[Pkg-libvirt-maintainers] Bug#661849: virsh capabilities

[Zak B. Elep]

Just ran across this while trying out libvirt on Xen for squeeze, 
setting up a new VM via either virtinst or virt-manager fails due to 
missing /usr/lib64/xen (which can be worked around by symlinking to 
/usr/lib64/xen-4.0).

Anyhow, here's my `virsh --connect xen:/// capabilities' on a 2-core 
squeeze machine:

<capabilities>

<host>
<cpu>
<arch>x86_64</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='2'>
<cpu id='0'/>
<cpu id='1'/>
</cpus>
</cell>
</cells>
</topology>
</host>

<guest>
<os_type>xen</os_type>
<arch name='x86_64'>
<wordsize>64</wordsize>
<emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
<machine>xenpv</machine>
<domain type='xen'>
</domain>
</arch>
</guest>

<guest>
<os_type>xen</os_type>
<arch name='i686'>
<wordsize>32</wordsize>
<emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
<machine>xenpv</machine>
<domain type='xen'>
</domain>
</arch>
<features>
<pae/>
</features>
</guest>

<guest>
<os_type>hvm</os_type>
<arch name='i686'>
<wordsize>32</wordsize>
<emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
<loader>/usr/lib/xen-default/boot/hvmloader</loader>
<machine>xenfv</machine>
<domain type='xen'>
</domain>
</arch>
<features>
<pae/>
<nonpae/>
<acpi default='on' toggle='yes'/>
<apic default='on' toggle='yes'/>
</features>
</guest>

<guest>
<os_type>hvm</os_type>
<arch name='x86_64'>
<wordsize>64</wordsize>
<emulator>/usr/lib64/xen/bin/qemu-dm</emulator>
<loader>/usr/lib/xen-default/boot/hvmloader</loader>
<machine>xenfv</machine>
<domain type='xen'>
</domain>
</arch>
<features>
<acpi default='on' toggle='yes'/>
<apic default='on' toggle='yes'/>
</features>
</guest>

</capabilities>

Note however, that on a successful virt-install creation, the emulator 
used is on /usr/lib/xen-4.0 . Here's `virsh dumpxml' for a 
debian-unstable VM running on the same squeeze Xen host:

<domain type='xen' id='5'>
<name>debian-unstable</name>
<uuid>5addd29e-e793-50e9-4e9c-15b3af29472a</uuid>
<memory>1048576</memory>
<currentMemory>1048576</currentMemory>
<vcpu>1</vcpu>
<bootloader></bootloader>
<os>
<type>linux</type>
<kernel>/var/lib/xen/virtinst-vmlinuz.9ajPka</kernel>
<initrd>/var/lib/xen/virtinst-initrd.gz.rqIu73</initrd>
<cmdline>method=http://mirror/debian/dists/unstable/main/installer-amd64</cm
dline>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>destroy</on_reboot>
<on_crash>destroy</on_crash>
<devices>
<emulator>/usr/lib/xen-4.0/bin/qemu-dm</emulator>
<disk type='file' device='disk'>
<driver name='file'/>
<devices>
<emulator>/usr/lib/xen-4.0/bin/qemu-dm</emulator>
<disk type='file' device='disk'>
<driver name='file'/>
<source file='/var/lib/libvirt/images/vm-storage/debian-unstable.img'/>
<target dev='xvda' bus='xen'/>
</disk>
<interface type='bridge'>
<mac address='00:16:36:14:7c:a3'/>
<source bridge='br0'/>
<script path='/etc/xen/scripts/vif-bridge'/>
<target dev='vif5.0'/>
</interface>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='xen' port='0'/>
</console>
<input type='mouse' bus='xen'/>
<graphics type='vnc' port='5900' autoport='yes' keymap='en-us'/>
</devices>
</domain>