[PKG-Openstack-devel] openstack debian image improvements

[Gaudenz Steinlin]

Thomas Goirand <thomas at goirand.fr> writes:

> On 05/20/2015 09:46 AM, Gaudenz Steinlin wrote:
>> It's the nature of future failures that we don't know what they are and
>> how we would debug them. So IMO it's best to have as much debug output
>> as possible available at a place that's not obstrusive.
>
> It's my opinion that kernel debug output is very verbose and not giving 
> any clues of the type of failures we may have. If we can redirect that 
> to ttyS0 or something, then why not, but I don't believe it's convenient 
> on tty0

I was always talking about ttyS0, not tty0. That's where the nova
console-log output comes from. I agree that it's not very helpful on
tty0 and don't care if the output is there or not.

>
>>> Upgrading to the latest
>>> kernel image will also work with syslinux, AFAIK. (If not, let me know,
>>> and then it must be easy to fix.)
>>
>> It works if you rely on the /vmlinuz and /initrd.img symlink pointing to
>> the right place. This is one part of my patch.
>
> Great then! Let's use that.
>
>> But then still there will
>> be no menu entry for the previous image and for rescue boot and so on.
>
> I wonder how fast you must clicking on horizon to be able to reach the 
> menu before the timeout. This doesn't seem a realistic way to handle 
> things in the cloud use case.

With the default timeout of grub this works just fine if you first
connect to the console and then reboot/reset the instance.

Gaudenz