Re: Snapshot/Cloned workspace with changed file/directory ownership for all files in clone

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Fri, May 01, 2020 at 05:40:45PM +0000, Saravanan Shanmugham (sarvi) wrote:
> One use case for "cloned" workspaces or "seeded" workspaces, is "prebuilt workspaces" for very large builds.
> 
> What would it take to add this capability to the xfs roadmap? This would be very usefull.
> 
> Our use case is as following
>    1. Our fully built software build workspaces can be 800GB+
>    2. We have a nightly build that builds the whole workspace 800GB, done by a generic user "buildusr"
>    3. We then snapshot that workspace with xfs snapshotting capability.

What xfs snapshotting 'capability' is that?

Or, since you've already asked this on the btrfs list, chown -R the
directory tree after you receive the fs image from the build system.

(Maybe the answer you want is shiftfs...)

--D

>    3. We want the developer, "sarvi", to be able to clone from that snapshot and be able to incremental software build and development in the cloned workspace or the seeded filesystem/workspace.
> 
> Problem: 
> All the content, files, directories in the cloned workspace are still owned by "buildusr" and not "sarvi", which causes my builds to fail with permission problems.
> Is there anything in xfs that can help. 
> For that matter any of the open source filesystems support seeding or snapshot/cloning that you might be aware of.
> 
> So far the only filesystem that seems have the capability map/change the file ownership as part of the clone operation is Netapp. 
> And unfortunately that isn’t open source and wont serve our purpose.
> 
>  
> Thanks,
> Sarvi
> Occam’s Razor Rules
>