Exactly, I have seen that. However, that also means that it is not a "process" then, right? Am I missing something? If we need a live process, where the clients cannot unmpa the volumes, what do you guys recommend? On Wed, Apr 12, 2023 at 10:01 AM Eugen Block <eblock@xxxxxx> wrote: > Hi, > > the docs you mentioned also state: > > > All clients using the source image must be stopped prior to > > preparing a live-migration. The prepare step will fail if it finds > > any running clients with the image open in read/write mode. Once the > > prepare step is complete, the clients can be restarted using the new > > target image name. Attempting to restart the clients using the > > source image name will result in failure. > > So I don't think you can live-migrate without interruption, at least > not at the moment. > > Regards, > Eugen > > Zitat von Work Ceph <work.ceph.user.mailing@xxxxxxxxx>: > > > Hello guys, > > > > We have been reading the docs, and trying to reproduce that process in > our > > Ceph cluster. However, we always receive the following message: > > > > > > ``` > > > > librbd::Migration: prepare: image has watchers - not migrating > > > > rbd: preparing migration failed: (16) Device or resource busy > > > > ``` > > > > > > We tested with both RDB blocks mounted with kRBD, and with librbd via > > KVM/qEMU system. Both cases result in the same result. For KRBD, we > > understood that it is not supported right now, but for librbd it seems > that > > it should be supported somehow. > > > > > > How do you guys handle those situations? > > > > > > We have the following use cases that might need an image to migrate > between > > pools while the client is still consuming it. > > > > - RBD images that are consumed via the iSCSI gateways > > - RBD images mounted (rbd map) in hosts > > - RBD images used by KVM/Libvirt > > > > > > Does Ceph support a live migration of images between pools while the > > clients/consumers are still using those volumes? > > > > > > > > > > [1] https://docs.ceph.com/en/quincy/rbd/rbd-live-migration/ > > _______________________________________________ > > ceph-users mailing list -- ceph-users@xxxxxxx > > To unsubscribe send an email to ceph-users-leave@xxxxxxx > > > _______________________________________________ > ceph-users mailing list -- ceph-users@xxxxxxx > To unsubscribe send an email to ceph-users-leave@xxxxxxx > _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
 |