Feature Overview (aka. Goal Summary)

Volume Group Snapshots is a key new Kubernetes storage feature that allows multiple PVs to be grouped together and snapshotted at the same time. This enables customers to takes consistent snapshots of applications that span across multiple PVs.

This is also a key requirement for backup and DR solutions.

https://kubernetes.io/blog/2023/05/08/kubernetes-1-27-volume-group-snapshot-alpha/

https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/3476-volume-group-snapshot

Goals (aka. expected user outcomes)

Productise the volume group snapshots feature as GA, have docs updated, testing as well as removing feature gate to enable it by default.

Requirements (aka. Acceptance Criteria):

Tests and CI must pass. We should identify all OCP shipped CSI drivers that support this feature and configure them accordingly.

Use Cases (Optional):

1. As a storage vendor I want my customers to benefit from the VolumeGroupSnapshot feature included in my CSI driver.
2. As a backup/DR software vendor I want  to use the VolumeGroupSnapshot feature.
3. As a customer I want access to use VolumeGroupSnapshot feature in order to take consistent snapshots of my workloads that are relying on multiple PVs or use a backup/DR solution that leverages VolumeGroupSnapshot

Out of Scope

CSI drivers development/support for this feature.

Background

Provide any additional context is needed to frame the feature. Initial completion during Refinement status.

This allows backup vendors to implemented advanced feature by taking snapshots of multiple volumes at the same time a common use case in virtualisation.

Customer Considerations

Drivers must support this feature and enable it. Partners may need to change their operator and/or doc to support it.

Documentation Considerations

We already have TP doc content. Update the OCP driver's table to include this capability. Check if any new driver supports it beyond ODF

Interoperability Considerations

Can be leveraged by ODF and OCP virt, especially around backup and DR scenarios.