oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
1:41 p.m.
Hello
We use oVirt 4.2.5.2-1.el7 (Hosted engine / 4 hosts in cluster / about twenty virtual
machines)
Virtual machine disks are located on the Data Domain from FC SAN.
Snapshots of all virtual machines are created normally. But for one virtual machine, we
can not create a snapshot.
When we try to create a snapshot in the oVirt web console, we see such errors:
Aug 13, 2018, 1:05:06 PM Failed to complete snapshot 'KOM-APP14_BACKUP01' creation
for VM 'KOM-APP14'.
Aug 13, 2018, 1:05:01 PM VDSM KOM-VM14 command HSMGetAllTasksStatusesVDS failed: Could not
acquire resource. Probably resource factory threw an exception.: ()
Aug 13, 2018, 1:05:00 PM Snapshot 'KOM-APP14_BACKUP01' creation for VM
'KOM-APP14' was initiated by petya@sub.holding.com(a)sub.holding.com-authz.
At this time on the server with the role of "SPM" in the vdsm.log we see this:
...
2018-08-13 05:05:06,471-0500 INFO (jsonrpc/0) [jsonrpc.JsonRpcServer] RPC call
VM.getStats succeeded in 0.00 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (jsonrpc/5) [jsonrpc.JsonRpcServer] RPC call
Image.deleteVolumes succeeded in 0.05 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (tasks/3) [storage.ThreadPool.WorkerThread] START task
bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589 (cmd=<bound method Task.commit of
<vdsm.storage.task.Task instance at 0x7f06b85a2128>>, args=None)
(threadPool:208)
2018-08-13 05:05:07,009-0500 WARN (tasks/3) [storage.ResourceManager] Resource factory
failed to create resource
'01_img_6db73566-0f7f-4438-a9ef-6815075f45ea.cdf1751b-64d3-42bc-b9ef-b0174c7ea068'.
Canceling request. (resourceManager:543)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py", line
539, in registerResource
obj = namespaceObj.factory.createResource(name, lockType)
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py",
line 193, in createResource
lockType)
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py",
line 122, in __getResourceCandidatesList
imgUUID=resourceName)
File "/usr/lib/python2.7/site-packages/vdsm/storage/image.py", line 213, in
getChain
if srcVol.isLeaf():
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 1430, in
isLeaf
return self._manifest.isLeaf()
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 139, in
isLeaf
return self.getVolType() == sc.type2name(sc.LEAF_VOL)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 135, in
getVolType
self.voltype = self.getMetaParam(sc.VOLTYPE)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line 119, in
getMetaParam
meta = self.getMetadata()
File "/usr/lib/python2.7/site-packages/vdsm/storage/blockVolume.py", line 112,
in getMetadata
md = VolumeMetadata.from_lines(lines)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volumemetadata.py", line
103, in from_lines
"Missing metadata key: %s: found: %s" % (e, md))
MetaDataKeyNotFoundError: Meta Data key not found error: ("Missing metadata key:
'DOMAIN': found: {'NONE':
'######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################'}",)
2018-08-13 05:05:07,010-0500 WARN (tasks/3) [storage.ResourceManager.Request]
(ResName='01_img_6db73566-0f7f-4438-a9ef-6815075f45ea.cdf1751b-64d3-42bc-b9ef-b0174c7ea068',
ReqID='3d924e5e-60d1-47b0-86a7-c63585b56f09') Tried to cancel a processed request
(resourceManager:187)
2018-08-13 05:05:07,010-0500 ERROR (tasks/3) [storage.TaskManager.Task]
(Task='bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589') Unexpected error (task:875)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 882, in
_run
return fn(*args, **kargs)
File "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 336, in
run
return self.cmd(*self.argslist, **self.argsdict)
File "/usr/lib/python2.7/site-packages/vdsm/storage/securable.py", line 79, in
wrapper
return method(self, *args, **kwargs)
File "/usr/lib/python2.7/site-packages/vdsm/storage/sp.py", line 1966, in
deleteVolume
with rm.acquireResource(img_ns, imgUUID, rm.EXCLUSIVE):
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py", line
1025, in acquireResource
return _manager.acquireResource(namespace, name, lockType, timeout=timeout)
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py", line
475, in acquireResource
raise se.ResourceAcqusitionFailed()
ResourceAcqusitionFailed: Could not acquire resource. Probably resource factory threw an
exception.: ()
2018-08-13 05:05:07,059-0500 INFO (tasks/3) [storage.ThreadPool.WorkerThread] FINISH task
bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589 (threadPool:210)
2018-08-13 05:05:07,246-0500 INFO (jsonrpc/1) [root]
/usr/libexec/vdsm/hooks/after_get_caps/50_openstacknet: rc=0 err= (hooks:110)
2018-08-13 05:05:07,660-0500 INFO (jsonrpc/1) [root]
/usr/libexec/vdsm/hooks/after_get_caps/openstacknet_utils.py: rc=0 err= (hooks:110)
2018-08-13 05:05:08,152-0500 INFO (jsonrpc/1) [root]
/usr/libexec/vdsm/hooks/after_get_caps/ovirt_provider_ovn_hook: rc=0 err= (hooks:110)
Please help us to solve this problem.
1:30 a.m.
New subject: oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
On Mon, Aug 13, 2018 at 1:45 PM Aleksey Maksimov <
aleksey.i.maksimov(a)yandex.ru> wrote:
We use oVirt 4.2.5.2-1.el7 (Hosted engine / 4 hosts in cluster /
about
twenty virtual machines)
Virtual machine disks are located on the Data Domain from FC SAN.
Snapshots of all virtual machines are created normally. But for one
virtual machine, we can not create a snapshot.
When we try to create a snapshot in the oVirt web console, we see such
errors:
Aug 13, 2018, 1:05:06 PM Failed to complete snapshot 'KOM-APP14_BACKUP01'
creation for VM 'KOM-APP14'.
Aug 13, 2018, 1:05:01 PM VDSM KOM-VM14 command HSMGetAllTasksStatusesVDS
failed: Could not acquire resource. Probably resource factory threw an
exception.: ()
Aug 13, 2018, 1:05:00 PM Snapshot 'KOM-APP14_BACKUP01' creation for VM
'KOM-APP14' was initiated by petya@sub.holding.com(a)sub.holding.com-authz.
At this time on the server with the role of "SPM" in the vdsm.log we see
this:
...
2018-08-13 05:05:06,471-0500 INFO (jsonrpc/0) [jsonrpc.JsonRpcServer] RPC
call VM.getStats succeeded in 0.00 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (jsonrpc/5) [jsonrpc.JsonRpcServer] RPC
call Image.deleteVolumes succeeded in 0.05 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (tasks/3)
[storage.ThreadPool.WorkerThread] START task
bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589 (cmd=<bound method Task.commit of
<vdsm.storage.task.Task instance at 0x7f06b85a2128>>, args=None)
(threadPool:208)
2018-08-13 05:05:07,009-0500 WARN (tasks/3) [storage.ResourceManager]
Resource factory failed to create resource
'01_img_6db73566-0f7f-4438-a9ef-6815075f45ea.cdf1751b-64d3-42bc-b9ef-b0174c7ea068'.
Canceling request. (resourceManager:543)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py",
line 539, in registerResource
obj = namespaceObj.factory.createResource(name, lockType)
File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line
193, in createResource
lockType)
File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line
122, in __getResourceCandidatesList
imgUUID=resourceName)
File "/usr/lib/python2.7/site-packages/vdsm/storage/image.py", line 213,
in getChain
if srcVol.isLeaf():
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
1430, in isLeaf
return self._manifest.isLeaf()
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
139, in isLeaf
return self.getVolType() == sc.type2name(sc.LEAF_VOL)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
135, in getVolType
self.voltype = self.getMetaParam(sc.VOLTYPE)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
119, in getMetaParam
meta = self.getMetadata()
File "/usr/lib/python2.7/site-packages/vdsm/storage/blockVolume.py",
line 112, in getMetadata
md = VolumeMetadata.from_lines(lines)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volumemetadata.py",
line 103, in from_lines
"Missing metadata key: %s: found: %s" % (e, md))
MetaDataKeyNotFoundError: Meta Data key not found error: ("Missing
metadata key: 'DOMAIN': found: {'NONE':
'######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################'}",)
Looks like you have a volume without metadata in the chain.
This may happen in the past when deleting a volume failed, but we
cleared the volume metadata. In current 4.2, this cannot happen, since
we clear the metadata only if deleting the volume succeeded.
Can you post complete vdsm log with this error?
Once we find the volume without metadata, we can delete the LV
using lvremove. This will fix the issue.
Shani, do you remember the bug we have with this error?
this probably the same issue.
Ala, I think we need to add a tool to check and repair such chains.
Nir
3:33 p.m.
New subject: oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
On Tue, Aug 14, 2018 at 6:03 PM Алексей Максимов <
aleksey.i.maksimov(a)yandex.ru> wrote:
Hello, Nir
Log in attachment.
In the log we can see both createVolume and deleteVolume fail for this disk
uuid:
cdf1751b-64d3-42bc-b9ef-b0174c7ea068
1. Please share the output of this command on one of the hosts:
lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
This will show all the volumes belonging to this disk.
2. For every volume, share the output of qemu-img info:
If the lv is not active, activate it:
lvchange -ay vg_name/lv_name
Then run qemu-img info to find the actual chain:
qemu-img info --backing /dev/vg_name/lv_name
If the lv was not active, deactivate it - we don't want to leave unused lvs
active.
lvchange -an vg_name/lv_name
3. On of the volume in the chain will not be part of the chain.
No other volume will use it as backing file, and it may not have a backing
file, or it may point to another volume in the chain.
Once we found this volume, please check engine logs for this volume uuid.
You will probaly
find that the volume was deleted in the past. Maybe you will not find it
since it was deleted
months or years ago.
4. To verify that this volume does not have metadata, check the volume MD_N
tag.
N is the offset in 512 bytes blocks from the start of the metadata volume.
This will read the volume metadata block:
dd if=dev/vg_name/metadata bs=512 count=1 skip=N iflag=direct
We expect to see:
NONE=####################################################...
5. To remove this volume use:
lvremove vg_name/lv_name
Once the volume is removed, you will be able to create snapshot.
14.08.2018, 01:30, "Nir Soffer" <nsoffer(a)redhat.com>:
On Mon, Aug 13, 2018 at 1:45 PM Aleksey Maksimov <
aleksey.i.maksimov(a)yandex.ru> wrote:
We use oVirt 4.2.5.2-1.el7 (Hosted engine / 4 hosts in cluster / about
twenty virtual machines)
Virtual machine disks are located on the Data Domain from FC SAN.
Snapshots of all virtual machines are created normally. But for one
virtual machine, we can not create a snapshot.
When we try to create a snapshot in the oVirt web console, we see such
errors:
Aug 13, 2018, 1:05:06 PM Failed to complete snapshot 'KOM-APP14_BACKUP01'
creation for VM 'KOM-APP14'.
Aug 13, 2018, 1:05:01 PM VDSM KOM-VM14 command HSMGetAllTasksStatusesVDS
failed: Could not acquire resource. Probably resource factory threw an
exception.: ()
Aug 13, 2018, 1:05:00 PM Snapshot 'KOM-APP14_BACKUP01' creation for VM
'KOM-APP14' was initiated by petya@sub.holding.com(a)sub.holding.com-authz.
At this time on the server with the role of "SPM" in the vdsm.log we see
this:
...
2018-08-13 05:05:06,471-0500 INFO (jsonrpc/0) [jsonrpc.JsonRpcServer]
RPC call VM.getStats succeeded in 0.00 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (jsonrpc/5) [jsonrpc.JsonRpcServer]
RPC call Image.deleteVolumes succeeded in 0.05 seconds (__init__:573)
2018-08-13 05:05:06,478-0500 INFO (tasks/3)
[storage.ThreadPool.WorkerThread] START task
bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589 (cmd=<bound method Task.commit of
<vdsm.storage.task.Task instance at 0x7f06b85a2128>>, args=None)
(threadPool:208)
2018-08-13 05:05:07,009-0500 WARN (tasks/3) [storage.ResourceManager]
Resource factory failed to create resource '01_img_6db73566-0f7f-4438-a9ef-
6815075f45ea.cdf1751b-64d3-42bc-b9ef-b0174c7ea068'. Canceling request.
(resourceManager:543)
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py",
line 539, in registerResource
obj = namespaceObj.factory.createResource(name, lockType)
File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line
193, in createResource
lockType)
File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line
122, in __getResourceCandidatesList
imgUUID=resourceName)
File "/usr/lib/python2.7/site-packages/vdsm/storage/image.py", line 213,
in getChain
if srcVol.isLeaf():
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
1430, in isLeaf
return self._manifest.isLeaf()
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
139, in isLeaf
return self.getVolType() == sc.type2name(sc.LEAF_VOL)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
135, in getVolType
self.voltype = self.getMetaParam(sc.VOLTYPE)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py", line
119, in getMetaParam
meta = self.getMetadata()
File "/usr/lib/python2.7/site-packages/vdsm/storage/blockVolume.py",
line 112, in getMetadata
md = VolumeMetadata.from_lines(lines)
File "/usr/lib/python2.7/site-packages/vdsm/storage/volumemetadata.py",
line 103, in from_lines
"Missing metadata key: %s: found: %s" % (e, md))
MetaDataKeyNotFoundError: Meta Data key not found error: ("Missing
metadata key: 'DOMAIN': found: {'NONE':
'######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################'}",)
Looks like you have a volume without metadata in the chain.
This may happen in the past when deleting a volume failed, but we
cleared the volume metadata. In current 4.2, this cannot happen, since
we clear the metadata only if deleting the volume succeeded.
Can you post complete vdsm log with this error?
Once we find the volume without metadata, we can delete the LV
using lvremove. This will fix the issue.
Shani, do you remember the bug we have with this error?
this probably the same issue.
Ala, I think we need to add a tool to check and repair such chains.
Nir
--
С наилучшими пожеланиями,
Максимов Алексей
Email: Aleksey.I.Maksimov(a)Yandex.ru
6:14 p.m.
Hello Nir
Thanks for the answer.
The output of the commands is below.
*********************************************************************************************************************************************
1. Please share the output of this command on one of the hosts:
lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
*********************************************************************************************************************************************
# lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
VG LV LV Tags
...
6db73566-0f7f-4438-a9ef-6815075f45ea 208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
6db73566-0f7f-4438-a9ef-6815075f45ea 4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
6db73566-0f7f-4438-a9ef-6815075f45ea 8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
...
*********************************************************************************************************************************************
2. For every volume, share the output of qemu-img info:
If the lv is not active, activate it:
lvchange -ay vg_name/lv_name
*********************************************************************************************************************************************
# lvdisplay 6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
--- Logical volume ---
LV Path
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
LV Name 208ece15-1c71-46f2-a019-6a9fce4309b2
VG Name 6db73566-0f7f-4438-a9ef-6815075f45ea
LV UUID k28hUo-Z6t7-wKdO-x7kz-ceYL-Vuzx-f9jLWi
LV Write Access read/write
LV Creation host, time VM32.sub.holding.com, 2017-12-05 14:46:42 +0300
LV Status NOT available
LV Size 33.00 GiB
Current LE 264
Segments 4
Allocation inherit
Read ahead sectors auto
# lvdisplay 6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
--- Logical volume ---
LV Path
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
LV Name 4974a4cc-b388-456f-b98e-19d2158f0d58
VG Name 6db73566-0f7f-4438-a9ef-6815075f45ea
LV UUID HnnP01-JGxU-9zne-HB6n-BcaE-2lrM-qr9KPI
LV Write Access read/write
LV Creation host, time VM12.sub.holding.com, 2018-07-31 03:35:20 +0300
LV Status NOT available
LV Size 2.00 GiB
Current LE 16
Segments 1
Allocation inherit
Read ahead sectors auto
# lvdisplay 6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
--- Logical volume ---
LV Path
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
LV Name 8c66f617-7add-410c-b546-5214b0200832
VG Name 6db73566-0f7f-4438-a9ef-6815075f45ea
LV UUID MG1VRN-IqRn-mOGm-F4ul-ufbZ-Dywb-M3V14P
LV Write Access read/write
LV Creation host, time VM12.sub.holding.com, 2018-08-01 03:34:31 +0300
LV Status NOT available
LV Size 1.00 GiB
Current LE 8
Segments 1
Allocation inherit
Read ahead sectors auto
# lvchange -ay 6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
# lvchange -ay 6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
# lvchange -ay 6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
*********************************************************************************************************************************************
qemu-img info --backing /dev/vg_name/lv_name
*********************************************************************************************************************************************
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
image: /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
image: /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
backing file format: qcow2
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
image: /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
image: /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
backing file format: qcow2
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
image: /dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
Do not quite understand. What should I do next?
15.08.2018, 15:33, "Nir Soffer" <nsoffer(a)redhat.com>:
On Tue, Aug 14, 2018 at 6:03 PM Алексей Максимов
<aleksey.i.maksimov(a)yandex.ru> wrote:
> Hello, Nir
>
> Log in attachment.
In the log we can see both createVolume and deleteVolume fail for this disk uuid:
cdf1751b-64d3-42bc-b9ef-b0174c7ea068
1. Please share the output of this command on one of the hosts:
lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
This will show all the volumes belonging to this disk.
2. For every volume, share the output of qemu-img info:
If the lv is not active, activate it:
lvchange -ay vg_name/lv_name
Then run qemu-img info to find the actual chain:
qemu-img info --backing /dev/vg_name/lv_name
If the lv was not active, deactivate it - we don't want to leave unused lvs active.
lvchange -an vg_name/lv_name
3. On of the volume in the chain will not be part of the chain.
No other volume will use it as backing file, and it may not have a backing
file, or it may point to another volume in the chain.
Once we found this volume, please check engine logs for this volume uuid. You will
probaly
find that the volume was deleted in the past. Maybe you will not find it since it was
deleted
months or years ago.
4. To verify that this volume does not have metadata, check the volume MD_N tag.
N is the offset in 512 bytes blocks from the start of the metadata volume.
This will read the volume metadata block:
dd if=dev/vg_name/metadata bs=512 count=1 skip=N iflag=direct
We expect to see:
NONE=####################################################...
5. To remove this volume use:
lvremove vg_name/lv_name
Once the volume is removed, you will be able to create snapshot.
> 14.08.2018, 01:30, "Nir Soffer" <nsoffer(a)redhat.com>:
>> On Mon, Aug 13, 2018 at 1:45 PM Aleksey Maksimov
<aleksey.i.maksimov(a)yandex.ru> wrote:
>>> We use oVirt 4.2.5.2-1.el7 (Hosted engine / 4 hosts in cluster / about twenty
virtual machines)
>>> Virtual machine disks are located on the Data Domain from FC SAN.
>>> Snapshots of all virtual machines are created normally. But for one virtual
machine, we can not create a snapshot.
>>>
>>> When we try to create a snapshot in the oVirt web console, we see such
errors:
>>>
>>> Aug 13, 2018, 1:05:06 PM Failed to complete snapshot
'KOM-APP14_BACKUP01' creation for VM 'KOM-APP14'.
>>> Aug 13, 2018, 1:05:01 PM VDSM KOM-VM14 command HSMGetAllTasksStatusesVDS
failed: Could not acquire resource. Probably resource factory threw an exception.: ()
>>> Aug 13, 2018, 1:05:00 PM Snapshot 'KOM-APP14_BACKUP01' creation for
VM 'KOM-APP14' was initiated by petya@sub.holding.com(a)sub.holding.com-authz.
>>>
>>> At this time on the server with the role of "SPM" in the vdsm.log
we see this:
>>>
>>> ...
>>> 2018-08-13 05:05:06,471-0500 INFO (jsonrpc/0) [jsonrpc.JsonRpcServer] RPC
call VM.getStats succeeded in 0.00 seconds (__init__:573)
>>> 2018-08-13 05:05:06,478-0500 INFO (jsonrpc/5) [jsonrpc.JsonRpcServer] RPC
call Image.deleteVolumes succeeded in 0.05 seconds (__init__:573)
>>> 2018-08-13 05:05:06,478-0500 INFO (tasks/3)
[storage.ThreadPool.WorkerThread] START task bb45ae7e-77e9-4fec-9ee2-8e1f0ad3d589
(cmd=<bound method Task.commit of <vdsm.storage.task.Task instance at
0x7f06b85a2128>>, args=None) (threadPool:208)
>>> 2018-08-13 05:05:07,009-0500 WARN (tasks/3) [storage.ResourceManager]
Resource factory failed to create resource
'01_img_6db73566-0f7f-4438-a9ef-6815075f45ea.cdf1751b-64d3-42bc-b9ef-b0174c7ea068'.
Canceling request. (resourceManager:543)
>>> Traceback (most recent call last):
>>> File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceManager.py", line 539, in
registerResource
>>> obj = namespaceObj.factory.createResource(name, lockType)
>>> File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line 193,
in createResource
>>> lockType)
>>> File
"/usr/lib/python2.7/site-packages/vdsm/storage/resourceFactories.py", line 122,
in __getResourceCandidatesList
>>> imgUUID=resourceName)
>>> File "/usr/lib/python2.7/site-packages/vdsm/storage/image.py",
line 213, in getChain
>>> if srcVol.isLeaf():
>>> File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py",
line 1430, in isLeaf
>>> return self._manifest.isLeaf()
>>> File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py",
line 139, in isLeaf
>>> return self.getVolType() == sc.type2name(sc.LEAF_VOL)
>>> File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py",
line 135, in getVolType
>>> self.voltype = self.getMetaParam(sc.VOLTYPE)
>>> File "/usr/lib/python2.7/site-packages/vdsm/storage/volume.py",
line 119, in getMetaParam
>>> meta = self.getMetadata()
>>> File
"/usr/lib/python2.7/site-packages/vdsm/storage/blockVolume.py", line 112, in
getMetadata
>>> md = VolumeMetadata.from_lines(lines)
>>> File
"/usr/lib/python2.7/site-packages/vdsm/storage/volumemetadata.py", line 103, in
from_lines
>>> "Missing metadata key: %s: found: %s" % (e, md))
>>> MetaDataKeyNotFoundError: Meta Data key not found error: ("Missing
metadata key: 'DOMAIN': found: {'NONE':
'######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################'}",)
>>
>> Looks like you have a volume without metadata in the chain.
>>
>> This may happen in the past when deleting a volume failed, but we
>> cleared the volume metadata. In current 4.2, this cannot happen, since
>> we clear the metadata only if deleting the volume succeeded.
>>
>> Can you post complete vdsm log with this error?
>>
>> Once we find the volume without metadata, we can delete the LV
>> using lvremove. This will fix the issue.
>>
>> Shani, do you remember the bug we have with this error?
>> this probably the same issue.
>>
>> Ala, I think we need to add a tool to check and repair such chains.
>>
>> Nir
9:09 p.m.
New subject: oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
On Wed, Aug 15, 2018 at 6:14 PM Алексей Максимов <
aleksey.i.maksimov(a)yandex.ru> wrote:
Hello Nir
Thanks for the answer.
The output of the commands is below.
*********************************************************************************************************************************************
> 1. Please share the output of this command on one of the hosts:
> lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
*********************************************************************************************************************************************
# lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
VG LV
LV Tags
...
6db73566-0f7f-4438-a9ef-6815075f45ea
208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
6db73566-0f7f-4438-a9ef-6815075f45ea
4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
6db73566-0f7f-4438-a9ef-6815075f45ea
8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
So we have 2 volumes - 2 are base volumes:
- 208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
- 4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
And one is top volume:
- 8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
So according to vdsm, this is the chain:
208ece15-1c71-46f2-a019-6a9fce4309b2 <-
8c66f617-7add-410c-b546-5214b0200832 (top)
The volume 4974a4cc-b388-456f-b98e-19d2158f0d58 is not part of this chain.
*********************************************************************************************************************************************
> qemu-img info --backing /dev/vg_name/lv_name
*********************************************************************************************************************************************
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
This is the base volume according to vdsm and qemu, good.
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
backing file format: qcow2
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
This is the deleted volume according to vdsm metadata. We can see that this
volume
still has a backing file pointing to the base volume.
# qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
backing file format: qcow2
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
file format: qcow2
virtual size: 30G (32212254720 bytes)
disk size: 0
cluster_size: 65536
Format specific information:
compat: 1.1
lazy refcounts: false
refcount bits: 16
corrupt: false
This is top top volume.
So I think this is what happened:
You had this chain in the past:
208ece15-1c71-46f2-a019-6a9fce4309b2 <-
4974a4cc-b388-456f-b98e-19d2158f0d5 <- 8c66f617-7add-410c-b546-5214b0200832
(top)
You deleted a snapshot in engine, which created the new chain:
208ece15-1c71-46f2-a019-6a9fce4309b2 <-
8c66f617-7add-410c-b546-5214b0200832 (top)
<-
4974a4cc-b388-456f-b98e-19d2158f0d5 (deleted)
Deleting 4974a4cc-b388-456f-b98e-19d2158f0d5 failed, but we cleared the
metadata
of this volume.
To confirm this theory, please share the output of:
Top volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=16 iflag=direct
Base volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=23 iflag=direct
Deleted volume?:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=15 iflag=direct
Nir
10:30 p.m.
Hello Nir
To confirm this theory, please share the output of:
Top volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=16
iflag=direct
DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
CTIME=1533083673
FORMAT=COW
DISKTYPE=DATA
LEGALITY=LEGAL
SIZE=62914560
VOLTYPE=LEAF
DESCRIPTION=
IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
PUUID=208ece15-1c71-46f2-a019-6a9fce4309b2
MTIME=0
POOL_UUID=
TYPE=SPARSE
GEN=0
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000348555 s, 1.5 MB/s
Base volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=23
iflag=direct
DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
CTIME=1512474404
FORMAT=COW
DISKTYPE=2
LEGALITY=LEGAL
SIZE=62914560
VOLTYPE=INTERNAL
DESCRIPTION={"DiskAlias":"KOM-APP14_Disk1","DiskDescription":""}
IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
PUUID=00000000-0000-0000-0000-000000000000
MTIME=0
POOL_UUID=
TYPE=SPARSE
GEN=0
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.00031362 s, 1.6 MB/s
Deleted volume?:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=15
iflag=direct
NONE=######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000350361 s, 1.5 MB/s
15.08.2018, 21:09, "Nir Soffer" <nsoffer(a)redhat.com>:
On Wed, Aug 15, 2018 at 6:14 PM Алексей Максимов
<aleksey.i.maksimov(a)yandex.ru> wrote:
> Hello Nir
>
> Thanks for the answer.
> The output of the commands is below.
>
>
*********************************************************************************************************************************************
>> 1. Please share the output of this command on one of the hosts:
>> lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
>
*********************************************************************************************************************************************
> # lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
>
> VG LV LV Tags
> ...
> 6db73566-0f7f-4438-a9ef-6815075f45ea 208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
> 6db73566-0f7f-4438-a9ef-6815075f45ea 4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
> 6db73566-0f7f-4438-a9ef-6815075f45ea 8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
So we have 2 volumes - 2 are base volumes:
- 208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
- 4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
And one is top volume:
- 8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
So according to vdsm, this is the chain:
208ece15-1c71-46f2-a019-6a9fce4309b2 <- 8c66f617-7add-410c-b546-5214b0200832
(top)
The volume 4974a4cc-b388-456f-b98e-19d2158f0d58 is not part of this chain.
>
*********************************************************************************************************************************************
>> qemu-img info --backing /dev/vg_name/lv_name
>
*********************************************************************************************************************************************
>
> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
>
> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> file format: qcow2
> virtual size: 30G (32212254720 bytes)
> disk size: 0
> cluster_size: 65536
> Format specific information:
> compat: 1.1
> lazy refcounts: false
> refcount bits: 16
> corrupt: false
This is the base volume according to vdsm and qemu, good.
> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
>
> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
> file format: qcow2
> virtual size: 30G (32212254720 bytes)
> disk size: 0
> cluster_size: 65536
> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
> backing file format: qcow2
> Format specific information:
> compat: 1.1
> lazy refcounts: false
> refcount bits: 16
> corrupt: false
>
> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> file format: qcow2
> virtual size: 30G (32212254720 bytes)
> disk size: 0
> cluster_size: 65536
> Format specific information:
> compat: 1.1
> lazy refcounts: false
> refcount bits: 16
> corrupt: false
This is the deleted volume according to vdsm metadata. We can see that this volume
still has a backing file pointing to the base volume.
> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
>
> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
> file format: qcow2
> virtual size: 30G (32212254720 bytes)
> disk size: 0
> cluster_size: 65536
> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
> backing file format: qcow2
> Format specific information:
> compat: 1.1
> lazy refcounts: false
> refcount bits: 16
> corrupt: false
>
> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
> file format: qcow2
> virtual size: 30G (32212254720 bytes)
> disk size: 0
> cluster_size: 65536
> Format specific information:
> compat: 1.1
> lazy refcounts: false
> refcount bits: 16
> corrupt: false
This is top top volume.
So I think this is what happened:
You had this chain in the past:
208ece15-1c71-46f2-a019-6a9fce4309b2 <- 4974a4cc-b388-456f-b98e-19d2158f0d5 <-
8c66f617-7add-410c-b546-5214b0200832 (top)
You deleted a snapshot in engine, which created the new chain:
208ece15-1c71-46f2-a019-6a9fce4309b2 <- 8c66f617-7add-410c-b546-5214b0200832
(top)
<-
4974a4cc-b388-456f-b98e-19d2158f0d5 (deleted)
Deleting 4974a4cc-b388-456f-b98e-19d2158f0d5 failed, but we cleared the metadata
of this volume.
To confirm this theory, please share the output of:
Top volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=16
iflag=direct
Base volume:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=23
iflag=direct
Deleted volume?:
dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1 skip=15
iflag=direct
Nir
11:59 p.m.
New subject: oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
On Wed, Aug 15, 2018 at 10:30 PM Алексей Максимов <
aleksey.i.maksimov(a)yandex.ru> wrote:
Hello Nir
> To confirm this theory, please share the output of:
> Top volume:
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=16 iflag=direct
DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
CTIME=1533083673
FORMAT=COW
DISKTYPE=DATA
LEGALITY=LEGAL
SIZE=62914560
VOLTYPE=LEAF
DESCRIPTION=
IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
PUUID=208ece15-1c71-46f2-a019-6a9fce4309b2
MTIME=0
POOL_UUID=
TYPE=SPARSE
GEN=0
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000348555 s, 1.5 MB/s
> Base volume:
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=23 iflag=direct
DOMAIN=6db73566-0f7f-4438-a9ef-6815075f45ea
CTIME=1512474404
FORMAT=COW
DISKTYPE=2
LEGALITY=LEGAL
SIZE=62914560
VOLTYPE=INTERNAL
DESCRIPTION={"DiskAlias":"KOM-APP14_Disk1","DiskDescription":""}
IMAGE=cdf1751b-64d3-42bc-b9ef-b0174c7ea068
PUUID=00000000-0000-0000-0000-000000000000
MTIME=0
POOL_UUID=
TYPE=SPARSE
GEN=0
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.00031362 s, 1.6 MB/s
> Deleted volume?:
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=15 iflag=direct
NONE=######################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################
EOF
1+0 records in
1+0 records out
512 bytes (512 B) copied, 0.000350361 s, 1.5 MB/s
This confirms that
6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
is a deleted volume.
To fix this VM, please remove this volume. Run these commands on the SPM
host:
systemctl stop vdsmd
lvremove 6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
systemctl start vdsmd
You should be able to create snapshot after that.
15.08.2018, 21:09, "Nir Soffer" <nsoffer(a)redhat.com>:
> On Wed, Aug 15, 2018 at 6:14 PM Алексей Максимов <
aleksey.i.maksimov(a)yandex.ru> wrote:
>> Hello Nir
>>
>> Thanks for the answer.
>> The output of the commands is below.
>>
>>
*********************************************************************************************************************************************
>>> 1. Please share the output of this command on one of the hosts:
>>> lvs -o vg_name,lv_name,tags | grep cdf1751b-64d3-42bc-b9ef-b0174c7ea068
>>
*********************************************************************************************************************************************
>> # lvs -o vg_name,lv_name,tags | grep
cdf1751b-64d3-42bc-b9ef-b0174c7ea068
>>
>> VG LV
LV Tags
>> ...
>> 6db73566-0f7f-4438-a9ef-6815075f45ea
208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
>> 6db73566-0f7f-4438-a9ef-6815075f45ea
4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
>> 6db73566-0f7f-4438-a9ef-6815075f45ea
8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
>
> So we have 2 volumes - 2 are base volumes:
>
> - 208ece15-1c71-46f2-a019-6a9fce4309b2
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_23,PU_00000000-0000-0000-0000-000000000000
> - 4974a4cc-b388-456f-b98e-19d2158f0d58
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_15,PU_00000000-0000-0000-0000-000000000000
>
> And one is top volume:
> - 8c66f617-7add-410c-b546-5214b0200832
IU_cdf1751b-64d3-42bc-b9ef-b0174c7ea068,MD_16,PU_208ece15-1c71-46f2-a019-6a9fce4309b2
>
> So according to vdsm, this is the chain:
>
> 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
8c66f617-7add-410c-b546-5214b0200832 (top)
>
> The volume 4974a4cc-b388-456f-b98e-19d2158f0d58 is not part of this
chain.
>
>>
*********************************************************************************************************************************************
>>> qemu-img info --backing /dev/vg_name/lv_name
>>
*********************************************************************************************************************************************
>>
>> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
>>
>> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
>> file format: qcow2
>> virtual size: 30G (32212254720 bytes)
>> disk size: 0
>> cluster_size: 65536
>> Format specific information:
>> compat: 1.1
>> lazy refcounts: false
>> refcount bits: 16
>> corrupt: false
>
> This is the base volume according to vdsm and qemu, good.
>
>> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
>>
>> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/4974a4cc-b388-456f-b98e-19d2158f0d58
>> file format: qcow2
>> virtual size: 30G (32212254720 bytes)
>> disk size: 0
>> cluster_size: 65536
>> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
>> backing file format: qcow2
>> Format specific information:
>> compat: 1.1
>> lazy refcounts: false
>> refcount bits: 16
>> corrupt: false
>>
>> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
>> file format: qcow2
>> virtual size: 30G (32212254720 bytes)
>> disk size: 0
>> cluster_size: 65536
>> Format specific information:
>> compat: 1.1
>> lazy refcounts: false
>> refcount bits: 16
>> corrupt: false
>
> This is the deleted volume according to vdsm metadata. We can see that
this volume
> still has a backing file pointing to the base volume.
>
>> # qemu-img info --backing
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
>>
>> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/8c66f617-7add-410c-b546-5214b0200832
>> file format: qcow2
>> virtual size: 30G (32212254720 bytes)
>> disk size: 0
>> cluster_size: 65536
>> backing file: 208ece15-1c71-46f2-a019-6a9fce4309b2 (actual path:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2)
>> backing file format: qcow2
>> Format specific information:
>> compat: 1.1
>> lazy refcounts: false
>> refcount bits: 16
>> corrupt: false
>>
>> image:
/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/208ece15-1c71-46f2-a019-6a9fce4309b2
>> file format: qcow2
>> virtual size: 30G (32212254720 bytes)
>> disk size: 0
>> cluster_size: 65536
>> Format specific information:
>> compat: 1.1
>> lazy refcounts: false
>> refcount bits: 16
>> corrupt: false
>
> This is top top volume.
>
> So I think this is what happened:
>
> You had this chain in the past:
>
> 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
4974a4cc-b388-456f-b98e-19d2158f0d5 <- 8c66f617-7add-410c-b546-5214b0200832
(top)
>
> You deleted a snapshot in engine, which created the new chain:
>
> 208ece15-1c71-46f2-a019-6a9fce4309b2 <-
8c66f617-7add-410c-b546-5214b0200832 (top)
>
<- 4974a4cc-b388-456f-b98e-19d2158f0d5 (deleted)
>
> Deleting 4974a4cc-b388-456f-b98e-19d2158f0d5 failed, but we cleared the
metadata
> of this volume.
>
> To confirm this theory, please share the output of:
>
> Top volume:
>
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=16 iflag=direct
>
> Base volume:
>
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=23 iflag=direct
>
> Deleted volume?:
>
> dd if=/dev/6db73566-0f7f-4438-a9ef-6815075f45ea/metadata bs=512 count=1
skip=15 iflag=direct
> Nir
11:36 a.m.
New subject: oVirt 4.2.5 : VM snapshot creation does not work : command HSMGetAllTasksStatusesVDS failed: Could not acquire resource
Hello Nir
Many thanks for your help.
The problem is solved.
2094
days inactive
2098
days old
8 comments
3 participants
participants (3)
-
Aleksey Maksimov -
Nir Soffer -
Алексей Максимов