On 08/10/2013 05:38 PM, Deepak C Shetty wrote:
Hi All,
I am trying to do a hotplug of a disk from VDSM (which uses
libvirt to get things done).
I hit the below error "operation failed: open disk image file failed"
comign from virDomainAttachDevice.
Some background:
1) The qemu-img create cmd I use (inside vdsm) to create the file
being hotplugged is
/usr/bin/qemu-img create -f qcow2 -F qcow2 -b
/rhev/data-center/000065de-04b8-42e2-986c-2de664708be7/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399' (cwd /var/run/vdsm)
I even tried using the rel. backing path instead of abs. path as below..
/usr/bin/qemu-img create -f qcow2 -F qcow2 -b
../../../rhev/data-center/000065de-04b8-42e2-986c-2de664708be7/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399' (cwd /var/run/vdsm)
but hit the same error during hotplug operation
2) qemu-img info /var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399
image: /var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399
file format: qcow2
virtual size: 3.8G (4096000000 bytes)
disk size: 196K
cluster_size: 65536
backing file:
/rhev/data-center/000065de-04b8-42e2-986c-2de664708be7/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
backing file format: qcow2
3) ls -l
/rhev/data-center/000065de-04b8-42e2-986c-2de664708be7/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
-r--r-----. 1 vdsm kvm 197120 Aug 10 11:59
/rhev/data-center/000065de-04b8-42e2-986c-2de664708be7/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
The above is the backing file path listing.
Adding the file-to-be-hotplugged path listing below.
ls -l /var/run/vdsm/
total 216
-rw-rw----. 1 vdsm kvm 197120 Aug 10 12:00
3333017d-1278-4bfb-8129-62bded257399
It has the right rw perms....but still I see "open disk image file
failed" error
thanx,
deepak
4) libvirtd.log snippets:
2013-08-10 11:19:41.766+0000: 1103: debug : virDomainAttachDevice:9820
: dom=0x7f92f4003f20, (VM: name=dpk_BR_vm,
uuid=9999017d-1278-4bfb-8129-62bded257399), xml=<disk device="disk"
snapshot="no" type="file">
<source
file="/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399"/>
<target bus="virtio" dev="vdb"/>
<serial>22224c45-6504-4ea1-bd24-12340017dd32</serial>
<driver cache="none" error_policy="stop" io="threads"
name="qemu" type="qcow2"/>
</disk>
2013-08-10 11:19:41.766+0000: 1103: debug :
qemuDomainObjBeginJobInternal:958 : Starting job: modify (async=none)
2013-08-10 11:19:41.766+0000: 1103: debug :
virStorageFileGetMetadata:1007 :
path=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399 format=9
uid=107 gid=107 probe=0
2013-08-10 11:19:41.766+0000: 1103: debug :
virStorageFileGetMetadataRecurse:939 :
path=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399 format=9
uid=107 gid=107 probe=0
2013-08-10 11:19:41.767+0000: 1103: debug :
virStorageFileGetMetadataInternal:687 :
path=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399, fd=25, format=9
2013-08-10 11:19:41.770+0000: 1103: debug :
virStorageFileGetMetadataRecurse:939 :
path=/home/dpkshetty/libSM_disk/localstoragedomain/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399
format=9 uid=107 gid=107 probe=0
2013-08-10 11:19:41.770+0000: 1103: debug :
virStorageFileGetMetadataInternal:687 :
path=/home/dpkshetty/libSM_disk/localstoragedomain/11112d24-4cda-4200-8f6d-a1d8362c70fd/images/22224c45-6504-4ea1-bd24-12340017dd32/3333017d-1278-4bfb-8129-62bded257399,
fd=25, format=9
2013-08-10 11:19:41.770+0000: 1103: debug :
qemuDomainPCIAddressGetNextSlot:1826 : Found free PCI slot 0000:00:05
2013-08-10 11:19:41.770+0000: 1103: debug :
qemuDomainPCIAddressReserveSlot:1710 : Reserving PCI slot 0000:00:05.0
2013-08-10 11:19:41.770+0000: 1103: debug : qemuMonitorAddDrive:2756 :
mon=0x7f92f0007830
drive=file=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399,if=none,id=drive-virtio-disk1,format=qcow2,serial=22224c45-6504-4ea1-bd24-12340017dd32,cache=none,werror=stop,rerror=stop,aio=threads
2013-08-10 11:19:41.770+0000: 1103: debug : qemuMonitorSend:887 :
QEMU_MONITOR_SEND_MSG: mon=0x7f92f0007830
msg={"execute":"human-monitor-command","arguments":{"command-line":"drive_add
dummy
file=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399,if=none,id=drive-virtio-disk1,format=qcow2,serial=22224c45-6504-4ea1-bd24-12340017dd32,cache=none,werror=stop,rerror=stop,aio=threads"},"id":"libvirt-67"}^M
fd=-1
2013-08-10 11:19:41.771+0000: 1091: debug : qemuMonitorIOWrite:453 :
QEMU_MONITOR_IO_WRITE: mon=0x7f92f0007830
buf={"execute":"human-monitor-command","arguments":{"command-line":"drive_add
dummy
file=/var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399,if=none,id=drive-virtio-disk1,format=qcow2,serial=22224c45-6504-4ea1-bd24-12340017dd32,cache=none,werror=stop,rerror=stop,aio=threads"},"id":"libvirt-67"}^M
len=292 ret=292 errno=11
2013-08-10 11:19:41.772+0000: 1091: debug : qemuMonitorIOProcess:345 :
QEMU_MONITOR_IO_PROCESS: mon=0x7f92f0007830 buf={"return": "could not
open disk image /var/run/vdsm/3333017d-1278-4bfb-8129-62bded257399:
Invalid argument\r\n", "id": "libvirt-67"}^M
len=134
2013-08-10 11:19:41.772+0000: 1103: error :
qemuMonitorTextAddDrive:2697 : operation failed: open disk image file
failed
2013-08-10 11:19:41.773+0000: 1103: debug : qemuDomainObjEndJob:1070 :
Stopping job: modify (async=none)
---------------
Any hints on what could be the issues will help. I can try out few
things, if someone could provide suggestions.
thanx,
deepak
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