在 Kubernetes 环境中 debug Java 程序

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服务端

Docker 镜像启动命令

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CMD ["java", "-Dfile.encoding=utf-8", "-jar", "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005", "/opt/app.jar"]

K8s pod

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apiVersion: apps/v1beta1
kind: Deployment
metadata:
  name: oss
spec:
  replicas: 1
  template:
    metadata:
      labels:
        titans: oss
    spec:
      containers:
      - name: titans-oss
        image: 172.31.21.226/isoftone/titans-oss
        imagePullPolicy: Always
        ports:
        - containerPort: 8008
          name: "web"
        - containerPort: 5005
          name: "jvm-debug"

启动以后查看 pod

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$ kubectl get pod -o wide
NAME                       READY     STATUS    RESTARTS   AGE       IP             NODE
oss-d74785795-fb2h2        1/1       Running   0          15m       10.244.1.112   k8s-node-1

本地

连接

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$ kubectl port-forward oss-d74785795-fb2h2 5005:5005
Forwarding from 127.0.0.1:5005 -> 5005

打开 IDEA，确保以下参数，然后 debug