On 10/18/2017 11:37 AM, Chris Apsey wrote:
All,
I'm working to add baremetal provisioning to an already-existing libvirt (kvm)
deployment. I was under the impression that our currently-existing endpoints
that already run nova-conductor/nova-scheduler/etc. can be modified to support
both kvm and ironic, but after looking at the ironic installation guide
(https://docs.openstack.org/ironic/latest/install/configure-compute.html), this
doesn't appear to be the case. Changes are made in the [default] section that
you obviously wouldn't want to apply to your virtual instances.
Given that information, it would appear that ironic requires that you create an
additional host to run nova-compute separately from your already-existing
compute nodes purely for the purpose of managing the ironic-nova integration,
which makes sense.
I think you could run nova-compute with a config file specified as part of the
commandline. From what I understand if you run it on the same host as the
libvirt nova-compute you'd need to use a separate hostname for running the
ironic nova-compute since nova uses the binary/hostname tuple to uniquely
identify services in the DB.
Chris
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