I have a Deployment that runs one container with a root user. It's perfectly clear that everything my application saves under /data will be ephemeral if I don't have any type of persistent volume and volumeMounts defined.
My question is what would be the purpose of specifying an emptyDir Volume and mounting it to /data? If I don't use fancy features for emptyDir like medium or sizeLimit isn't it the same as using no volumes at all?
Best Answer
One of the main features of the emptyDir is that it can be mounted on multiple containers inside the same Pod.If you don't use this feature I guess there is not much to gain from it. If I remember correctly emptyDirs are preserved when the container inside the pod are restarted but not when the pod is re-scheduled.