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。

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']