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ok ... I got it ... and I think I was doing things wrong.
Okay, so I have another question.
My cinder storage is on an iscsi bay.
I have 3 servers, S1, S2, S2.
Compute is on S1, S2, S3.
Controller is on S1 and S2.
Storage is on S3.
I have Glance on S1. Building an instance from an image is too long, so you have to make a volume first.
If I put the images on the iSCSI bay, I mount a directory in the S1 file system, will the images build faster? Much faster ?
Is this a good idea or not?

Thank you again for your help and your experience


Franck 

> Le 18 nov. 2021 à 07:23, Ignazio Cassano <ignaziocassano at gmail.com> a écrit :
> 
> Hello, i solved using the following variabile in globals.yml:
> glance_file_datadir_volume=somedir
> and glance_backend_file="yes'
> 
> So if the somedir is a nfs mount point, controllers can share images. Remember you have to deploy glance on all controllers.
> Ignazio
> 
> Il Mer 17 Nov 2021, 23:17 Franck VEDEL <franck.vedel at univ-grenoble-alpes.fr <mailto:franck.vedel at univ-grenoble-alpes.fr>> ha scritto:
> Hello and thank you for the help.
> I was able to move forward on my problem, without finding a satisfactory solution.
> Normally, I have 2 servers with the role [glance] but I noticed that all my images were on the first server (in / var / lib / docker / volumes / glance / _data / images) before the reconfigure, none on the second. But since the reconfiguration, the images are placed on the second, and no longer on the first. I do not understand why. I haven't changed anything to the multinode file.
> so, to get out of this situation quickly as I need this openstack for the students, I modified the multinode file and put only one server in [glance] (I put server 1, the one that had the images before reconfigure), I did a reconfigure -t glance and now I have my images usable for instances.
> I don't understand what happened. There is something wrong.
> 
> Is it normal that after updating the certificates, all instances are turned off?
> thanks again
> 
> Franck
> 
>> Le 17 nov. 2021 à 21:11, Cyril Roelandt <cyril at redhat.com <mailto:cyril at redhat.com>> a écrit :
>> 
>> Hello,
>> 
>> 
>> On 2021-11-17 08:59, Franck VEDEL wrote:
>>> Hello everyone 
>>> 
>>> I have a strange problem and I haven't found the solution yet. 
>>> Following a certificate update I had to do a "kolla-ansible -t multinode reconfigure ». 
>>> Well, after several attempts (it is not easy to use certificates with Kolla-ansible, and from my advice, not documented enough for beginners), I have my new functional certificates. Perfect ... well almost.
>>> 
>>> I am trying to create a new instance to check general operation. ERROR. 
>>> Okay, I look in the logs and I see that Cinder is having problems creating volumes with an error that I never had ("TypeError: 'NoneType' object is not iterable).
>> 
>> We'd like to see the logs as well, especially the stacktrace.
>> 
>>> I dig and then I wonder if it is not the Glance images which cannot be used, while they are present (openstack image list is OK). 
>>> 
>>> I create an empty volume: it works.
>>> I am creating a volume from an image: Failed. 
>> 
>> What commands are you running? What's the output? What's in the logs?
>> 
>>> 
>>> However, I have my list of ten images in glance. 
>>> 
>>> I create a new image and create a volume with this new image: it works. 
>>> I create an instance with this new image: OK. 
>>> 
>>> What is the problem ? The images present before the "reconfigure" are listed, visible in horizon for example, but unusable. 
>>> Is there a way to fix this, or do we have to reinstall them all? 
>> 
>> What's your configuration? What version of OpenStack are you running?
>> 
>> 
>> 
>> Cyril
>> 
> 

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