Re: serial console with virt-install

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On 02/08/2012 03:52 AM, Felix Blanke wrote:
> On 2/8/12 9:46 AM, Osier Yang wrote:
>> On 2012幎02æ??08æ?¥ 05:08, Felix Blanke wrote:
>>> Hello,
>>> sorry for bother you again. I'm new to kvm and libvirt, that's why my
>>> next question is maybe some sort of noob question :)
>>> I have a headless server (no X at all, just ssh) and want to run some
>>> virtual machines on it. I have kvm etc. all set up.
>>> When doing something like
>>> virt-install --connect qemu:///system -n template -r 1024 --disk
>>> path=/data/vm/template.qcow2,format=qcow2 -c
>>> /data/vm/livedvd-amd64-multilib-2012.iso --os-type linux -v
>>> --network=bridge:br0 --virt-type kvm --arch x86_64 --graphics none
>>> the vm starts
>>> Starting install...
>>> Creating domain...
>>> Connected to domain template
>>> Escape character is ^]
>>> That's it, no more output. I see two threads running, each takes up 100%
>>> cpu.
>>> I tried to help myself via google and read a lot hints like "you need to
>>> setup your guest to get a serial console...", but that's not possible
>>> when running a fresh vm. All I want to do is getting some sort of
>>> console from the vm to start the installation with the given .iso file.
>>> Could someone lead me into the right direct? A link to an explanation
>>> would be more then enough :)
>> Try "--extra-args" to see if it works for you. e.g.
>> --extra-args="console=ttyS0,115200"
> This doesn't work:
> <snip>
> ERROR    --extra-args only work if specified with --location.
> </snip>
> But I don't know what to tell for --location for a gentoo, because you compile
> your own kernel, etc.

If you are booting from CD, the only way to get serial output is to either
connect graphically and specify custom kernel args if the ISO has a splash
screen, or edit the files on the ISO to manually change the boot args.

- Cole

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