On Wed, Apr 01, 2009 at 10:13:53PM -0700, Sukadev Bhattiprolu wrote:

I run qemu (version 0.9.1 kvm-84) with -serial option as follows:

- serial telnet::2445,server

so I can telnet to 2445 and have a serial console.

I tried specifying this to libvirt (version 0.6.0) using the following stanza:

<serial type='tcp'> <source mode="bind" host="127.0.0.1" service="2445"/> <protocol type="telnet"/> <target port="1"/> </serial>

I checked /var/log/libvirt/qemu/<guest>.log and found that libvirt added 'nowait' to the serial option:

-serial telnet:127.0.0.1:2445,server,nowait

which is fine (I think).

But when I start my guest, and "telnet 127.0.0.1 2445" I don't get any output even though the guest boots up fine. After the guest boots

$ echo foo > /dev/ttyS0

in the guest shows the 'foo' in the telnet window. But I don't get the boot/shutdown messages.

I also have the vnc option in the xml,

<graphics type='vnc' port='5902' autoport='no' listen='127.0.0.1'/>

so if I open vncviewer, I can see the boot messages. The problem with this though is if the kernel fails to boot for some reason, the vncviewer exits and I can't find the reason the boot failed.

My kernel boot command line has 'console=ttyS0' option. Is there anything else I need to ensure 'telnet 127.0.0.1 port' displays the messages ?

That setting should be what's required to make serial console work. Are you sure you've got it set in the correct place of grub.conf for the guest OS ? I have my guests configured using: "console=ttyS0 console=tty" whch makes messages go to the serial port and graphical console Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://ovirt.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|