Re: question regarding early ssh with kvm

[Oliver Zemann <oliver.zemann@gmail.com>]

Hi Stefan

Thanks for your help.
I am able now to print some messages like lsmod, ip addr show etc.
I loaded virtio_net and virtio_pci, there are also a few more, but eth0 
is still unknown to the system.
Do i need any other module?

Regards,
Oli

Am 18.09.2013 10:14, schrieb Stefan Hajnoczi:
> On Tue, Sep 17, 2013 at 09:27:24PM +0200, Oliver Zemann wrote:
>> I would like to run my centos with an encrypted hard drive without
>> entering the password with vnc (as the connection is not encrypted).
>> For that i followed the guide on http://roosbertl.blogspot.ch/2012/12/centos6-disk-encryption-with-remote.html
>>
>> When i follow the tutorial in VirtualBox, i at least can see that i
>> create a connection to the machine.
>> But on my productive server which runs in KVM, i even cant ping the machine.
>>
>> Is there some way to print out debug messages (like "ip addr show")
>> before the mount command has been executed? Maybe some kvm console
>> driver where i can pipe messages to...?
>> Also, is virtio_net and virtio_pci enough to load?
>>
>> I try to get that working for more than 10 days now, this is really
>> driving me crazy.
> In a situation like this a serial console can be helpful.  Set the
> kernel command-line to use the serial port (console=ttyS0) and make sure
> the VM is configured with a serial port device.
>
> This will allow you to follow the boot process.  If you need an
> interactive prompt, check the distro initramfs scripts and set the
> relevant debug options to get a shell prompt during the boot.
>
> Stefan