Volumes (Kubernetes)

Kubernetes Volumes allows to store data independent of Container restarts. Volumes in Kubernetes are different that Docker Volumes.

Kubernetes supports different type of volumes :

• Cloud providers: awsElasticBlockStore, azureDisk, azureFile
• Storage technologies: fc (fibre channel), iscsi
• Networked filesystems: cephfs, nfs, glusterfs
• Others:
  • cinder, configMap, CSI, downwardAPI
  • emptyDir: the data in the emptyDir is deleted forever when Pod is removed from a node.
  • flexVolume, can be expanded
  • flocker, gcePersistentDisk, hostPath, local, persistentVolumeClaim, projected, portworxVolume, quobyte, rbd, scaleIO, secret, storageos, vsphereVolume
  • Support for raw block storage in CSI (v1.18, March 2020)
• Deprecated: gitRepo

Persistent volumes subsystem provides an API for users and administrators that abstracts details of how storage is provided from how it is consumed.

Related terms

• CKA v1.18: Understand persistent volumes and know how to create them
• CKA v1.15: Understand PersistentVolumeClaims for storage

Activities

• Read https://kubernetes.io/docs/concepts/storage/persistent-volumes/

See also

• Persistent Volumes
• Certified Kubernetes Administrator: Understand PersistentVolumeClaims for storage
• Pods

https://kubernetes.io/docs/concepts/storage/volumes/

https://kubernetes.io/docs/concepts/storage/volumes/#types-of-volumes

https://kubernetes.io/docs/concepts/storage/#fc

https://kubernetes.io/docs/concepts/storage/volumes/#flexVolume

https://kubernetes.io/docs/concepts/storage/persistent-volumes/#expanding-persistent-volumes-claims