Re: [libvirt] [virt-tools-list] Provision through virt-manager not supported on para-virtualized Xen?

On 02/02/2012 09:07 AM, Cheer Xiao wrote:

2012/2/2 Cole Robinson <crobinso@redhat.com>:

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On 02/02/2012 08:54 AM, Cheer Xiao wrote:

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2012/2/2 Cole Robinson <crobinso@redhat.com>:

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On 02/02/2012 08:05 AM, Cheer Xiao wrote:

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Hi all,

I was setting up libvirt and virt-manager for managing Xen VMs. But when I hit "New" in virt-manager to provision a new VM, virt-manager gives me the error: "No install options available for this connection."

The hypervisor being used is para-virtualized Xen, running on Debian Squeeze.

lux-002# xm info host   Â  Â  Â  Â  Â  Â  Â  Â  : lux-002 release   Â  Â  Â  Â  Â  Â  Â : 2.6.32-5-xen-686 version   Â  Â  Â  Â  Â  Â  Â : #1 SMP Mon Jan 16 19:46:09 UTC 2012 machine   Â  Â  Â  Â  Â  Â  Â : i686 nr_cpus   Â  Â  Â  Â  Â  Â  Â : 4 nr_nodes   Â  Â  Â  Â  Â  Â  : 1 cores_per_socket   Â  Â  : 1 threads_per_core   Â  Â  : 2 cpu_mhz   Â  Â  Â  Â  Â  Â  Â : 3200 hw_caps   Â  Â  Â  Â  Â  Â  Â : bfebfbff:20100000:00000000:00000180:0000641d:00000000:00000001:00000000 virt_caps   Â  Â  Â  Â  Â  Â : total_memory   Â  Â  Â  Â  : 8191 free_memory   Â  Â  Â  Â  Â : 1150 node_to_cpu   Â  Â  Â  Â  Â : node0:0-3 node_to_memory   Â  Â  Â  : node0:1150 node_to_dma32_mem   Â  Â : node0:578 max_node_id   Â  Â  Â  Â  Â : 0 xen_major   Â  Â  Â  Â  Â  Â : 4 xen_minor   Â  Â  Â  Â  Â  Â : 0 xen_extra   Â  Â  Â  Â  Â  Â : .1 xen_caps   Â  Â  Â  Â  Â  Â  : xen-3.0-x86_32p xen_scheduler   Â  Â  Â  Â : credit xen_pagesize   Â  Â  Â  Â  : 4096 platform_params   Â  Â  Â : virt_start=0xf5800000 xen_changeset   Â  Â  Â  Â : unavailable xen_commandline   Â  Â  Â : placeholder com1=9600,8n1 console=com1,vga cc_compiler   Â  Â  Â  Â  Â : gcc version 4.4.5 (Debian 4.4.5-8) cc_compile_by   Â  Â  Â  Â : waldi cc_compile_domain   Â  Â : debian.org cc_compile_date   Â  Â  Â : Mon Nov  7 09:18:26 CET 2011 xend_config_format   Â  : 4 lux-002# libvirtd --version libvirtd (libvirt) 0.8.3

libvirt pokes into the host machine to try and figure out it's virt capabilities. So something must be going wrong there. Here's the function it uses in libvirt code:

http://libvirt.org/git/?p=libvirt.git;a=blob;f=src/xen/xen_hypervisor.c;h=b5...

Something must be funky or unexpected with /sys/hypervisor/properties/capabilities

This is how it looks:

lux-002% cat /sys/hypervisor/properties/capabilities xen-3.0-x86_32p

So, is provision through on para-virtualized Xen *supposed* to be supported or not?

Uh... So I guess it's supposed to be supported

Yes, sorry, libvirt and virt-manager/virt-install do support this config.

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That is saying your host supports 32bit paravirt guests only.

What's the output of 'virsh --connect xen:/// capabilities' ?

blackie% virsh -c xen+ssh://lux-002 capabilities <capabilities>

<host> <cpu> <arch>i686</arch> <features> <pae/> </features> </cpu> <migration_features> <live/> <uri_transports> <uri_transport>xenmigr</uri_transport> </uri_transports> </migration_features> <topology> <cells num='1'> <cell id='0'> <cpus num='4'> <cpu id='0'/> <cpu id='1'/> <cpu id='2'/> <cpu id='3'/> </cpus> </cell> </cells> </topology> </host>

<guest> <os_type>xen</os_type> <arch name='i686'> <wordsize>32</wordsize> <emulator>/usr/lib/xen/bin/qemu-dm</emulator> <machine>xenpv</machine> <domain type='xen'> </domain> </arch> <features> <pae/> </features> </guest>

</capabilities>

Okay, libvirt is detecting things correctly. So why is virt-manager confused? Using that capabilities output works for me. What virt-manager version are you using? Can you run virt-manager with --debug, connect to xen, open the 'new vm' wizard that shows the error, and post the debug output here? Thanks, Cole