kubernetes - volumeMount subPath 不起作用

Question

我正在尝试使用新的 subPath在 this 中实现的功能拉取请求(最近在 v1.3 中发布)。

但是，mount 的输出显示它忽略了 subPath , 为两个卷挂载挂载相同的 NFS 目录:

nfs-server:/mnt/nfs/exports/apps/my-app on /home/share/foo type nfs4 (rw,relatime,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.128.0.4,local_lock=none,addr=nfs-server)
nfs-server:/mnt/nfs/exports/apps/my-app on /home/share/bar/baz type nfs4 (rw,relatime,vers=4.0,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.128.0.4,local_lock=none,addr=nfs-server)

我的部署 YAML 的相关部分:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: app
spec:
  replicas: 1
  template:
    metadata:
      labels:
        name: app
    spec:
      containers:
      - name: app
        image: my-org/my-app:latest
        volumeMounts:
        - mountPath: /home/share/foo
          name: nfs
          subPath: foo-resources
        - mountPath: /home/share/bar/baz
          name: nfs
          subPath: baz-resources
      volumes:
      - name: nfs
        nfs:
          path: /mnt/nfs/exports/apps/my-app
          server: nfs-server

Answer 1

我对此不是 100% 确定，因为我使用的是 configMap卷而不是 NFS，但我必须制作 mountPath匹配 subPath如下所示，它对我有用。

仅供引用，我使用的是 Kubernetes v1.4.5。

如果我正确阅读本文，您会想要:

挂载 NFS 文件或目录 /mnt/nfs/exports/apps/my-app/foo-resources这样它在容器中的路径是 /home/share/foo/foo-resources .

挂载，NFS 文件或目录 /mnt/nfs/exports/apps/my-app/baz-resources这样它在容器中的路径是 /home/share/bar/baz/baz-resources .

尝试这个:

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: app
spec:
  replicas: 1
  template:
    metadata:
      labels:
        name: app
    spec:
      containers:
      - name: app
        image: my-org/my-app:latest
        volumeMounts:
        - mountPath: /home/share/foo/foo-resources
          name: nfs
          subPath: foo-resources
        - mountPath: /home/share/bar/baz/baz-resources
          name: nfs
          subPath: baz-resources
      volumes:
      - name: nfs
        nfs:
          path: /mnt/nfs/exports/apps/my-app
          server: nfs-server

区别:

16c16
<         - mountPath: /home/share/foo/foo-resources
---
>         - mountPath: /home/share/foo
19c19
<         - mountPath: /home/share/bar/baz/baz-resources
---
>         - mountPath: /home/share/bar/baz