Question

A team runs a single-container Pod that caches temporary processing files in a volume defined as 'emptyDir'. During testing, a developer notices that after the Pod is deleted and rescheduled onto another node, all the cached files are gone. They ask you to explain this behavior. What is the correct explanation for why the data did not persist?

Accepted Answer

An emptyDir volume is tied to the Pod's lifecycle and is deleted permanently when the Pod is removed from the node.

Answer

emptyDir volumes are read-only by default, so no data could ever have been written to them.

Answer

emptyDir data is stored in etcd, which purges volume contents on every scheduling event.

Answer

emptyDir volumes automatically replicate across nodes but lose data if the destination node lacks a CSI driver.