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Re: [libvirt] How to connect to console of domain on PowerPC?



On Tue, Feb 05, 2013 at 03:05:58AM +0000, Yin Olivia-R63875 wrote:
> Hi Daniel,
> 
> Thanks for your comments.
> So far there's no device in QEMU to align with chardev on FSL PowerPC platforms like spapr-pty for IBM PSeries.
> Maybe it needs patches to QEMU. I'll take deeper investigation on it.

That's really a QEMU issue then - every chardev needs to have a
corresponding -device to associtte with.

> But can't get any output when connecting domain with a simple private root filesystem.
> # vi vm2.xml
> <domain type='lxc'>
>   <name>vm2</name>
>   <memory>25536</memory>
>   <os>
>     <type>exe</type>
>     <init>/sbin/init</init>
>   </os>
>   <vcpu>1</vcpu>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>destroy</on_crash>
>   <devices>
>     <emulator>/usr/libexec/libvirt_lxc</emulator>
>     <filesystem type='mount'>
>       <source dir='/media/ram/vm1-root'/>
>       <target dir='/var/lib/libvirt/lxc/rootfs'/>
>     </filesystem>
>     <interface type='network'>
>       <source network='default'/>
>     </interface>
>     <console type='pty' />
>   </devices>
> </domain>
> 
> # virsh -c lxc:/// define vm2.xml
> # virsh -c lxc:/// start vm2
> Domain vm2 started
> 
> # virsh -c lxc:/// console vm2
> Connected to domain vm2
> Escape character is ^]
> 
> 
> Do you have any suggestion? 

Most likely is that the OS you are running has not decided to run
any login process on the console

'/sbin/init' itself does not directly provide any console interaction
It needs to be configured to run a mingetty process or similar

Daniel
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