用它来进行监控，有关详细介绍可以查看官网：https://prometheus.io/docs/introduction/overview/。
2.有关Grafana
Grafana是一个开源监控利器，如图所示。

从图中就可以看出来，使用Grafana监控很高大上，提供了很多可视化的图标。
官网地址：https://grafana.com/
3.SpringBoot使用Prometheus
3.1 依赖内容
在SpringBoot中使用Prometheus其实很简单，不需要配置太多的东西，在pom文件中加入依赖，完整内容如下所示。

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">     <modelVersion>4.0.0</modelVersion>     <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>2.1.3.RELEASE</version>         <relativePath/> <!-- lookup parent from repository -->     </parent>     <groupId>com.dalaoyang</groupId>     <artifactId>springboot2_prometheus</artifactId>     <version>0.0.1-SNAPSHOT</version>     <name>springboot2_prometheus</name>     <description>springboot2_prometheus</description>      <properties>         <java.version>1.8</java.version>     </properties>      <dependencies>         <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>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-test</artifactId>             <scope>test</scope>         </dependency>         <dependency>             <groupId>io.micrometer</groupId>             <artifactId>micrometer-registry-prometheus</artifactId>             <version>1.1.3</version>         </dependency>     </dependencies>      <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build>  </project>

3.2 配置文件
配置文件中加入配置，这里就只进行一些简单配置，management.metrics.tags.application属性是本文配合Grafana的Dashboard设置的，如下所示：

spring.application.name=springboot_prometheus management.endpoints.web.exposure.include=* management.metrics.tags.application=${spring.application.name}

3.3 设置application
修改启动类，如下所示.

@SpringBootApplication public class Springboot2PrometheusApplication {      public static void main(String[] args) {         SpringApplication.run(Springboot2PrometheusApplication.class, args);     }     @Bean     MeterRegistryCustomizer<MeterRegistry> configurer(             @Value("${spring.application.name}") String applicationName) {         return (registry) -> registry.config().commonTags("application", applicationName);     } }

SpringBoot项目到这里就配置完成了，启动项目，访问http://localhost:8080/actuator/prometheus，如图所示，可以看到一些度量指标。

4.Prometheus配置
4.1 配置应用
在prometheus配置监控我们的SpringBoot应用，完整配置如下所示。

# my global config global:   scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.   evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.   # scrape_timeout is set to the global default (10s).  # Alertmanager configuration alerting:   alertmanagers:   - static_configs:     - targets:       # - alertmanager:9093  # Load rules once and periodically evaluate them according to the global 'evaluation_interval'. rule_files:   # - "first_rules.yml"   # - "second_rules.yml"  # A scrape configuration containing exactly one endpoint to scrape: # Here it's Prometheus itself. scrape_configs:   - job_name: 'prometheus'     static_configs:     - targets: ['127.0.0.1:9090'] ###以下内容为SpringBoot应用配置   - job_name: 'springboot_prometheus'     scrape_interval: 5s     metrics_path: '/actuator/prometheus'     static_configs:       - targets: ['127.0.0.1:8080']

4.2 启动Prometheus
启动Prometheus，浏览器访问，查看Prometheus页面，如图所示。