prometheus監控java項目（jvm等）：k8s外、k8s內

本文轉載自查看原文 2021-12-15 17:02 2979 d3-5 - jvm（jmap、jstack、jstat、jconsole、jvisualVM、jprofiler、mat）/ b9 - kubernetes(k8s)、rancher

前言

雖然可以使用jvisualvm之類的工具監控java項目，但是集群環境下，還是捉襟見肘，下面介紹如何用主流的prometheus來監控java項目。

java項目配置

在pom.xml中添加依賴

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!--暴露histogram-->
        <dependency>
            <groupId>io.micrometer</groupId>
            <artifactId>micrometer-registry-prometheus</artifactId>
            <version>1.5.1</version>
            <!--<version>1.1.3</version>-->
        </dependency>
        <!-- 可選, 用於進程內存使用圖表 -->
        <dependency>
            <groupId>io.github.mweirauch</groupId>
            <artifactId>micrometer-jvm-extras</artifactId>
            <version>0.2.0</version>
        </dependency>

修改spring boot配置(application.yml)

（下面management默認內容也是，可以不配）

server:
  port: 8096

spring:
  application:
    name: gift

management:
  endpoint:
    health:
      show-details: always
  endpoints:
    web:
      exposure:
        include: 'prometheus'  # 暴露/actuator/prometheus
  metrics:
    tags:
      application: ${spring.application.name}  # 暴露的數據中添加application label

非k8s下java項目監控

打包：mvn clean package

啟動項目：java -jar xxx.jar

請求：http://xxx:8096/qzcsbj/actuator/prometheus，查看暴露的數據

在Prometheus中添加配置：vim prometheus.yml

  - job_name: "gift"
    metrics_path: "/qzcsbj/actuator/prometheus"
    static_configs:
    - targets: ["qzcsbj:8096"]

重啟prometheus：systemctl restart prometheus

訪問prometheus：http://ip:9090/targets

targets下可以看到這個端點

grafana導入模板：4701

效果如下：

其它參考：非k8s下java項目監控

https://www.cnblogs.com/uncleyong/p/16335583.html

k8s下java項目監控

打包：mvn clean package -Dmaven.test.skip=true

打鏡像：docker build -t 192.168.117.160/gifts/gift:v1 .

把鏡像推送到鏡像倉庫：docker push 192.168.117.160/gifts/gift:v1

編寫資源yaml文件：deploy和svc

vim gift.yaml

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: gift-java-deploy
  namespace: gift
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: gift
  template:
    metadata:
      labels:
        k8s-app: gift
    spec:
      imagePullSecrets:
      - name: gifts-registry

      containers:
      - name: gift
        image: 192.168.117.160/gifts/gift:v1215
        imagePullPolicy: IfNotPresent
        ports:
        - containerPort: 8096

---
apiVersion: v1
kind: Service
metadata:
  name: gift-java-deploy-svc
  namespace: gift
  labels:
    k8s-app: gift-java-deploy-svc
spec:
  type: ClusterIP
  selector:
    k8s-app: gift
  ports:
  - name: gift-java-deploy-svc-api
    port: 8096
    targetPort: 8096
    protocol: TCP

創建資源：kubectl apply -f gift.yaml

查看資源：kubectl get all -n gift

編寫servicemonitor資源yaml文件：

vim gift-sm.yaml

---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: java-servicemonitor
  namespace: monitoring
  labels:
    k8s-app: gift
spec:
  endpoints:
  - port: gift-java-deploy-svc-api
    interval: 30s
    scheme: http
    path: '/qzcsbj/actuator/prometheus'
  selector:
    matchLabels:
      k8s-app: gift-java-deploy-svc
  namespaceSelector:
    matchNames:
    - gift

創建資源：kubectl apply -f gift-sm.yaml