Exclude pv from backup

[alexsteeel]

Describe the problem/challenge you have

I can't exclude pv from backup.
Label velero.io/exclude-from-backup=true on PV does not working (Resource filtering).
Similar issue with detailed description is velero still backup a pv with exclude label #5507.

Describe the solution you'd like

Add the ability to exclude pod volume from backup using an annotation backup.velero.io/backup-volumes-excludes= like in restic Using the opt-out approach

[KlavsKlavsen]

It seems this is a bug. if we trigger same backup - from cli (instead of schedule triggering it) - then it does indeed use the label - and excludes those PVs - vmware-tanzu/velero#5507 (comment)

[FredNass]

I think it's a documentation bug.

The Backup reference documentation should state that the label will only exclude the K8s Kind from being backed (data still being backed up) and that one should use annotations to exclude PVs data from being backed up.