Public bug reported:
Release: Ubuntu 11.10 (Oneiric)
libvirt-bin: 0.9.2-4ubuntu15.1
qemu-kvm: 0.14.1+noroms-0ubuntu6
Summary: With a running KVM virt, performing an 'attach-disk', then a
'detach-disk', then another 'attach-disk'
in an attempt to reattach the volume at the same point on the virt, fails, with
the qemu reporting back to
libvirt a 'Duplicate ID' error.
Expected behavior: The 2nd invocation of 'attach-disk' should have succeeded
Actual behavior: Duplicate ID error reported
I believe this is most likely a qemu-kvm issue, as the DOM kvm spits back at
libvirt after the 'detach-disk'
does not show the just-detached disk. There is some kind of registry/lookup
for devices in qemu-kvm
and for whatever reason, the entry for the disk does not get removed when it is
detached from the
virt. Specifically, the error gets reported at the 2nd attach-disk attempt
from:
qemu-option.c:qemu_opts_create:697
684 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int
fail_if_exists)
685 {
686 QemuOpts *opts = NULL;
687
688 if (id) {
689 if (!id_wellformed(id)) {
690 qerror_report(QERR_INVALID_PARAMETER_VALUE, "id", "an
identifier");
691 error_printf_unless_qmp("Identifiers consist of letters,
digits, '-', '.', '_', starting with a letter.\n");
692 return NULL;
693 }
694 opts = qemu_opts_find(list, id);
695 if (opts != NULL) {
696 if (fail_if_exists) {
697 qerror_report(QERR_DUPLICATE_ID, id, list->name);
<<<< ====== HERE ===========
698 return NULL;
699 } else {
700 return opts;
701 }
702 }
703 }
704 opts = qemu_mallocz(sizeof(*opts));
705 if (id) {
706 opts->id = qemu_strdup(id);
707 }
708 opts->list = list;
709 loc_save(&opts->loc);
710 QTAILQ_INIT(&opts->head);
711 QTAILQ_INSERT_TAIL(&list->head, opts, next);
712 return opts;
713 }
========================================
Output of my attach/detach/attach
========================================
virsh # attach-disk base1 /var/lib/libvirt/images/extrastorage.img vdb
Disk attached successfully
virsh # dumpxml base1
<domain type='kvm' id='2'>
<name>base1</name>
<uuid>9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</uuid>
<memory>1048576</memory>
<currentMemory>1048576</currentMemory>
<vcpu>2</vcpu>
<os>
<type arch='x86_64' machine='pc-0.14'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu match='exact'>
<model>Opteron_G3</model>
<vendor>AMD</vendor>
<feature policy='require' name='skinit'/>
<feature policy='require' name='vme'/>
<feature policy='require' name='mmxext'/>
<feature policy='require' name='fxsr_opt'/>
<feature policy='require' name='cr8legacy'/>
<feature policy='require' name='ht'/>
<feature policy='require' name='3dnowprefetch'/>
<feature policy='require' name='3dnowext'/>
<feature policy='require' name='wdt'/>
<feature policy='require' name='extapic'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='osvw'/>
<feature policy='require' name='cmp_legacy'/>
<feature policy='require' name='3dnow'/>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='raw'/>
<source file='/dev/rbd1'/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</disk>
<disk type='block' device='disk'>
<driver name='qemu' type='raw'/>
<source dev='/var/lib/libvirt/images/extrastorage.img'/>
<target dev='vdb' bus='virtio'/>
<alias name='virtio-disk1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x07'
function='0x0'/>
</disk>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:a2:c1:2d'/>
<source bridge='br0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/1'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5900' autoport='yes'/>
<sound model='ich6'>
<alias name='sound0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</sound>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor'>
<label>libvirt-9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</label>
<imagelabel>libvirt-9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</imagelabel>
</seclabel>
</domain>
virsh # detach-disk base1 vdb
Disk detached successfully
virsh # dumpxml base1
<domain type='kvm' id='2'>
<name>base1</name>
<uuid>9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</uuid>
<memory>1048576</memory>
<currentMemory>1048576</currentMemory>
<vcpu>2</vcpu>
<os>
<type arch='x86_64' machine='pc-0.14'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
<pae/>
</features>
<cpu match='exact'>
<model>Opteron_G3</model>
<vendor>AMD</vendor>
<feature policy='require' name='skinit'/>
<feature policy='require' name='vme'/>
<feature policy='require' name='mmxext'/>
<feature policy='require' name='fxsr_opt'/>
<feature policy='require' name='cr8legacy'/>
<feature policy='require' name='ht'/>
<feature policy='require' name='3dnowprefetch'/>
<feature policy='require' name='3dnowext'/>
<feature policy='require' name='wdt'/>
<feature policy='require' name='extapic'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='osvw'/>
<feature policy='require' name='cmp_legacy'/>
<feature policy='require' name='3dnow'/>
</cpu>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<devices>
<emulator>/usr/bin/kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='raw'/>
<source file='/dev/rbd1'/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05'
function='0x0'/>
</disk>
<controller type='ide' index='0'>
<alias name='ide0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01'
function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:a2:c1:2d'/>
<source bridge='br0'/>
<target dev='vnet0'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/1'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/1'>
<source path='/dev/pts/1'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='mouse' bus='ps2'/>
<graphics type='vnc' port='5900' autoport='yes'/>
<sound model='ich6'>
<alias name='sound0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04'
function='0x0'/>
</sound>
<video>
<model type='cirrus' vram='9216' heads='1'/>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02'
function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06'
function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor'>
<label>libvirt-9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</label>
<imagelabel>libvirt-9ebebe7f-7dfa-4735-a80c-c19ebe4e1459</imagelabel>
</seclabel>
</domain>
virsh # attach-disk base1 /var/lib/libvirt/images/extrastorage.img vdb
error: Failed to attach disk
error: operation failed: adding
virtio-blk-pci,bus=pci.0,addr=0x8,drive=drive-virtio-disk1,id=virtio-disk1
device failed: Duplicate ID 'virtio-disk1' for device
======================================================
** Affects: qemu-kvm (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/897750
Title:
libvirt/kvm problem with disk attach/detach/reattach on running virt
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/qemu-kvm/+bug/897750/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
