Re: [openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-14 Thread Chris Jones
Hi My thoughts: Shoe-horning the ephemeral partition into Cinder seems like a lot of pain for almost no gain[1]. The only gain I can think of would be that we could bring a node down, boot it into a special ramdisk that exposes the volume to the network, so cindery operations (e.g. migration)

Re: [openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-14 Thread Clint Byrum
Excerpts from Chris Jones's message of 2014-11-14 00:42:48 -0800: Hi My thoughts: Shoe-horning the ephemeral partition into Cinder seems like a lot of pain for almost no gain[1]. The only gain I can think of would be that we could bring a node down, boot it into a special ramdisk that

Re: [openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-14 Thread Josh Gachnang
For decom (now zapping), I'm building it with config flags to either disable it entirely, or just disable the erase_disks steps. No comment on the daft bit :) But I do understand why you'd want to do it this way. https://review.openstack.org/#/c/102685/ On Fri Nov 14 2014 at 6:14:13 AM Clint

Re: [openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-13 Thread Robert Collins
Back in the day before the ephemeral hack (though that was something folk have said they would like for libvirt too - so its not such a hack per-se) this was (broadly) sketched out. We spoke with the cinder PTL at the time in portland, from memory. There was no spec, so here is my

Re: [openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-13 Thread Duncan Thomas
The problem with considering it a cinder volume rather than a nova ephemeral volume is that it is just as leaky a set of semantics - cinder volumes can be detached, attached elsewhere, snapshotted, backed up, etc - a directly connected bare metal drive will be able to do none of these things.

[openstack-dev] [TripleO] [Ironic] [Cinder] Baremetal volumes -- how to model direct attached storage

2014-11-12 Thread Clint Byrum
Each summit since we created preserve ephemeral mode in Nova, I have some conversations where at least one person's brain breaks for a second. There isn't always alcohol involved before, there almost certainly is always a drink needed after. The very term is vexing, and I think we have done