A PersistentVolumeClaim (PVC) is a request for storage by a user. It is similar to a Pod. Pods consume node resources and PVCs consume PV resources. Pods can request specific levels of resources (CPU and Memory).
Just so, can two pods use same PVC?
Once a PV is bound to a PVC, that PV is essentially tied to the PVC’s project and cannot be bound to by another PVC. There is a one-to-one mapping of PVs and PVCs. However, multiple pods in the same project can use the same PVC.
Similarly one may ask, does deleting PVC delete PV?
When a persistent volume claim (PVC) is deleted, the persistent volume (PV) still exists and is considered “released”. However, the PV is not yet available for another claim because the data of the previous claimant remains on the volume.
How do you bind PVC and PV?
To bind a PVC to a specific PV as a cluster administrator:
- Use pvc. spec. volumeName if you know the PV name.
- Use pvc. spec. selector if you know the PV labels. By specifying a selector, the PVC requires the PV to have specific labels.
How do you remove PVC and PV?
Static Volume Provisioning – You have to manually configure the PV, PVC but when you need to delete both PV, PVC then you must start from PVC and then go for PV. Dynamic Volume Provisioning – You have to set up Storage Class along with PVC and Storage Class will take of dynamic provisioning of PV(Persistent Volume).
What is persistent storage example?
Persistent storage is any data storage device that retains data after power to that device is shut off. It is also sometimes referred to as non-volatile storage. Magnetic media, such as hard disk drives and tape are common types of persistent storage, as are the various forms of Optical media such as DVD.
What is persistent volumes and why we use it?
Kubernetes persistent volumes provide persistent storage for your containerized applications: even after restarting, the application pod will still have access to the previously stored data. One of the most important functionalities of persistent volume is providing storage beyond the lifecycle of a pod.
What is PVC in Devops?
Persistent Volume Claims (PVC)
PVC is binding between a Pod and PV. Pod request the Volume through the PVC. PVC is the request to provision persistent storage with a specific type and configuration. PVC is similar to a Pod. Pods consume node resources and PVC consume PV resources.
What is the difference between persistent volume and persistent volume claim?
PVCs are requests for those resources and also act as claim checks to the resource. So a persistent volume (PV) is the “physical” volume on the host machine that stores your persistent data. A persistent volume claim (PVC) is a request for the platform to create a PV for you, and you attach PVs to your pods via a PVC.
What is the purpose of a persistent volume claim PVC )?
Developers can use persistent volume claims (PVCs) to request PV resources without having specific knowledge of the underlying storage infrastructure. PVCs are specific to a project and are created and used by developers as a means to use a PV.
Why do we use persistent volume?
It is a resource in the cluster, just as a node is a cluster resource. A persistent volume is a volume plug-in that has a lifecycle independent of any individual pod that uses the persistent volume. This API object captures details of implementation if the storage like NFS or a cloud-provider-specific storage system.