hello on openstack with ceph backend is it possible to live resize instances ? I want to change flavor without any down time .
Hi,
I don't know of any way to resize an instance without downtime. The docs [1] confirm this, they state:
You can change the size of an instance by changing its flavor. This rebuilds the instance and therefore results in a restart.
[1] https://docs.openstack.org/nova/xena/user/resize.html
Zitat von Parsa Aminian p.aminian.server@gmail.com:
hello on openstack with ceph backend is it possible to live resize instances ? I want to change flavor without any down time .
Do you mean increase the size of the disk volume?
It is possible to increase volume sizes live with ceph storage.
On 24/05/2022 19:19, Parsa Aminian wrote:
hello on openstack with ceph backend is it possible to live resize instances ? I want to change flavor without any down time .
On Wed, 2022-05-25 at 14:32 +0100, Jonathan Rosser wrote:
Do you mean increase the size of the disk volume?
no i think they mean change the flavor to increase or decrease the cpu/ram
this type of virtial vm scaling has been requested in the past but it really non tivial to implement so we have never approved a spec to add support to this to nova.
if they are refering to voluem resize that should be possibel live if you are using cinder and not novas built in rbd support.
It is possible to increase volume sizes live with ceph storage.
On 24/05/2022 19:19, Parsa Aminian wrote:
hello on openstack with ceph backend is it possible to live resize instances ? I want to change flavor without any down time .
Hello. It looks like no way at this time.
On Wed, Mar 15, 2023, 7:05 PM Sean Mooney smooney@redhat.com wrote:
On Tue, 2022-05-24 at 22:49 +0430, Parsa Aminian wrote:
hello on openstack with ceph backend is it possible to live resize instances ?
I
want to change flavor without any down time .
no that is not support in nova with any storage backend or hypervior.
On Wed, 2023-03-15 at 19:10 +0700, Nguyễn Hữu Khôi wrote:
Hello. It looks like no way at this time.
correct live reisze is not supproted and not planned to be supported in a future release.
you can extend the disk live if its a boot form voluem instance but nova resize api is and will continue to be an offline operatoion. live resize wiht qemu/kvm has a lot of edge cases like startign the domain with the maxium ram set to the largeset value you might resize too and setting current to what is in the flavor. the same would be required for cpu. its really not something that is compatible with how we do flavor as there are too many ways that it could fail without signifciatly modifying how flavors work.
On Wed, Mar 15, 2023, 7:05 PM Sean Mooney smooney@redhat.com wrote:
On Tue, 2022-05-24 at 22:49 +0430, Parsa Aminian wrote:
hello on openstack with ceph backend is it possible to live resize instances ?
I
want to change flavor without any down time .
no that is not support in nova with any storage backend or hypervior.
participants (5)
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Eugen Block
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Jonathan Rosser
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Nguyễn Hữu Khôi
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Parsa Aminian
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Sean Mooney