On Mon, Mar 6, 2017 at 1:03 AM, Marcin Kruk <askifyouneed@gmail.com> wrote: Please reply to the list, other users may find this discussion valuable.
1. perfect and clear explanation 2. Could you explain "These are probably OVF_STORE volumes, used to keep vms ovs.", what is vms ovs, and what valuable information is in te ovf file which you extracted?
OVF is standard format for describing a VM: https://en.wikipedia.org/wiki/Open_Virtualization_Format All the VM that have a disk on a storage domain are stored in the OVF_STORE disks using OVF format, so you can restore all the VM from storage if you lost your engine database. Or, if you want to move entire storage domain from one setup to another, you can detach the storage domain from one setup, attach to the other setup, and import all the VMs. The OVF is also used by hosted engine to obtain engine vm setup from storage, and start the engine vm after a host is rebooted.
3. perfect and clear Thank you
2017-03-05 12:32 GMT+01:00 Nir Soffer <nsoffer@redhat.com>:
On Sun, Mar 5, 2017 at 10:08 AM, Marcin Kruk <askifyouneed@gmail.com> wrote:
VDSM side, means RHV HOST side, right? I missed LVM tags, so the command: lvs -o vg_name,name,lv_tags is very helpful, thanks.
1. Is it a tool in command line to show: disk ID, alias, atached to fields?
No, you need to extract this info manually.
Here is an example
# lvs -o lv_name,size,attr,tags aed577ea-d1ca-4ebe-af80-f852c7ce59bb LV LSize Attr LV Tags 91799827-85b8-450d-a521-42de12fa08e6 1.00g -wi-ao----
IU_db343be2-f709-4835-b1c5-a1bbdb650b2a,MD_8,PU_93331705-46be-4cb8-9dc2-c1559843fd4a 93331705-46be-4cb8-9dc2-c1559843fd4a 3.00g -wi-ao----
IU_239d9e96-ad7d-4a7d-83af-d593877db11b,MD_7,PU_00000000-0000-0000-0000-000000000000 dfbf69fc-3371-42d4-8298-415a6ad4244a 128.00m -wi-------
IU_7324cafc-905f-475e-8217-1a919bcca9e9,MD_5,PU_00000000-0000-0000-0000-000000000000 ea556b30-e62b-4d66-b832-459a5dd01890 128.00m -wi-------
IU_aab45dbc-c016-4990-b834-ce455bbc4fef,MD_4,PU_00000000-0000-0000-0000-000000000000 ids 128.00m -wi-ao---- inbox 128.00m -wi-a----- leases 2.00g -wi-a----- master 1.00g -wi-ao---- metadata 512.00m -wi-a----- outbox 128.00m -wi-a----- xleases 1.00g -wi-a-----
What is dfbf69fc-3371-42d4-8298-415a6ad4244a?
MD_5 means this volume metadata is at offset 5 * 512 in 143dc2d0-8e1a-4b95-a306-2a26a7b4832f metadata
# dd if=/dev/aed577ea-d1ca-4ebe-af80-f852c7ce59bb/metadata bs=512 count=1 skip=5
# dd if=/dev/aed577ea-d1ca-4ebe-af80-f852c7ce59bb/metadata bs=512 count=1 skip=5 DOMAIN=aed577ea-d1ca-4ebe-af80-f852c7ce59bb CTIME=1487525999 FORMAT=RAW DISKTYPE=2 LEGALITY=LEGAL SIZE=262144 VOLTYPE=LEAF DESCRIPTION={"Updated":true,"Size":30720,"Last Updated":"Fri Feb 24 20:49:24 EST 2017","Storage Domains":[{"uuid":"aed577ea-d1ca-4ebe-af80-f852c7ce59bb"}],"Disk Description":"OVF_STORE"} IMAGE=7324cafc-905f-475e-8217-1a919bcca9e9 PUUID=00000000-0000-0000-0000-000000000000 MTIME=0 POOL_UUID= TYPE=PREALLOCATED GEN=0 EOF 1+0 records in 1+0 records out 512 bytes (512 B) copied, 0.00146441 s, 350 kB/s
So this is OVF_STORE disk, see bellow
2. I found information about metadata, outbox etc volumes, but I can not find info about lvm volumes with 128 MiB size. Are these any metadata volumes? ex: from lvscan: ACTIVE
'/dev/b41214a0-4748-47a8-85f2-9ad1e573ab10/57e904c5-3267-4d94-a52c-babb06912d90' [128.00 MiB] inherit' [128.00 MiB] inherit?
These are probably OVF_STORE volumes, used to keep vms ovs.
You can extract the data from these volumes like this:
lvchange -ay aed577ea-d1ca-4ebe-af80-f852c7ce59bb/dfbf69fc-3371-42d4-8298-415a6ad4244a
# tar tvf /dev/aed577ea-d1ca-4ebe-af80-f852c7ce59bb/dfbf69fc-3371-42d4-8298-415a6ad4244a -rw-r--r-- 0/0 138 2017-02-25 03:49 info.json -rw-r--r-- 0/0 11068 2017-02-25 03:49 55e347d5-4074-4408-b782-c43011483845.ovf -rw-r--r-- 0/0 10306 2017-02-25 03:49 bcb03d22-0799-4b0e-bcb3-f69954e6f5eb.ovf
# tar xvf /dev/aed577ea-d1ca-4ebe-af80-f852c7ce59bb/dfbf69fc-3371-42d4-8298-415a6ad4244a bcb03d22-0799-4b0e-bcb3-f69954e6f5eb.ovf bcb03d22-0799-4b0e-bcb3-f69954e6f5eb.ovf
# dd if=bcb03d22-0799-4b0e-bcb3-f69954e6f5eb.ovf bs=512 count=1 <?xml version="1.0" encoding="UTF-8"?><ovf:Envelope xmlns:ovf="http://schemas.dmtf.org/ovf/envelope/1/"
xmlns:rasd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_ResourceAllocationSett..."
xmlns:vssd="http://schemas.dmtf.org/wbem/wscim/1/cim-schema/2/CIM_VirtualSystemSettingDa..." xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ovf:version="4.1.0.0"><References><File
ovf:href="239d9e96-ad7d-4a7d-83af-d593877db11b/93331705-46be-4cb8-9dc2-c1559843fd4a" ovf:id="93331705-46be-4cb8-9dc2-c15598431+0 records in 1+0 records out 512 bytes (512 B) copied, 8.0163e-05 s, 6.4 MB/s
3. Are they removed? When, for example, the virtual machine or disk will be deleted ?
Yes, we create an lv when you create a disk or create snapshot, and remove them when you delete vm, disk, or snapshot.
Nir