Back up non-cloud persistent volumes

[kstewart]

It would be awesome if we could back up any type of volume, not just aws ebs, gce pd, and azure managed disks. Something like https://github.com/appscode/stash might be interesting to leverage or partner

[ncdc]

Question from @akgunjal in #377 (comment):

Ideally we would want to take backup of our data from the containers onto the object storage. ... But does this feature also allow to restore the data from object storage back inside the container to the directory of user's choice?

@skriss any comments?

[skriss]

@akgunjal the current thinking is that you'd be able to back up the contents of any volume mounted into the container, and restore it to the same mountPath.

Are you asking specifically about being able to restore into a different directory? Would love to hear more about that use case if so, to see if it makes sense to include in the design.

[akgunjal]

@skriss : The use-case is we take backup of any directory from inside the container onto object storage. Then restore this onto any other container in any path. This can be some other mount path or even local directory in the container. Basically its copy of data from backup location on the directory chosen by user.

[ncdc]

@akgunjal would you likely take a backup now, and then after several days/months pass, potentially do a restore? Or is this more like an immediate copy?

[sandaymin123]

@ncdc Please see products like http://duplicity.nongnu.org/ that allow any set of files or directories to be backed up to object storage. Ideally, it would be nice to have this flexiblity including encrypted backups that are either full and incremental

[ncdc]

@sandaymin123 thanks, we're planning on using something similar - restic. This will allow you to back up any directories to whatever restic supports (which is mostly object storage).

[akgunjal]

@ncdc : The restore may be done after several days/months and may not be immediate restore after taking backup.