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If you are using Ceph as a Cinder backend, you would likely want to run cinder-volume on your controller node(s). You could run it anywhere I suppose, including on the Ceph nodes themselves, but I’d recommend having it on the controllers. Wherever you run
it, you’d need a properly configured ceph.conf, and if you are using cephx authentication, you’d need the keyring files. Your compute nodes would need that conf and keys also.
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<div class="">You can also run Ceph for nova ephemeral disks without Cinder at all. You’d do that in nova.conf.</div>
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<div class="">We use both at Overstock. Ceph for nova ephemeral for general use, and also Ceph as one option in a multi-backend Cinder configuration. We also use it for a Glance store, which is a fantastic option because it makes disk provisioning for Nova
instant, since you’re essentially snapshotting and image RBD into an RBD for Nova/Cinder.</div>
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Mike Smith<br class="">
Lead Cloud Systems Architect</div>
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<a href="http://Overstock.com" class="">Overstock.com</a><br class="">
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<div class="">On Mar 7, 2016, at 10:04 PM, Martin Wilderoth <<a href="mailto:martin.wilderoth@linserv.se" class="">martin.wilderoth@linserv.se</a>> wrote:</div>
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<div style="" class="">Hello</div>
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<div style="" class="">Where should I run cinder-volume when i user ceph</div>
<div style="" class="">on the controller ?<br class="">
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<div style="" class="">on the ceph mon or mds ?</div>
<div style="" class="">or ?<br class="">
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<div style="" class="">Maybe it dosn't matter ?</div>
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<div style="" class="">Thanks in advance</div>
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<div style="" class="">Regards Martin</div>
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