Ciao Burkhard,
Burkhard Linke via ceph-users <[email protected]> writes: > Hi, > > > we used the rbd live migration in the past to split up a cluster. The > processed pools were used for image and volumes in our openstack > cloud. Similar here, just using opennebula. > Live migration mostly works, but if the RBD image is in use, you have > to add some extra effort. Cinder for examples stores the mon > information in its database, and this has to be updated. Similar, plus with opennebula it's embedded in the libvirt XML and not so easy to modify. > I used a > script to migrate a RBD image, pause the instance, adjust the database > entries, and live migrate the instance itself to another host to > update the qemu/libvirt information. If the image is not actively used > migration is trivial; if the image is attached to a stopped virtual > machine migration is also trivial, but database entries have to be > updated. Got it. > The rather old nautilus clusters might be problem, so if you want to > try rbd live migration you need to test this first. Will take that into consideration. The rbd mirror might actually also work for us, because a short downtime can likely be tolerated. > Not sure whether the script still exists, but I can try to dig it out > if necessary. If you still have it, would certainly be interested to take a glimpse at it, at least for inspiration. Sunny greetings from Switzerland, Nico -- Sustainable and modern Infrastructures by ungleich.ch _______________________________________________ ceph-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
