【K8S基础】jconsole、jvisualvm等远程连接K8S java pod

快来打我* 2023-09-24 18:11 157阅读 0赞

## Dockerfile ##

FROM openjdk:8-jdk-alpine
    ENV TZ=Asia/Shanghai
    RUN set -eux; \
        ln -snf /usr/share/zoneinfo/$TZ /etc/localtime; \
        echo $TZ > /etc/timezone
    ARG JAR_FILE="start-0.0.1-SNAPSHOT.jar"    
    ENV JAVA_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=32767 -Dcom.sun.management.jmxremote.rmi.port=32767 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.local.only=false -Djava.rmi.server.hostname=192.168.222.101  
    VOLUME /tmp
    COPY ${JAR_FILE} app.jar
    EXPOSE 32767 8889
    ENTRYPOINT java ${JAVA_OPTS} -jar /app.jar

*  `192.168.222.101`为Master节点IP
 *  NodePort暴露的端口需与`32767`一致

docker build --build-arg JAR_FILE=start-0.0.1-SNAPSHOT.jar -t zhangxueliang2020/jmx-test:0213 .

## K8S:service ##

[root@m-0 ~]# kubectl get  svc jmx-test -o yaml
    apiVersion: v1
    kind: Service
    metadata:
      creationTimestamp: "2023-02-13T13:17:03Z"
      labels:
        app: jmx-test
      name: jmx-test
      namespace: default
      resourceVersion: "784703613"
      uid: 06546bc4-b46b-4909-847f-8363728fc0be
    spec:
      clusterIP: 10.102.213.230
      clusterIPs:
      - 10.102.213.230
      externalTrafficPolicy: Cluster
      internalTrafficPolicy: Cluster
      ipFamilies:
      - IPv4
      ipFamilyPolicy: SingleStack
      ports:
      - name: jmx
        nodePort: 32767
        port: 32767
        protocol: TCP
        targetPort: 32767
      - name: app
        nodePort: 32089
        port: 8889
        protocol: TCP
        targetPort: 8889
      selector:
        app: jmx-test
      sessionAffinity: None
      type: NodePort
    status:
      loadBalancer: {
        }

## K8S:Deployment ##

[root@m-0 ~]# kubectl get deploy jmx-test -oyaml
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      annotations:
        deployment.kubernetes.io/revision: "10"
      creationTimestamp: "2023-02-13T11:52:00Z"
      generation: 10
      labels:
        app: jmx-test
      name: jmx-test
      namespace: default
      resourceVersion: "783818165"
      selfLink: /apis/apps/v1/namespaces/default/deployments/jmx-test
      uid: 93e95d0f-13a0-4ff4-8216-6ba6a37b611f
    spec:
      progressDeadlineSeconds: 600
      replicas: 1
      revisionHistoryLimit: 10
      selector:
        matchLabels:
          app: jmx-test
      strategy:
        rollingUpdate:
          maxSurge: 25%
          maxUnavailable: 25%
        type: RollingUpdate
      template:
        metadata:
          annotations:
            kubectl.kubernetes.io/restartedAt: "2023-02-13T23:27:38+08:00"
          creationTimestamp: null
          labels:
            app: jmx-test
        spec:
          containers:
          - image: zhangxueliang2020/jmx-test:0213
            imagePullPolicy: Always
            name: jmx-test
            ports:
            - containerPort: 32767
              name: tcp-jmx
              protocol: TCP
            - containerPort: 8889
              name: app
              protocol: TCP
            resources: {
        }
            terminationMessagePath: /dev/termination-log
            terminationMessagePolicy: File
          dnsPolicy: ClusterFirst
          restartPolicy: Always
          schedulerName: default-scheduler
          securityContext: {
        }
          terminationGracePeriodSeconds: 30
    status:
      availableReplicas: 1
      conditions:
      - lastTransitionTime: "2023-02-13T11:52:02Z"
        lastUpdateTime: "2023-02-13T11:52:02Z"
        message: Deployment has minimum availability.
        reason: MinimumReplicasAvailable
        status: "True"
        type: Available
      - lastTransitionTime: "2023-02-13T11:52:00Z"
        lastUpdateTime: "2023-02-13T15:27:40Z"
        message: ReplicaSet "jmx-test-556b8b7d88" has successfully progressed.
        reason: NewReplicaSetAvailable
        status: "True"
        type: Progressing
      observedGeneration: 10
      readyReplicas: 1
      replicas: 1
      updatedReplicas: 1