Prometheus-JVM-编程知识

在这里插入图片描述

一. JVM监控

通过 jmx_exporter 启动端口来实现JVM的监控

Github

Kubernetes Deployment Java 服务，修改

wget https://repo1.maven.org/maven2/io/prometheus/jmx/jmx_prometheus_javaagent/0.19.0/jmx_prometheus_javaagent-0.19.0.jar# 编写配置文件，我是通过 hostPath 方式挂进 pod 中的
lowercaseOutputLabelNames: true
lowercaseOutputName: true
whitelistObjectNames: ["java.lang:type=OperatingSystem"]
rules:- pattern: 'java.lang<type=OperatingSystem><>((?!process_cpu_time)\w+):'name: os_$1type: GAUGEattrNameSnakeCase: true# 加入启动参数，其他部分省略，只看增加的spec:containers:- command:- java- -javaagent:/home/prometheus/jmx/jmx_prometheus_javaagent-0.19.0.jar=9999:/home/prometheus/jmx/config.yml		# 加入启动参数，指定端口为9999，并指定配置文件volumeMounts:        - mountPath: /home/prometheus/jmxname: jmxvolumes:- hostPath:path: /home/prometheus/jmxtype: ""name: jmx

Service 修改或增加

apiVersion: v1
kind: Service
metadata:annotations:					# Service加入2行注释prometheus.io/jvm: "true"prometheus.io/port: "9999"name: yff-uef-apinamespace: yff
spec:ports:- name: httpport: 8080protocol: TCPtargetPort: 8080- name: jmx-metrices			# 并增加jmx所暴露的端口port: 9999protocol: TCPtargetPort: 9999selector:name: yff-uef-apiservice/env: prodtype: ClusterIP

Prometheus 增加 jvm 的配置

    - job_name: 'jvm'kubernetes_sd_configs:- role: endpointsrelabel_configs:- source_labels: [__meta_kubernetes_service_annotation_prometheus_io_jvm]action: keepregex: true- source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port]action: replacetarget_label: __address__regex: ([^:]+)(?::\d+)?;(\d+)replacement: $1:$2- source_labels: [__meta_kubernetes_service_name]action: replaceregex: (.+)target_label: applicationreplacement: $1- action: labelmapregex: __meta_kubernetes_service_label_(.+)

Grafana 增加面板

可以在官网寻找面板 JXM dashboard
如下是我的 dashboard json信息

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"value"},{"options": {"match": "null","result": {"text": "DOWN"}},"type": "special"}],"thresholds": {"mode": "absolute","steps": [{"color": "#d44a3a","value": null},{"color": "#e24d42","value": 0},{"color": "#299c46","value": 1}]},"unit": "none"},"overrides": []},"gridPos": {"h": 4,"w": 3,"x": 3,"y": 0},"hideTimeOverride": false,"id": 21,"links": [{"targetBlank": true,"title": "Tomcat dashboard","url": "/d/chanjarster-tomcat-dashboard/tomcat-dashboard?$__url_time_range&$__all_variables"}],"maxDataPoints": 100,"options": {"colorMode": "value","graphMode": "none","justifyMode": "auto","orientation": "horizontal","reduceOptions": {"calcs": ["lastNotNull"],"fields": "","values": false},"textMode": "auto"},"pluginVersion": "9.5.7","targets": [{"datasource": {"uid": "$datasource"},"expr": "up{job=\"$job\",instance=\"$instance\"}","format": "time_series","instant": true,"intervalFactor": 1,"refId": "A"}],"title": "Status","type": "stat"},{"datasource": {"uid": "$datasource"},"fieldConfig": 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}