Volumes
Volumes:
Kuberenetes supports many types of volumes
A pod can use any number of volume types simultaneously
Types of Volumes:
Persistent Volumes:
Attaching an external storage to a pod
Data will persist after pod termination
Ephemeral Volumes:
Only exists as long as pod exists
Intended for temporary storage
Projected Volumes:
Maps several existing volumes sources into the same directory
Volume Snapshot:
Achiving a volume configurations and its data for rollbacks or backup
Persistent Volume:
A piece of storage in the cluster that has been provisioned by admin
PV is similar to node, as in cluster resource
PV does not reside within a node or a pod
PVs are volume plugins like volumens but have a lifecycle independent of any individual pod that uses the PV.
Mounting pod directly to a stroage is not allowed
Storage class:
Storage class contains:
Provisioner
Parameters
reclaimPolicy
Persistent Volume Claim:
A PVC asked for a type of storage, and if a PV that meets the criteria is matched, the PV is claimed and bound.
ConfigMaps:
A ConfigMap is api object used to store Non confidential data in key-value pairs for pods
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