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Is it possible to have multiple hypervisors for each nova-compute node in the cluster

asked 2018-04-25 11:24:18 -0500

Ventsi gravatar image

Hi OpenStack community. My first post here!

I've been doing some work on an OpenStack private cloud. More specifically I've used MAAS+Juju to provision servers with Ubuntu 16.04 and deploy the OpenStack framework on a small scale. I have two controller nodes and two compute nodes connected to a dedicated shared storage, managed by Ceph. My compute nodes are configured to use the KVM hypervisor.

The micro-cloud is working perfectly fine so far, but at this point I find myself in need to have another hypervisor - namely LXD, so I can spin-up system containers as well as complete VMs.

The question is...is it possible to co-locate KVM + LXD hypervisor environments on my two compute hosts? The idea is for VMs and containers to run side-by-side.

Disclaimer: I know LXD is not a real hypervisor, but it acts in a similar way :). I'm not looking for a complete guide, just wanna know if its possible :D.

Best regards! Ventsislav

EDIT: I'm aware that host-aggregation and dedicated hosts for each hypervisor environment solves the problem with multiple hypervisors in the cluster. At this point, however, I don't have the means to provision more physical servers, and I really wish to have two of each hypervisor mentioned running in the cluster.

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answered 2018-04-29 16:46:00 -0500

updated 2018-04-29 20:25:15 -0500

Each compute node has a single hypervisor, configured with the compute_driver variable in nova.conf.

The only option I see is running a VM (better perhaps, a container) on one of your servers and using that as a compute node. Figuring out if and how that plays with MAAS is left as an execise to the reader.

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Thanks for the reply. Will give it a try :)

Ventsi gravatar imageVentsi ( 2018-04-30 03:35:10 -0500 )edit

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Asked: 2018-04-25 09:32:04 -0500

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Last updated: Apr 29 '18