[libvirt] libvirt will create two guest with the same name, but with different UUIDs
Hi,
libvirt allows you to create two guests with same name, but with
different UUIDs.
This causes some problems in the reporting though. virsh will report
that a guest is running (when it isn't). This also causes some confusion
for the dominfo call - virsh will only return info for one of the
guests. I've seen similar issues when using the virDomainLookupByName()
API.
I suspect all the issues are the same bug, but I haven't had a chance to
track down where.
Thanks!
# virsh version
Compiled against library: libvir 0.6.3
Using library: libvir 0.6.3
Using API: QEMU 0.6.3
Running hypervisor: QEMU 0.9.1
# virsh list --all
Id Name State
----------------------------------
109 demo2 running
- domU1 shut off
- test_domain shut off
# virsh dumpxml demo2
<domain type='kvm' id='109'>
<name>demo2</name>
<uuid>4dea24b3-1d52-d8f3-2516-782e98a23fa0</uuid>
<memory>131072</memory>
<currentMemory>131072</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>restart</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='file' device='disk'>
<source file='/tmp/default-kvm-dimage'/>
<target dev='hda' bus='ide'/>
</disk>
<interface type='user'>
<mac address='24:42:53:21:52:45'/>
</interface>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5900' autoport='yes'/>
</devices>
</domain>
# cat demo2
<domain type='kvm' id='55'>
<name>demo2</name>
<uuid>4dea24b3-1d52-d8f3-2516-782e98a23fa3</uuid>
<memory>131072</memory>
<currentMemory>131072</currentMemory>
<vcpu>1</vcpu>
<os>
<type arch='i686' machine='pc'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>restart</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/qemu-kvm</emulator>
<disk type='file' device='disk'>
<source file='/tmp/default-kvm-dimage'/>
<target dev='hda' bus='ide'/>
</disk>
<interface type='user'>
<mac address='24:42:53:21:52:45'/>
</interface>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5902' autoport='yes'/>
</devices>
</domain>
# virsh define demo2
Domain demo2 defined from demo2
# virsh list --all
Id Name State
----------------------------------
109 demo2 running
- demo2 running
- domU1 shut off
- test_domain shut off
# ps -ef | grep qemu
root 11464 1 96 09:04 ? 00:02:12 /usr/bin/qemu-kvm -S -M
pc -cpu qemu32 -m 128 -smp 1 -name demo2 -uuid
4dea24b3-1d52-d8f3-2516-782e98a23fa0 -monitor pty -pidfile
/var/run/libvirt/qemu//demo2.pid -no-acpi -boot c -drive
file=/tmp/default-kvm-dimage,if=ide,index=0,boot=on -net
nic,macaddr=24:42:53:21:52:45,vlan=0 -net user,vlan=0 -serial none
-parallel none -usb -vnc 127.0.0.1:0
root 11483 27407 0 09:06 pts/1 00:00:00 grep qemu
#
--
Kaitlin Rupert
IBM Linux Technology Center
kaitlin(a)linux.vnet.ibm.com