[ovirt-users] Re: How to delete leftover of a failed live storage migration disk

On Fri, May 11, 2018 at 2:59 PM Gianluca Cecchi <gianluca.cecchi(a)gmail.com&gt; wrote: > Hello, > I had an error during live storage migration of a disk. > The destination image was created but the process was not completed, > because of a bug in the original version of sw. > sw?

> Then I updated sw but if I try to run again the move of the same disk to > the same destination storage domain I get > > VDSM command HSMGetAllTasksStatusesVDS failed: Cannot create Logical > Volume: ('679c0725-75fb-4af7-bff1-7c447c5d789c', > 'd2a89b5e-7d62-4695-96d8-b762ce52b379') > This engine log is not very useful. We need complete vdsm log to understand what happened. > On destination storage domain, that is empty, from web admin gui I see > only the 2 OVF_STORE disks. > From OS point of view using lvs I see the leftover LV that oVirt > complains not able to create (I suppose because already existent due to the > former error) > > # lvs 679c0725-75fb-4af7-bff1-7c447c5d789c/d2a89b5e-7d62- > 4695-96d8-b762ce52b379 > LV VG > Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert > d2a89b5e-7d62-4695-96d8-b762ce52b379 679c0725-75fb-4af7-bff1-7c447c5d789c > -wi------- 55.00g > Using lvs -o+tags will give more useful info on this lv, like the image uuid and state of the lv. > I know that I should use the "vdsClient -s 0 deleteVolume " command from > the SPM host. > > the syntax should be > # vdsClient -s 0 deleteVolume --help > Error using command: list index out of range > > deleteVolume > <sdUUID> <spUUID> <imgUUID> <volUUID>,...,<volUUID> <postZero> [<force>] > Deletes an volume if its a leaf. Else returns error > This is old tool that was deleted long time ago. If you are using 4.1 or later, you can use vdsm-client which is better documented and supported. > I have difficulties to do the exact mapping of the various elements. > Is it right what below? > > sdUUID --> VG name > > spUUID I can retrieve using: > > # vdsClient -s 0 getStorageDomainInfo 679c0725-75fb-4af7-bff1- > 7c447c5d789c > uuid = 679c0725-75fb-4af7-bff1-7c447c5d789c > type = ISCSI > vguuid = nkoZA2-nQOu-oeXX-Phpa-moqh-FWuR-AFAh4B > metadataDevice = 36589cfc0000006dd999f5618bf759d3f > state = OK > version = 4 > role = Master > vgMetadataDevice = 36589cfc0000006dd999f5618bf759d3f > class = Data > pool = ['5af30d59-004c-02f2-01c9-0000000000b8'] > name = ISCSI_400G > > so spUUID is the pool --> 5af30d59-004c-02f2-01c9-0000000000b8 in my > case ? > > for imgUUID I don't know a command to retrieve. > in my case the target storage domain (ISCSI_400G) in this moment is the > master one and I can see it under /rhev/data-center/mnt/blockSD/ > and so I find > > # ll /rhev/data-center/mnt/blockSD/679c0725-75fb-4af7-bff1- > 7c447c5d789c/images/ > total 4 > drwxr-xr-x. 2 vdsm kvm 4096 May 10 15:39 530b3e7f-4ce4-4051-9cac- > 1112f5f9e8b5 > > So it seems to me in my case imgUUID is 530b3e7f-4ce4-4051-9cac- > 1112f5f9e8b5 > > But even if it is right in my particular case, how can I get in general? > The image uuid is in the lv tag. If you use: lvs -o vg_name,lv_name,tags You will find it as IU_<image-uuid> volUUID ? Is it the LV name corresponding, so in my case > d2a89b5e-7d62-4695-96d8-b762ce52b379 ? > > The result of the vdsCLient command should be the removal of LV also? > Probably, but note that vdsClient (and vdsm-client) are not supported API. Do you see this disk on engine side? it should be aware of this disk since it created the disk during live storage migration. Also, we should not have leftovers volumes after failed operations. Please file a bug for this and attach both engine.log and vdsm.log on the host doing the live storage migration. Nir