6:39 a.m.
Hi All,
I extended a VM disk via oVirt Manager (4.4.8) without error, but when I checked the VM
(fdisk & lsblk) the size has not changed.
Any help as always would be appreciated.
Kind Regards
Simon...
7:02 a.m.
Once upon a time, simon(a)justconnect.ie <simon(a)justconnect.ie> said:
I extended a VM disk via oVirt Manager (4.4.8) without error, but
when I checked the VM (fdisk & lsblk) the size has not changed.
Any help as always would be appreciated.
What is the OS running in the VM, and what type of disk is it (virtio,
virtio-scsi, IDE)? Newer Linux versions should see a virtio/virtio-scsi
disk size change immediately. Some older versions had ways to trigger a
rescan to see the size change, while some required a reboot.
--
Chris Adams <cma(a)cmadams.net>
7:18 a.m.
Hi,
On Fri, February 25, 2022 9:10 am, simon(a)justconnect.ie wrote:
CentOS 7 - VirtIO_SCSI
Disk is pre-allocated and is the OS disk.
Did you try rebooting?
-derek
--
Derek Atkins 617-623-3745
derek(a)ihtfp.com www.ihtfp.com
Computer and Internet Security Consultant
7:32 a.m.
In a production environment that is not possible until next week.
I have increased disks of live VMs before without any issue so don't understand why
the backend shows an increase but is not visible on the VM.
7:56 a.m.
Once upon a time, simon(a)justconnect.ie <simon(a)justconnect.ie> said:
CentOS 7 - VirtIO_SCSI
Disk is pre-allocated and is the OS disk.
Is it reasonbly up-to-date? I think early releases of CentOS 7 wouldn't
see a change "live".
Since it is virtio-scsi, you can try forcing the kernel to re-check it.
For device "sda", do:
echo 1 > /sys/block/sda/device/rescan
This is non-interrupting and should be safe to do on a live system.
--
Chris Adams <cma(a)cmadams.net>
9:42 a.m.
Manual rescan the SCSI bus, for each <hostX>
echo "- - -" > /sys/class/scsi_host/<hostX>/scan
Regards
Angus
________________________________
From: simon(a)justconnect.ie <simon(a)justconnect.ie>
Sent: Friday, February 25, 2022 3:32:01 PM
To: users(a)ovirt.org <users(a)ovirt.org>
Subject: [ovirt-users] Re: VM Disk extend not reflected in VM oS
In a production environment that is not possible until next week.
I have increased disks of live VMs before without any issue so don't understand why
the backend shows an increase but is not visible on the VM.
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4:09 a.m.
Thanks All,
Rescans and reboot didn't resolve this - disk size increase still not seen by OS.
Any other suggestions?
Regards
Simon...
8:29 a.m.
Can you summarize how you expanded the disk,what you see in UI and the output of
'lsblk' (in the guest )?
Best Regards,Strahil Nikolov
Thanks All,
Rescans and reboot didn't resolve this - disk size increase still not seen by OS.
Any other suggestions?
Regards
Simon...
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1:30 p.m.
Hi Strahil,
Clicked edit on the VMs disk and then entered the required size to extend the disk in
"Extend size by (GiB)" window.
The UI showed the correct size of the disk but lsblk on the Guest failed to show any
changes.
10:57 p.m.
Can you provide the lsblk output ?Most probably changing the size outside of oVirt might
cause huge issues, but I think you can try to do a storage migration (if you have a second
Datastore) and then expand.
Best Regards,Strahil Nikolov
On Tue, Mar 8, 2022 at 22:31, simon@justconnect.ie<simon(a)justconnect.ie> wrote:
Hi Strahil,
Clicked edit on the VMs disk and then entered the required size to extend the disk in
"Extend size by (GiB)" window.
The UI showed the correct size of the disk but lsblk on the Guest failed to show any
changes.
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10:13 a.m.
Hi Strahil,
Apologies for the delay.
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 100G 0 disk
`-sda1 8:1 0 100G 0 part
|-vg00-root 253:4 0 99G 0 lvm /
`-vg00-swap_1 253:5 0 980M 0 lvm [SWAP]
sdb 8:16 0 100G 0 disk
`-sdb1 8:17 0 100G 0 part
|-vg_02-lv_nfs-real 253:0 0 95G 0 lvm
| |-vg_02-lv_nfs 253:1 0 95G 0 lvm /nfs
| `-vg_02-lv_nfs_snap 253:3 0 95G 0 lvm
`-vg_02-lv_nfs_snap-cow 253:2 0 1G 0 lvm
`-vg_02-lv_nfs_snap 253:3 0 95G 0 lvm
sr0 11:0 1 1024M 0 rom
We have tried all manner of rescans (
https://serverfault.com/questions/306737/how-do-i-get-centos-vm-to-re-rea...
) but nothing shows the additional space allocated.
Regards
Simon
572
days inactive
801
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11 comments
5 participants
participants (5)
-
Angus Clarke -
Chris Adams -
Derek Atkins -
simon＠justconnect.ie -
Strahil Nikolov