prometheus监控运行在k8s中的java应用

 

想要监控k8s中的Java应用总共分以下几步

 

1. 下载并配置监控组件jmx_exporter
2. Dockerfile编写、docker build构建、上传harbor
3. prometheus配置

1、下载jmx_exporter，下载地址https://github.com/prometheus/jmx_exporter/releases

2、编写jmx_exporter配置文件

ssl: false
lowercaseOutputName: false
lowercaseOutputLabelNames: false

3、Dockerfile中添加jmx_prometheus_javaagent-0.20.0.jar与prometheus-jmx-config.yaml

FROM eclipse-temurin:11-jdk-alpine

LABEL maintainer="xxx"

ADD prometheus-jmx-config.yaml /prometheus-jmx-config.yaml
ADD jmx_prometheus_javaagent-0.20.0.jar  /jmx_prometheus_javaagent-0.20.0.jar

ADD spring-boot-helloworld-*-SNAPSHOT.jar /applications/spring-boot-helloworld.jar

ENV JAVA_OPTS="-javaagent:/jmx_prometheus_javaagent-0.13.0.jar=12345:/prometheus-jmx-config.yaml"

ENTRYPOINT ["/bin/sh","-c","/opt/java/openjdk/bin/java -jar $JAVA_OPTS  /applications/spring-boot-helloworld.jar --server.port=80"]

4、打包并上传镜像

docker  build . -t harbor-inner.vvtechnology.cn/test/spring-boot-helloworld:v2
docker push harbor-inner.vvtechnology.cn/test/spring-boot-helloworld:v2

4、prometheus配置

##jvm监控
  - job_name: "helloword-jvm"
    scheme: https
    tls_config:
      ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
    bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
    scrape_interval: 5s
    kubernetes_sd_configs:
    - role: endpoints
      api_server: https://172.16.50.161:6443
      namespaces:
        names:
        - default
      tls_config:
        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
    relabel_configs:
    - action: keep
      source_labels:
      - __meta_kubernetes_service_label_app
      regex: helloword
    - action: keep
      source_labels:
      - __meta_kubernetes_endpoint_port_name
      regex: jmx-metrics