On Fri, Sep 12, 2014 at 01:43:18PM +0100, Stefan Hajnoczi wrote:
> On Thu, Sep 11, 2014 at 01:48:51PM +0200, Oliver Rath wrote:
> > after hours for searching in google-world, i didnt find any appropriate
> > for this problem:
> >
> > I want to boot a live-cd (i.e. ubuntu 14.04.1-desktop) in qemu, which
> > starts with an graphical interface, done i.e. by
> >
> > qemu-system-x86_64 -m 3G -smp 2 -drive
> > file=ubuntu-14.04.1-desktop-i386.iso,media=cdrom,if=virtio --enable-kvm
> >
> > Now i want to access to the console of the ubuntu-livecd. At the moment
> > i can do this over changing to text mode via
> >
> > sendkey ctrl-alt-f1
> >
> > in qemu-console (Alt-2), then switching back to qemu-window (alt-1). Now
> > i have access to tty1 of my livecd.
> >
> > But IMHO there should be a more simple way to access to such a console
> > with qemu, i.e. through a pipe, a serial console etc., but i didnt found
> > anything working. The best i got was with -chardev pty,id=myid, which
> > resulted in a "char device redirected to /dev/pts/0 (label myid)". But
> > with a "screen /dev/pts/0" i wasnt able to see any input or output.
> >
> > ssh is unfortunatly not available at this time on the livecd (so i could
> > connect i.e. via -net user,hostfwd:tcp:10022-:22)
> >
> > Any hints to connect directly to a console in an emulated linux?
>
> I use the serial console:
>
> $ qemu-system-x86_64 -serial stdio ...
>
> Make sure the guest has console=ttyS0 on the kernel command-line.
Just to add a little more to what Stefan wrote, here's a working CLI
(not be the most optimal) I use w/ serial console:
$ /usr/bin/qemu-system-x86_64 -m 2048 \
-nographic -nodefconfig -nodefaults \
-machine accel=kvm -m 2048 \
-drive file=./snap1-f20vm.qcow2,if=ide,format=qcow2 \
-serial stdio
And, a little more info here[1]
[1] http://rwmj.wordpress.com/2011/07/08/setting-up-a-serial-console-in-qemu-and-libvirt/
--
/kashyap
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