Spec

Volume Spec

One of the may types of storage available is an emptyDir. The kubelet will create the directory in the container but not mount any storage. Any data created is written to the shared container space so it will not be persistent. When the Pod is deleted, the directory is deleted along with the container.

Creating a Pod with the following specification would create a container with a volume named scratch-volume with a directory /scratch inside the container.

apiVersion: v1
kind: Pod
metadata:
  name: fordpinto
  namespace: default
spec:
  containers:
  - image: simpleapp
    name: gastank
    command:
      - sleep
      - "3600"
    volumeMounts:
    - mountPath: /scratch
      name: scratch-volume
    volumes:
    - name: scratch-volume
      emptyDir: {}

Shared Volume Example

The following specification creates a Pod with 2 containers that share access to a volume:

...
containers:
- name: alphacont
  image: busybox
  volumeMounts:
  - mountPath: /alphadir
    name: sharevol
- name: betacont
  image: busybox
  volumeMounts:
  - mountPath: /betadir
    name: sharevol
volumes:
  - name: sharevol
    emptyDir: {}