[Openstack] Shared Storage with cinder ?
clint at fewbar.com
Fri Jul 5 16:31:34 UTC 2013
Excerpts from Heiko Krämer's message of 2013-07-05 09:24:03 -0700:
> Heyho guys,
> I'm searching for a solution to share storage over more then one instance.
> Normally you attach a block device with cinder directly via iscsi or
> glusterfs or whatever to one instance and that's it. Multi attachments
> are not present.
> Use case:
> I've an application on 4 application instances and a database instance.
> Now you have static file like images, movies, css ... but this files
> should be available on each application instance.
This use case is best served by object storage like swift and CEPH's radosgw.
> Now you need to fire up an "storage" instance and attach a volume. After
> that you can with nfs or what ever share your stuff to the application
> instances but i think this is a very big ressource overhead for small
> projects. You need a instance only to share your data on each project
> and this n times :(
If you only have one small app with 5 instances, running your own
OpenStack is quite overkill. However, I suspect you have OpenStack so
you can have many small apps with a few instances, and thus you'll find
many of them can benefit from a good solid object store.
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