Why do we need volumes in K8s

1. If two containers in same pod want to share data. These are ephimeral volume ( emptyDir )
2. Persistent Volumes : All cloud providers provide u block storage. These can be externally provisioned through K8s.
3. When pod needs extra space during execution.

Ephemeral Volumes

• EmptyDir : Type of ephemeral volume that lets container share the file system.

Persistent Volume ( PV ) and Persistent Volume Claim ( PVC )

• Anytime someone needs an external space they can claim for that space.
• Every PVC has an attached PV. PVC lets u find best PV as per requirement
• PVCs can be automatically generated as well as manually provisioned.

Ephemeral Volumes

Persistent Volumes

• can be used in case of self hosted db
• Pods can ask for storage through a PVC on a persistent volume.

Static Persistent Volumes

Automatic Persistent Volumes