<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Andale Mono; font-size: 10pt; color: #000000'>Not sure if this is sufficient for you or not, but I currently use the rbd portion of ceph for Openstack. I don't currently do live migrations because it's not feasible for me to setup the extra storage. Instead, I do block migrations, and these work rather well. <br><br>The only bad part is that you have to release the floating ip, migrate the instance, and then reassign it to the vm. Otherwise, the vm's networking gets messed up. I use nova-network in multi-host mode, so I'm not sure if the same behavior would happen with Quantum. <br><br>Sébastian Han wrote a great article on block migration if you're interested. <br><br>http://www.sebastien-han.fr/blog/2012/07/12/openstack-block-migration/<br><br>I noted at the bottom of the article that the block migration functionality won't take affect with currently running instances. You have to terminate, then re-spawn them after you make your changes to nova.conf. <br><br><div><span name="x"></span>Dave Spano<br><br><span name="x"></span><br></div><hr id="zwchr"><div style="color: rgb(0, 0, 0); font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Jonathan Abdiel Gonzalez Valdebenito" <jonathan.abdiel@gmail.com><br><b>To: </b>openstack-operators@lists.openstack.org<br><b>Sent: </b>Tuesday, November 27, 2012 11:38:24 AM<br><b>Subject: </b>[Openstack-operators] Live Migration and instances stores<br><br>Hi all,<div><br></div><div>First at all I'm glad to write to the list :D thanks for reading!</div><div><br></div><div>I'm currently experimenting with lot of ideas to store the instances(/var/lib/nova/instances) and do a live migration with them, well here it's a tiny resume:</div>
<div><br></div><div>DRBD + OCFS2: Works pretty well but as it depends on DRBD which it's a raid 1 system it can't grow any further than the initial size... bad idea if you want some scalability <br clear="all"><div>
<br></div><div>GlusterFS: A bit slow, it can take some minutes to replicate but works, the only problem that it has it's that you can't perform a live migration, the reason, cache != none or that's what the logs says</div>
<div><br></div><div>Ceph: It runs pretty good tests, but it's slow with the machines in my lab, and throw some errors about being too slow. Anyway, I tried the live migration and it didn't work either.</div><div>
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</div><div>Now I'm currently starting my test with MooseFS but don't know yet if it will work, according to the openstack manual it's a good idea, but I will like to have the experience of the list on this matter, does anyone try any of this options or another successfully? or have other options that I haven't found yet?</div>
<div><br></div><div><br></div><div>Thanks in advance for all you answer!</div><div><br></div>-- <br>Greets,<div><br></div><br>
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