[libvirt] How to connect to the running VM

[Zdenek Styblik]

On 07/29/11 13:36, bala suru wrote:
> Hi,
> I have deployed some VM on to the KVM-qemu and installed libvirtd ..
> 
> I could see the VM running by command virsh list .
> 
> but how to login to the VMs other than SSH ..? i tried virsh vncdisplay ,
> but no output ..
> 
> regards
> bala
> 
> 
> 
> 
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Hello,

if VM is running at localhost eg. your workstation, I do:

% netstat -nlp;

look for '127.0.0.1:590x' as libvirt assigns VNC ports automatically and
in incremental order. (Note: this, however, is not a rule. And you can
assign whatever port you want by hand.)

~~~ SNIP ~~~
tcp        0      0 localhost:5901          *:*
LISTEN      -
~~~ SNIP ~~~

Then I just use VNC client like % vncviewer localhost:5901; to connect
to VM.

Have you tried to hit a key or move the mouse? Console/screen might be
in suspend mode in order to "save" power.

Also, there might be few catches which depend on your setup.
1] are you sure VM has VNC console assigned? Use % virsh; and 'dumpxml
<domain>' command to check out.

~~~ SNIP ~~~
<graphics type='vnc' port='5901' autoport='yes'/>
~~~ SNIP ~~~

2] it might be password protected, TLS might be required etc. etc.

If it's at remote host, I recommend to use SSH to tunnel VNC port. You
can find how-to at internet.
You can also use 'virt-manager' which is included as package in many
distributions. Well, at least in Fedora, Debian and, I believe, Ubuntu.

I hope lines above help you a bit.

Regards,
Zdenek

-- 
Zdenek Styblik
email: stybla at turnovfree.net
jabber: stybla at jabber.turnovfree.net