On 03/16/2012 11:02 AM, Su Zhang wrote:


On Thu, Mar 15, 2012 at 9:45 PM, Alex Jia <ajia@redhat.com> wrote:
On 03/16/2012 05:33 AM, Su Zhang wrote:


On Thu, Mar 15, 2012 at 4:20 PM, Eric Blake <eblake@redhat.com> wrote:
On 03/15/2012 02:57 PM, Su Zhang wrote:
> Hi all,
>
> I am trying to use virt-install to install domU image. However, I
> encountered the following issue. It seems that a connection driver is
> needed for Xen.
> I am new to both libvirt and Xen. Anyone have any ideas on what's wrong
> with the following error ?
>
>
>
> # virt-install --connect=xen:/// -p -d
> Thu, 15 Mar 2012 10:17:55 DEBUG    Launched with command line:
> /usr/bin/virt-install --connect=xen:/// -p -d
> Thu, 15 Mar 2012 10:17:55 DEBUG    Requesting libvirt URI xen:///
> Thu, 15 Mar 2012 10:17:55 ERROR    no connection driver available for No
> connection for URI xen:///

This probably means that your copy of libvirt.so and libvirtd was built
without xen support.  What does

virsh --version=long

say?  Also, are you sure libvirtd is running?
In addition, I want to know your libvirt.so, libvirtd, xend location, for example,
# which libvirtd
# which xend
# locate libvirt.so

Please also make sure xend service is running:
# service xend status

--
Eric Blake   eblake@redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


Eric,

Here is the output:
# virsh --version=long
Virsh command line tool of libvirt 0.9.10
See web site at http://libvirt.org/

Compiled with support for:
 Hypervisors: Xen QEmu/KVM UML OpenVZ VirtualBox LXC Test
 Networking: Remote Daemon Network Bridging Nwfilter VirtualPort
 Storage: Dir Filesystem SCSI Multipath iSCSI LVM
 Miscellaneous: SELinux Secrets Debug

It seems that it does support Xen.
Yeah, Xen indeed appears in Hypervisors line.


I am not sure if libvirtd is running so I use the following command to start it:

[root@XenTester srv]# /etc/rc.d/init.d/libvirtd start
Right, you may also use service libvirtd start, and check it by service libvirtd status or ps -ef|grep libvirtd.

But the same error is still there.

Am I using the right way to start libvirtd service? Are there any other possible reasons of this error?

Thanks,

--
Su Zhang
Ph.D Candidate
Computing and Information Sciences
Kansas State University

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Alex,

Here is some information:

# /etc/init.d/xencommons start
Starting xenstored...
Setting domain 0 name...
Starting xenconsoled...
[root@XenTester su]# /etc/init.d/xend start
[root@XenTester su]# which libvirtd
/usr/local/sbin/libvirtd
[root@XenTester su]# which xend
/usr/sbin/xend
[root@XenTester su]# locate libvirt.so
/usr/lib64/libvirt.so.0
/usr/lib64/libvirt.so.0.9.4
/usr/local/lib/libvirt.so
/usr/local/lib/libvirt.so.0
/usr/local/lib/libvirt.so.0.9.10
You have 2 different libvirt versions 0.9.4 and 0.9.10, and your 0.9.10 is put under the
/usr/local/lib directory, so I guess you haven't used ./configure with --prefix=/usr option
or directly use ./autogen.sh --system when you configure and compile libvirt.

And also please yum install strace -y if you haven't installed strace rpm, then run the following operation:

# strace -o strace.txt virt-install --connect=xen:/// -p

Then attach strace.txt as a attachment.

Thanks,
Alex
[root@XenTester su]# service xend status
[root@XenTester su]# ps -ef|grep libvirtd
root      2242     1  0 21:52 ?        00:00:00 libvirtd --daemon
root      3295  3112  0 21:59 pts/0    00:00:00 grep libvirtd

Can you see if it is normal here?

Thanks,


--
Su Zhang
Ph.D Candidate
Computing and Information Sciences
Kansas State University