Springboot JVM监控 通过Promethus

Springboot内置了对Prometheus得支持，可以监测得点有：

• JVM各指标参数（GC，堆，非堆等）
• 接口调用次数，延时
• 系统内存，IO，CPU使用率

部署Prometheus和Grafana

准备一台2核4G或以上配置得linux系统（centos7.9、ubuntu18.04或更高版本），按下面得方式部署Prometheus和Grafana

#下载镜像
docker pull prom/prometheus
docker pull grafana/grafana

#将docker里的配置拷出来
docker run --name=grafana -d  -p 3000:3000 -itd grafana/grafana
mkdir -p /docker/prometheus/grafana/data
mkdir -p /docker/prometheus/grafana
docker cp grafana:/etc/grafana/grafana.ini /docker/prometheus/grafana/

#写Prometheus配置文件
vim prometheus.yml
global:
  scrape_interval:     15s 
  evaluation_interval: 15s 

scrape_configs:
  - job_name: 'prometheus'
    static_configs:
      - targets: ['localhost:9090']
  - job_name: "ProvideAPIServices"
    scrape_interval: 5s
    metrics_path: "/actuator/prometheus"
    static_configs:
            - targets: ["172.16.0.88:8789","172.16.0.69:8789"]


#启动Prometheus
docker run -d --name prometheus -p 9090:9090 -v /root/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus

#启动grafana
docker run -d -p 3000:3000 --name grafana  --restart=always -v /docker/prometheus/grafana/grafana.ini:/etc/grafana/grafana.ini -v /docker/prometheus/grafana/data:/var/lib/grafana -e "GF_SECURITY_ADMIN_PASSWORD=admin" grafana/grafana

注意两个地方 

metrics_path: "/actuator/prometheus"   #这里填java服务得请求路径+/actuator/prometheus，如果加了前缀，如 context-path: /abc，则为/abc/actuator/prometheus

["172.16.0.88:8789","172.16.0.69:8789"]  #172.16.0.88:8789 为java服务ip+断开

修改pom.xml

加入下面依赖

jdk<=11

<dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-prometheus</artifactId>
            <scope>runtime</scope>
</dependency>

jdk>=17

<dependency>
    <groupId>io.prometheus</groupId>
    <artifactId>simpleclient_pushgateway</artifactId>
</dependency>

修改application.xml

management:
  endpoints:
    web:
      exposure:
        include: "*"   
  endpoint:
    prometheus:
      enabled: true #激活prometheus
    health:
      show-details: always
  metrics:
    export:
      prometheus:
        enabled: true

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