(ooops, I somehow missed this email. sorry!)
Hi Yolanda,
On 10/16/2017 11:06 AM, Yolanda Robla Mota wrote:
Hi
Recently i've been helping some customers in the boot from ISCSI feature. So far
everything was working, but we had a problem when booting the deployment image.
It needed specifically a flag rd.iscsi.ibft=1 rd.iscsi.firmware=1 in the grub
commands. But as the generated deployment image doesn't contain these flags,
ISCSI was not booting properly. For other hardware setups, different flags may
be needed.
Note that we only support BFV in the form of booting from a cinder volume
officially. We haven't looked into iBFV in depth.
The solution was to manually execute a virt-customize on the deployment image to
hardcode these parameters.
I wonder if we can add some feature in Ironic to support it. We have discussed
about kernel parameters several times. But at this time, it affects ISCSI
booting. Not having a way in Ironic to customize these parameters forces to
manual workarounds.
This has been discussed several times, and every time the idea of making it a
generic feature was rejected. There is an option to configure kernel parameters
for PXE boot. However, apparently, you cannot add rd.iscsi.firmware=1 if you
don't use iSCSI, it will fail to boot (Derek told me that, I did not check). If
your deployment only uses iSCSI - you can modify [pxe]pxe_append_params in your
ironic.conf to include it.
So can we reconsider the proposal to add kernel parameters there? It could be a
settable argument (driver_info/kernel_args), and then the IPA could set the
parameters properly on the image. Or any other option is welcome.
What are your thoughts there?
Well, we could probably do that *for IPA only*. Something like
driver_info/deploy_image_append_params. This is less controversial than doing
that for user instances, as we fully control the IPA boot. If you want to work
on it, let's start with a detailed RFE please.
Thanks
--
Yolanda Robla Mota
Principal Software Engineer, RHCE
Red Hat
<https://www.redhat.com>
C/Avellana 213
Urb Portugal
yrobl...@redhat.com <mailto:yrobl...@redhat.com> M: +34605641639
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