[openstack-dev] [Nova][TripleO] Nested resources

Fox, Kevin M kevin.fox at pnnl.gov
Mon Dec 2 20:39:30 UTC 2013


Hi all,

I just want to run a crazy idea up the flag pole. TripleO has the concept of an under and over cloud. In starting to experiment with Docker, I see a pattern start to emerge.

 * As a User, I may want to allocate a BareMetal node so that it is entirely mine. I may want to run multiple VM's on it to reduce my own cost. Now I have to manage the BareMetal nodes myself or nest OpenStack into them.
 * As a User, I may want to allocate a VM. I then want to run multiple Docker containers on it to use it more efficiently. Now I have to manage the VM's myself or nest OpenStack into them.
 * As a User, I may want to allocate a BareMetal node so that it is entirely mine. I then want to run multiple Docker containers on it to use it more efficiently. Now I have to manage the BareMetal nodes myself or nest OpenStack into them.

I think this can then be generalized to:
As a User, I would like to ask for resources of one type (One AZ?), and be able to delegate resources back to Nova so that I can use Nova to subdivide and give me access to my resources as a different type. (As a different AZ?)

I think this could potentially cover some of the TripleO stuff without needing an over/under cloud. For that use case, all the BareMetal nodes could be added to Nova as such, allocated by the "services" tenant as running a nested VM image type resource stack, and then made available to all tenants. Sys admins then could dynamically shift resources from VM providing nodes to BareMetal Nodes and back as needed.

This allows a user to allocate some raw resources as a group, then schedule higher level services to run only in that group, all with the existing api.

Just how crazy an idea is this?

Thanks,
Kevin



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