On Tue, Feb 20, 2018 at 8:35 PM, Rafael Lopez <[email protected]> wrote: >> There is also work-in-progress for online >> image migration [1] that will allow you to keep using the image while >> it's being migrated to a new destination image. > > > Hi Jason, > > Is there any recommended method/workaround for live rbd migration in > luminous? eg. snapshot/copy or export/import then export/import-diff? > We are looking at options for moving large RBDs (100T) to a new pool with > minimal downtime. > > I was thinking we might be able to configure/hack rbd mirroring to mirror to > a pool on the same cluster but I gather from the OP and your post that this > is not really possible?
No, it's not really possible currently and we have no plans to add such support since it would not be of any long-term value. If you are using RBD with a kernel block device, you could temporarily wrap two mapped RBD volumes (original and new) under a md RAID1 with the original as the primary -- and then do a RAID repair. If using QEMU+librbd, you could use its built-in block live migration feature (I've never played w/ this before and I believe you would need to use the QEMU monitor instead of libvirt to configure). > -- > Rafael Lopez > Research Devops Engineer > Monash University eResearch Centre > > -- Jason _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
