As far as I understood, the chain is the same - admin extend volume by
using Cinder, but unlike earlier implementation, if volume is in-use,
Cinder will ask Nova whether Nova support extending attached volumes (by
checking Nova's API microversion) and if yes, will resize volume
informing Nova using "volume-extended" call. On Nova's side, it will
inform QEMU about this change... then either user can manually resize or
it will happen on next reboot.
I can be wrong, of course, but there is no neither "nova volume-extend"
nor word "extend" in "nova --help" :-)
On 9/26/17 5:35 PM, John Petrini wrote:
I think this feature is actually implemented in nova. So you have to
use the nova volume-extend option to do what you want. This is just my
interpretation of the release notes though. I haven't tried it.
On Tue, Sep 26, 2017 at 10:20 AM, Volodymyr Litovka <doka...@gmx.com
<mailto:doka...@gmx.com>> wrote:
Hi Jay,
I know about this way :-) but Pike introduced ability to resize
attached volumes:
"It is now possible to signal and perform an online volume size
change as of the 2.51 microversion using
the|volume-extended|external event. Nova will perform the volume
extension so the host can detect its new size. It will also resize
the device in QEMU so instance can detect the new disk size
without rebooting." --
https://docs.openstack.org/releasenotes/nova/pike.html
<https://docs.openstack.org/releasenotes/nova/pike.html>
On 9/26/17 5:04 PM, Jay Pipes wrote:
Detach the volume, then resize it, then re-attach.
Best,
-jay
On 09/26/2017 09:22 AM, Volodymyr Litovka wrote:
Colleagues,
can't find ways to resize attached volume. I'm on Pike.
As far as I understand, it required to be supported in Nova,
because Cinder need to check with Nova whether it's possible to
extend this volume.
Well,
- Nova's API microversion is 2.51, which seems to be enough to
support "volume-extended" API call
- Properties of image are *hw_disk_bus='scsi'* and
*hw_scsi_model='virtio-scsi'*, type bare/raw, located in Cinder
- hypervisor is KVM
- volume is bootable, mounted as root, created as snapshot from
Cinder volume
- Cinder's backend is CEPH/Bluestore
and both "cinder extend" and "openstack volume set --size"
returns "Volume status must be '{'status': 'available'}' to
extend, currently in-use".
I did not find any configuration options neither in nova nor in
cinder config files, which can help with this functionality.
What I'm doing wrong?
Thank you.
--
Volodymyr Litovka
"Vision without Execution is Hallucination." -- Thomas Edison
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"Vision without Execution is Hallucination." -- Thomas Edison
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