Kubernetes，VolumeMounts是文件，而不是目录

Question

我将使用K8S来编排Docker容器。在k8s中，我需要将文件从主机目录（/configs/nginx/cas-server.conf）复制到pod容器目录（/etc/nginx/nginx.conf），但是当前的k8s仅允许装入目录，而不允许装入/复制文件。如何解决这个问题呢？

以下是我的nginx-cas-server-deply.yaml文件。

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-cas-server-depl
spec:
  replicas: 1
  template:
    metadata:
      labels:
        app: nginx-cas-server-pod
    spec:
      containers:
      - name: nginx-cas-server-pod
        image: nginx
        imagePullPolicy: Never
        ports:
          - containerPort: 100
        volumeMounts:
        - mountPath: /etc/nginx/nginx.conf
          name: nginx-cas-server-conf
        - mountPath: /app/cas-server/public
          name: nginx-cas-server-public
      volumes:
      - name: nginx-cas-server-conf
        hostPath:
          path: /configs/nginx/cas-server.conf
      - name: nginx-cas-server-public
        hostPath:
          path: /cas-server/public

Answer 1

在您部署的配置，你需要使用mountPath与目录和文件名和subPath字段文件名。同样，重要的是，您需要在节点上完全按照要挂载的/etc/nginx/nginx.conf方式命名文件，因此，如果要挂载到，则文件应命名为nginx.conf

这是示例：

节点上目录的内容：

# ls /config/
nginx.conf  some_dir

Nginx部署的配置文件

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  labels:
    run: nginx
  name: nginx
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      run: nginx
  template:
    metadata:
      labels:
        run: nginx
    spec:
      containers:
      - image: nginx
        name: nginx
        volumeMounts:
        - mountPath: /etc/nginx/nginx.conf 
          name: test
          subPath: nginx.conf
      volumes:
      - hostPath:
          path: /config
        name: test