[openstack-dev] [Ironic]Nova resource tracker is not able to identify resources of BM instance when fake_pxe driver used

Jim Rollenhagen jim at jimrollenhagen.com
Tue Mar 29 14:30:53 UTC 2016

On Tue, Mar 29, 2016 at 04:59:09PM +0300, Senthilprabu Shanmugavel wrote:
> Hello,
> I am using Ironic for deploying baremetal to my openstack environment.
> Using Liberty version on Ubuntu 14.04. I followed Ironic documentation  to
> deploy x86 servers using pxe_ipmitool. Now I have a working Ironic setup
> for PXE boot. I also want to add my test board running ARM 64 bit CPU to
> ironic deployment. I would like to try using fake_pxe drivers because my
> board don't support IPMI or anything else for out of band communication. So
> idea was to do deployment without power management, eventually fake_pxe is
> the obvious choice. But I have problem in updating the Ironic node which I
> will explain below.
> I created ironic node using fake_pxe driver. Added all necessary parameters
> using node-update command. Node-show command output is given below for
> reference
> <snip>
> Because of this during nova boot, scheduler failed to boot the BM instance.
> Can anyone help me with what's wrong in my configuration?....

I guess probably someone has never used the fake power driver with
devstack. :)

If a node's power state is None, it will be ignored by Nova:

And the fake power driver doesn't set the power state to on/off itself:

We should probably fix this by changing it to:
    return task.node.power_state or states.POWER_ON

In the meantime, an easy workaround would be:
ironic node-set-power-state <uuid> on
ironic node-set-power-state <uuid> off

Which would have the driver 'remember' the power state is currently off,
allowing Nova to pick up the resources.

Hope that helps :)

// jim

> Thanks in advance,
> Senthil

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