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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

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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>
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-- 
Volodymyr Litovka
   "Vision without Execution is Hallucination." -- Thomas Edison

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