[libvirt-users] [libvirt] remote connection issue 'virsh -c qemu+ssh:///root at localhost/system list'

[Doug Goldstein]

On Thu, Mar 21, 2013 at 6:23 AM, Yin Olivia-R63875 <r63875 at freescale.com> wrote:
> Hi,
>
> I'm trying remote connection with qemu hypervisor on FSL PPC board.
>
> The libvirt server is the PPC board.
>
> root at ppc:~# ifconfig eth0 10.193.20.109
> root at ppc:~# libvirtd -d
> root at ppc:~# virsh -c qemu:///system define test.xml
> root at ppc:~# virsh -c qemu:///system start test
> root at ppc:~# virsh -c qemu:///system list --all
>  Id    Name                           State
> ----------------------------------------------------
>  2     test                           running
>
> Connect from an X86 PC (Ubuntu 10.04) to the PPC board.
>
> user at x86:~$ virsh -c qemu+ssh://root@10.193.20.109/system list --all
> The authenticity of host '10.193.20.109 (10.193.20.109)' can't be established.
> RSA key fingerprint is 2f:56:07:08:da:7d:ac:41:45:57:d2:12:15:19:67:e0.
> Are you sure you want to continue connecting (yes/no)? yes
> root at 10.193.20.109's password:
> error: failed to connect to the hypervisor
> error: End of file while reading data: Warning: Permanently added '10.193.20.109' (RSA) to the list of known hosts.
> nc: invalid option -- 'U'
> BusyBox v1.19.4 (2013-03-08 13:08:18 CST) multi-call binary.
>
> Usage: nc [-iN] [-wN] [-l] [-p PORT] [-f FILE|IPADDR PORT] [-e PROG]: Input/output error
>
>
>
> I tried to verify the remote connection on localhost. But it also failed as below:
>
> root at mpc8572ds:~# virsh -c qemu+ssh:///root@localhost/system list --all
> root at localhost's password:
> error: failed to connect to the hypervisor
> error: End of file while reading data: nc: invalid option -- 'U'
> BusyBox v1.19.4 (2013-03-08 13:08:18 CST) multi-call binary.
>
> Usage: nc [-iN] [-wN] [-l] [-p PORT] [-f FILE|IPADDR PORT] [-e PROG]: Input/output error
>
>
> Could anyone give suggestion on this issue?
>
>
> Best Regards,
> Olivia
>

You're using busybox's nc (netcat) implementation. It does not support
UNIX sockets which is a requirement of libvirt when using the
qemu+ssh:// scheme to connect.

I'd suggest looking into generating some certificates and using
qemu+tls:// (the default when using qemu:// to a remote system). If
you don't care about any authentication or encryption for testing
purposes you can use qemu+tcp://

-- 
Doug Goldstein