[ovirt-users] Failed to activate Storage Domain --- ovirt 4.2

2019-06-07 Thread aminur . rahman
Hi 
Has anyone experiencing the following issue with Storage Domain -

Failed to activate Storage Domain cLUN-R940-DC2-dstore01 -- 
VDSM command ActivateStorageDomainVDS failed: Storage domain does not exist: 
(u'1b0ef853-fd71-45ea-8165-cc6047a267bc',)

Currently, the storge Domain is Inactive and strangely, the VMs are running as 
normal. We can't manage or extend the volume size of this storage domain. The 
pvscan shows as:
[root@uk1-ion-ovm-18  pvscan
  /dev/mapper/36000d31005697814: Checksum error at offset 
4397954425856
  Couldn't read volume group metadata from 
/dev/mapper/36000d31005697814.
  Metadata location on /dev/mapper/36000d31005697814 at 
4397954425856 has invalid summary for VG.
  Failed to read metadata summary from 
/dev/mapper/36000d31005697814
  Failed to scan VG from /dev/mapper/36000d31005697814

I have tired the following steps:
1. Restarted ovirt-engine.service
2. tried to restore the metadata using vgcfgrestore but it failed with the 
following error:

[root@uk1-ion-ovm-19 backup]# vgcfgrestore 36000d31005697814
  Volume group 36000d31005697814 has active volume: .
  WARNING: Found 1 active volume(s) in volume group 
"36000d31005697814".
  Restoring VG with active LVs, may cause mismatch with its metadata.
Do you really want to proceed with restore of volume group 
"36000d31005697814", while 1 volume(s) are active? [y/n]: y
  /dev/mapper/36000d31005697814: Checksum error at offset 
4397954425856
  Couldn't read volume group metadata from 
/dev/mapper/36000d31005697814.
  Metadata location on /dev/mapper/36000d31005697814 at 
4397954425856 has invalid summary for VG.
  Failed to read metadata summary from 
/dev/mapper/36000d31005697814
  Failed to scan VG from /dev/mapper/36000d31005697814
  /etc/lvm/backup/36000d31005697814: stat failed: No such file 
or directory
  Couldn't read volume group metadata from file.
  Failed to read VG 36000d31005697814 from 
/etc/lvm/backup/36000d31005697814
  Restore failed.

Please let me know if anyone knows any possible resolution. 

-AMinur
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[ovirt-users] Re: Failed to activate Storage Domain --- ovirt 4.2

2019-06-07 Thread aminur . rahman
The Storage Domain was the master domain and it ran out space. 
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[ovirt-users] Re: Failed to activate Storage Domain --- ovirt 4.2

2019-06-11 Thread Aminur Rahman
Hi Nir

Yes, the metadata was corrupted but the VMs were running OK. This master 
storage domain has increased its allocation significantly overnight and ran out 
the space limit and went to offline completely. The cluster was online and VMs 
were running OK but the affected Storage Domain went offline. I tired increase 
the storage domain but the Ovirt wasn’t allowing to expend the storage.

Due to time constrain, I had restore the storage domain using Compellent 
snapshot. However, we need to prevent this happening again when Master storage 
Domain fill-up with the space. Currently, we have the following parameter set 
in the 5TB storage Domain.

ID: 0e1f2a5d-a548-476c-94bd-3ab3fe239926
Size: 5119 GiB
Available: 2361 GiB
Used: 2758 GiB
Allocated: 3104 GiB
Over Allocation Ratio: 14%
Images: 13
Warning Low Space Indicator: 10% (511 GiB)
Critical Space Action Blocker: 5 GiB

Please kindly advise what action needs to implement, so we can prevent this 
occurs again in the future.

Thanks
Aminur Rahman
aminur.rah...@iongroup.com<mailto:aminur.rah...@iongroup.com>
t
+44 20 7398 0243
m
+44 7825 780697
iongroup.com<https://www.iongroup.com>

From: Nir Soffer 
Sent: 10 June 2019 22:07
To: David Teigland 
Cc: Aminur Rahman ; users 
Subject: Re: [ovirt-users] Failed to activate Storage Domain --- ovirt 4.2

On Mon, Jun 10, 2019 at 11:22 PM David Teigland 
mailto:teigl...@redhat.com>> wrote:
On Mon, Jun 10, 2019 at 10:59:43PM +0300, Nir Soffer wrote:
> > [root@uk1-ion-ovm-18  pvscan
> >   /dev/mapper/36000d31005697814: Checksum error at offset
> > 4397954425856
> >   Couldn't read volume group metadata from
> > /dev/mapper/36000d31005697814.
> >   Metadata location on /dev/mapper/36000d31005697814 at
> > 4397954425856 has invalid summary for VG.
> >   Failed to read metadata summary from
> > /dev/mapper/36000d31005697814
> >   Failed to scan VG from /dev/mapper/36000d31005697814
>
> This looks like corrupted vg metadata.

Yes, the second metadata area, at the end of the device is corrupted; the
first metadata area is probably ok.  That version of lvm is not able to
continue by just using the one good copy.

Can we copy the first metadata area into the second metadata area?

Last week I pushed out major changes to LVM upstream to be able to handle
and repair most of these cases.  So, one option is to build lvm from the
upstream master branch, and check if that can read and repair this
metadata.

This sound pretty risky for production.

> David, we keep 2 metadata copies on the first PV. Can we use one of the
> copies on the PV to restore the metadata to the least good state?

pvcreate with --restorefile and --uuid, and with the right backup metadata

What would be the right backup metadata?

could probably correct things, but experiment with some temporary PVs
first.

Aminur, can you copy and compress the metadata areas, and shared them somewhere?

To copy the first metadata area, use:

dd if=/dev/mapper/360014058ccaab4857eb40f393aaf0351 of=md1 bs=128M count=1 
skip=4096 iflag=skip_bytes

To copy the second metadata area, you need to know the size of the PV. On my 
setup with 100G
PV, I have 800 extents (128M each), and this works:

dd if=/dev/mapper/360014058ccaab4857eb40f393aaf0351 of=md2 bs=128M count=1 
skip=799

gzip md1 md2

Nir
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[ovirt-users] Windows 2016 guest auto shutdown

2019-02-12 Thread aminur . rahman
I am using ovirt hosted engine 4.2 to manage 5 nodes cluster and Dell 
Compellent storage domain using ISCSI. The guest is running Windows 2016 OS 
with ovirt 4.2.4 guest tools installed. The guest presented 1.4 TB thin 
provision disks and very often, the VM goes offline while doing big file 
transfer. I didn't find any event errors on OS level. I am wondering if anyone 
has experienced this issue.

Thanks
-Aminur
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[ovirt-users] Re: Windows 2016 guest auto shutdown

2019-02-13 Thread Aminur Rahman
The VM guest has a single network port and the host has multiple ports for 
managements, ISCSI and it can’t be run everything on a single network as 20 
more guests are running on the same host.

Aminur Rahman

aminur.rah...@iongroup.com<mailto:aminur.rah...@iongroup.com>

t

+44 20 7398 0243

m

+44 7825 780697

iongroup.com<https://www.iongroup.com>



From: Hetz Ben Hamo 
Sent: 12 February 2019 14:12
To: Aminur Rahman 
Cc: users@oVirt.org
Subject: Re: [ovirt-users] Windows 2016 guest auto shutdown

Are you by any chance run everything (management, iSCSI etc) - on a single 
physical network port?


On Tue, Feb 12, 2019 at 4:10 PM 
mailto:aminur.rah...@iongroup.com>> wrote:
I am using ovirt hosted engine 4.2 to manage 5 nodes cluster and Dell 
Compellent storage domain using ISCSI. The guest is running Windows 2016 OS 
with ovirt 4.2.4 guest tools installed. The guest presented 1.4 TB thin 
provision disks and very often, the VM goes offline while doing big file 
transfer. I didn't find any event errors on OS level. I am wondering if anyone 
has experienced this issue.

Thanks
-Aminur
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[ovirt-users] After attaching the Storage domain, the VMs are disappeared from the VM import

2022-04-11 Thread aminur . rahman
Hi,
We're noticing some weird issue while re-attaching the storage domain. After 
re-attach the storage domain, some VMs are completely missing from the VM 
Import. Before detaching the storage domain, all the VMs were shutdown 
gracefully. 

I also noticed some disks are exists with no Alias under the disk import on the 
storage domain and I can't import those disks. Its failed to register the disk 
with  error. 

We're using Ovirt 4.2 with multiple Dell hosts in the cluster and Compellent 
SAN with iSCSI volumes. 

Please kindly advise if I am missing anything before detach the storage domain.

Thanks
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