Volumes Intro

Container disks are ephemeral

Files written only inside a container disappear when the pod is replaced. Volumes provide shared or persistent storage.

emptyDir for scratch space

An emptyDir volume lasts for the life of the pod—useful for caches shared by containers in that pod.

PersistentVolumeClaims (idea)

Apps request storage with a PVC; the cluster binds storage according to its provisioners. Local tools may use a default StorageClass.

kubectl get storageclass
kubectl get pvc -A

Keep expectations local

On Minikube/kind you can practice mounting volumes. Production storage classes and backups are a separate ops topic.