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<p><font size="2" face="sans-serif">I am sure it has been discussed, but booting an instance from a volume stored on SAN (similar to EBS) is clearly an important use case for private clouds...</font><br>
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<font size="2" face="sans-serif">Best Regards,<br>
<br>
Salman A. Baset<br>
Research Staff Member, IBM T. J. Watson Research Center<br>
Tel: +1-914-784-6248<br>
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<img width="16" height="16" src="cid:1__=0ABBF358DFE668DA8f9e8a93df938@us.ibm.com" border="0" alt="Inactive hide details for Josh Durgin ---03/22/2012 07:25:23 PM---At the last couple volumes meetings, there was some discussio"><font size="2" color="#424282" face="sans-serif">Josh Durgin ---03/22/2012 07:25:23 PM---At the last couple volumes meetings, there was some discussion of the desired behaviors of nova's bo</font><br>
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<font size="1" color="#5F5F5F" face="sans-serif">From: </font><font size="1" face="sans-serif">Josh Durgin <josh.durgin@dreamhost.com></font><br>
<font size="1" color="#5F5F5F" face="sans-serif">To: </font><font size="1" face="sans-serif">openstack@lists.launchpad.net</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Date: </font><font size="1" face="sans-serif">03/22/2012 07:25 PM</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Subject: </font><font size="1" face="sans-serif">[Openstack] boot from volume use cases</font><br>
<font size="1" color="#5F5F5F" face="sans-serif">Sent by: </font><font size="1" face="sans-serif">openstack-bounces+sabaset=us.ibm.com@lists.launchpad.net</font><br>
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<tt><font size="2">At the last couple volumes meetings, there was some discussion of the<br>
desired behaviors of nova's boot from volume functionality. There were<br>
a few use cases discussed, but there are probably plenty we didn't<br>
think of, so it would be useful to get input from a larger audience.<br>
<br>
What use cases for boot from volume are people interested in, and<br>
which should nova support?<br>
<br>
Here are a few use cases:<br>
<br>
1) I use an existing instance to manually create a bootable volume<br>
containing an OS there is no image for (and I cannot create an<br>
image). I boot the new OS from the volume I created.<br>
<br>
2) I create a bunch of new instances that have no ephemeral disks,<br>
but are all based on the same image. The data from the image is<br>
copied to a new volume for each new instance.<br>
<br>
3) I have an instance that has no ephemeral disks, and stores<br>
everything in a volume. I take periodic snapshots of the<br>
volume. Later, my original instance becomes corrupted, and I want<br>
to restore from the last known good snapshot I took. I boot a new<br>
instance from a new volume created by cloning from the last<br>
good snapshot.<br>
<br>
<br>
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