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Re: [libvirt] Remote Xen and libvirt >= 0.5.0 Issues



Hey Daniel,

Thanks for the reply. The strange thing is, libvirt isn't even attempting to establish a connection with the remote server. I've performed tcpdumps to verify this; no traffic is exchanged between the two hosts when executing the virsh command. If I switch back to a version of libvirt below 0.5.0 such as 0.4.6, it works like a charm.

Is there anything else I could try?

Hany

On Mon, Jun 8, 2009 at 7:04 AM, Daniel P. Berrange <berrange redhat com> wrote:
On Sun, Jun 07, 2009 at 02:02:20PM -0400, Hany Fahim wrote:
> Hi,
> I'm currently running a few servers with CentOS 5.3 (i386) with the stock
> Xen version:
>
> # rpm -q kernel-xen xen libvirt
> kernel-xen-2.6.18-92.1.22.el5
> kernel-xen-2.6.18-128.1.6.el5
> xen-3.0.3-80.el5_3.2
> libvirt-0.6.3-1
>
> libvirt was compiled from the src RPM from libvirt.org to run on i386
> architecture without issue. I'm having a problem when trying to connect to
> remote Xen installations using versions of libvirt starting from 0.5.0 and
> above. When issuing virsh commands to query the local instance, it works
> without issue, but any remote sources gives 'error: failed to connect to the
> hypervisor'. Here's what LIBVIRT_DEBUG reveals:
>
> # LIBVIRT_DEBUG=6 virsh -d 5 -c xen://node3/ list
> command: "list "
> 13:53:17.133: debug : do_open:930 : trying driver 0 (Test) ...
> 13:53:17.133: debug : do_open:936 : driver 0 Test returned DECLINED
> 13:53:17.133: debug : do_open:930 : trying driver 1 (Xen) ...
> 13:53:17.133: debug : do_open:936 : driver 1 Xen returned DECLINED
> 13:53:17.133: debug : do_open:930 : trying driver 2 (OPENVZ) ...
> 13:53:17.133: debug : do_open:936 : driver 2 OPENVZ returned DECLINED
> 13:53:17.133: debug : do_open:930 : trying driver 3 (VBOX) ...
> 13:53:17.133: debug : do_open:936 : driver 3 VBOX returned DECLINED
> 13:53:17.133: debug : do_open:930 : trying driver 4 (remote) ...
> 13:53:17.133: debug : do_open:936 : driver 4 remote returned DECLINED
> 13:53:17.133: debug : virUnrefConnect:210 : unref connection 0x93275d0 1
> 13:53:17.134: debug : virReleaseConnect:171 : release connection 0x93275d0
> error: failed to connect to the hypervisor


It looks very much like the remote driver is failing to connect to the remote
libvirtd daemon. Please verify that libvirtd on the remote host was started
with the --listen flag, and that you have configured x509 certificates and
have not disabled the  'listen_tls' config param in /etc/libvirt/libvirtd.conf


Daniel
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