[Bug]: 单pvc 多副本无法实现各节点的日志持久化

[lyc1995452]

Is there an existing issue for this?

• I have searched the existing issues

Environment

- Milvus version:2.6.7
- Deployment mode(standalone or cluster):cluster

Current Behavior

我通过helm工具进行分布式部署的时候，将每个组件datanode querynode 起多个副本时候，进行保存不同的日志，并持久化，但是现在出现：
datanode-0.log mixture-0.log proxy-0.log querynode-0.log streamingnode-0.log
我的部署脚本如下：
`apiVersion: batch/v1
kind: Job
metadata:
name: milvus-cluster-deployer
namespace: staging
spec:
backoffLimit: 3
template:
metadata:
labels:
app: milvus-deployer
spec:
serviceAccountName: milvus-deployer
restartPolicy: Never
nodeSelector:
kubernetes.io/hostname: master
containers:
- name: deployer
image: m.daocloud.io/docker.io/milvus-deployer:v1.7.2
imagePullPolicy: IfNotPresent
command: ["/bin/sh", "-c"]
args:
- |
set -e
echo "🎯 Generating custom values.yaml..."
cat >/tmp/custom-values.yaml <<'EOF'
cluster:
enabled: true
replicas: 1
standalone:
enabled: false
pulsarv3:
enabled: false
woodpecker:
enabled: true
log:
persistence:
enabled: true
mountPath: /milvus/logs
persistentVolumeClaim:
existingClaim: ygt-data

      # 2. 为每个组件单独配置独立目录
      streamingNode:
        replicas: 2
        extraEnv:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        persistence:
          mountPath: /milvus/logs
          subPathExpr: "milvus-logs/$(POD_NAME)"  # 动态解析
        resources:
          requests:
            cpu: 100m
            memory: 512Mi

      dataNode:
        enabled: true
        replicas: 2
        extraEnv:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        persistence:
          mountPath: /milvus/logs
          subPathExpr: "milvus-logs/$(POD_NAME)"  # 动态解析
        resources:
          requests:
            cpu: 100m
            memory: 1Gi

      queryNode:
        replicas: 2
        extraEnv:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        persistence:
          mountPath: /milvus/logs
          subPathExpr: "milvus-logs/$(POD_NAME)"  # 动态解析
        resources:
          requests:
            cpu: 100m
            memory: 512Mi

      proxy:
        replicas: 2
        extraEnv:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        persistence:
          mountPath: /milvus/logs
          subPathExpr: "milvus-logs/$(POD_NAME)"  # 动态解析
        resources:
          requests:
            cpu: 100m
            memory: 256Mi

      mixCoordinator:
        activeStandby:
          enabled: true
        replicas: 2
        extraEnv:
          - name: POD_NAME
            valueFrom:
              fieldRef:
                fieldPath: metadata.name
        persistence:
          mountPath: /milvus/logs
          subPathExpr: "milvus-logs/$(POD_NAME)"  # 动态解析
        resources:
          requests:
            cpu: 100m
            memory: 256Mi

      etcd:
        enabled: false

      externalEtcd:
        enabled: true
        endpoints:
          - http://prod-etcd-0.prod-etcd-svc.staging.svc.cluster.local:2379
          - http://prod-etcd-1.prod-etcd-svc.staging.svc.cluster.local:2379
          - http://prod-etcd-2.prod-etcd-svc.staging.svc.cluster.local:2379

      minio:
        enabled: false

      externalS3:
        enabled: true
        host: prod-minio-svc.staging.svc.cluster.local
        port: 9000
        accessKey: admin
        secretKey: supersecret123
        useSSL: false
        bucketName: milvus-bucket
      EOF
      echo "🚀 Deploying Milvus via Helm..."
      helm upgrade --install prod /app/charts/milvus \
        --namespace staging \
        -f /tmp/custom-values.yaml \
        --timeout 20m \
        --wait
      echo "✅ Deployment completed."

ttlSecondsAfterFinished: 3600
`

Expected Behavior

No response

Steps To Reproduce

Milvus Log

No response

Anything else?

No response

[github-actions]

The title and description of this issue contains Chinese. Please use English to describe your issue.

[lyc1995452]

我期望能实现类似这样的milvus-logs/
├── datanode/
│ ├── prod-milvus-datanode-xxxx-1/ <-- 真正的 Pod 名字
│ │ └── datanode-0.log
│ └── prod-milvus-datanode-xxxx-2/
│ └── datanode-0.log
├── proxy/
│ ├── prod-milvus-proxy-yyyy-1/
│ │ └── proxy-0.log
...

[yanliang567]

@lyc1995452 please try to export milvus logs with this: please refer this doc to export the whole Milvus logs. It will export logs by different pods

/assign @lyc1995452
/unassign

[lyc1995452]

你这个是导出日志 我是问的日志持久化，不是意思吧 我在云平台也不能用命令进行运行啊

[xiaofan-luan]

now the milvus helm chart don't support subPath.

what we recommend is to print logs into standard print stream.

But feel free to add support to helm