[openstack-dev] [ironic] Question about pxe_ssh drivers

Waines, Greg Greg.Waines at windriver.com
Tue Nov 21 17:51:16 UTC 2017

Aah that’s an interesting idea, using the wake-on-lan technology to solve the problem of how to power on the server without IPMI.

So how does the solution solve the power-off and reset functions ?

·         is the deployment image (with IPA) deployed on the ironic node as soon as it is enrolled ?
i.e. in order to manage these operations ?
( as well as configure the wake-on-lan hardware ? )


From: Lukas Bezdicka <lbezdick at redhat.com>
Reply-To: "openstack-dev at lists.openstack.org" <openstack-dev at lists.openstack.org>
Date: Tuesday, November 21, 2017 at 11:28 AM
To: "openstack-dev at lists.openstack.org" <openstack-dev at lists.openstack.org>
Cc: "Nasir, Shoaib" <Shoaib.Nasir at windriver.com>
Subject: Re: [openstack-dev] [ironic] Question about pxe_ssh drivers

This is issue I hit recently. There are staging drivers [1] and there is virtualbmc [2] to emulate ipmi for virtual machines. I ended up using pxe_wol_isci driver.

[1] - http://ironic-staging-drivers.readthedocs.io/en/latest/README.html
[2] - https://pypi.python.org/pypi/virtualbmc/1.2.0

On Tue, Nov 21, 2017 at 5:22 PM, Waines, Greg <Greg.Waines at windriver.com<mailto:Greg.Waines at windriver.com>> wrote:

We have been integrating OpenStack Ironic into our own OpenStack Distribution.
Thanks to help from the mailing list, we’ve been able to successfully ‘nova boot’ a bare metal instance on an ironic node using the pxe_ipmitool drivers.
Thanks again for all the help.

A QUESTION about some future work we are starting to look at.

We are interested in using Ironic to boot smaller devices that do NOT support IPMI.

I believe that there are other drivers such as pxe_ssh for managing resets and power on/off of such servers.
But i don’t understand how these work at a high-level.
- where do the pxe_ssh drivers SSH to ?
      >  for reset, i suppose it could be the ironic node itself (if it’s actually running a load, like the deployment image)
      > but for power on/off ... it can’t be the ironic node itself

Can somebody provide or point me to a brief explanation of how Ironic can be used for
serving loads to devices NOT supporting IPMI ?

thanks in advance,

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