Open Stack

On Tue, 2021-02-16 at 22:32 +0100, Christian Rohmann wrote:
> Hello Lee,
> 
> thanks for quick response and sorry about the late reaction from my side.
> 
> 
> 
> On 15/02/2021 12:18, Lee Yarwood wrote:
> > On 15-02-21 00:52:52, Christian Rohmann wrote:
> > > So I was simply wondering if this is expected to be working?
> > > Are there any special settings / options I need to set to enable this
> > > feature?
> > Yes this should work without any additonal changes, can you write up
> > a nova bug with the following output in addition to the bug template:
> > 
> > - Your versions of libvirt and QEMU.
> > 
> > - Output of the following command *after* requesting a resize:
> > 
> > $ virsh domblkinfo $instance_uuid $target_dev
> > 
> > - Output of the following commands once confirmed the resize didn't
> >    happen within the domain:
> > 
> > $ virsh blockresize $instance_uuid $rbd_path $new_size
> > $ virsh domblkinfo $instance_uuid $target_dev
> > 
> >  From what you've said above this smells like a libvirt/QEMU bug but I
> > don't have a rbd env to hand to confirm things at the moment.
> > 
> > Cheers,
> > 
> 
> I have just been trying to reproduce the issue, but in all my new 
> attempts it just worked as expected:
> 
> > [162262.926512] sd 0:0:0:1: Capacity data has changed
> > [162262.932868] sd 0:0:0:1: [sdb] 6291456 512-byte logical blocks: 
> > (3.22 GB/3.00 GiB)
> > [162262.933061] sdb: detected capacity change from 2147483648 to 
> > 3221225472
> 
> 
> Sorry about the noise then.
> 
> The only "bugs" to report are the usability issues of Horizon not 
> offering "in-use" extension of volume as far as I can see and the
> pending support in the openstack cli 
> (https://bugs.launchpad.net/cinder/+bug/1871759).

i have done a live extend using cinder client before.

sean at p50:~$ cinder --help extend
usage: cinder extend <volume> <new_size>

Attempts to extend size of an existing volume.

Positional Arguments:
  <volume>    Name or ID of volume to extend.
  <new_size>  New size of volume, in GiBs.


so it does work provided you have not used the nova workaround config options for host mounting
the rbd volumens.
https://docs.openstack.org/nova/latest/configuration/config.html#workarounds.rbd_volume_local_attach
that will go away shortly proably in the xena release but if you enable that you can resize volumnes that
are in use.

so ya i think the only bugs are really not bugs but RFEs
openstack client does not have parity with cinder client and nor does horizon.
a lack of feature in the latter too is not really a bug just no one has implmented it yet so there is a gap.

from the api side and a nova persoection i think it should work you just need to use a clint that supprot it.

> 
> 
> 
> Thanks again,
> Regards
> 
> 
> Christian
> 
> 
> 
> 
>