[openstack-dev] [ironic] Kernel parameters needed to boot from iscsi
Yolanda Robla Mota
yroblamo at redhat.com
Wed Oct 25 12:15:59 UTC 2017
Note that we only support BFV in the form of booting from a cinder volume
> officially. We haven't looked into iBFV in depth.
I have been testing that on the context of booting from SAN. It is at
deploy time, in the context of TripleO, in the undercloud. At that point no
cinder is there. We have been deploying with some ISCSI targets, and ironic
consuming those instead of booting from local hard disk. I guess it is a
> 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.
No PXE boot possible. As it is in the context of TripleO, we use the
boot_option=local. I know that it is possible to customize with pxe boot,
but we cannot rely on it, but have the kernel parameter on local boot.
> 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.
IPA boot works fine. Some time ago I added some patches on the ironic-agent
element, to force the modprobe of several modules (including ibft, fcoe,
etc...) That is because IPA image is not based on dracut, so it doesn't
rely on parsing the cmdline from kernel boot and dracut hooks. The problem
with kernel parameters is only happening now on the deployment image, and
so far, the only working solution i could find, is execute a virt-customize
on the image to add those.
>> Yolanda Robla Mota
>> Principal Software Engineer, RHCE
>> Red Hat
>> C/Avellana 213
>> Urb Portugal
>> yroblamo at redhat.com <mailto:yroblamo at redhat.com> M: +34605641639 <
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Yolanda Robla Mota
Principal Software Engineer, RHCE
yroblamo at redhat.com M: +34605641639
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