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Ignazio, Radoslaw, 

thanks to you, I made some modifications and my environment seems to work better (the images are placed on the iiscsi bay on which the volumes are stored).
I installed the cache for glance. It works, well I think it does.

My question is: between the different formats (qcow2, raw or other), which is the most efficient if
- we create a volume then an instance from the volume
- we create an instance from the image
- we create an instance without volume
- we create a snapshot then an instance from the snapshot

Franck


> 
> 
>> Le 19 nov. 2021 à 14:50, Ignazio Cassano <ignaziocassano at gmail.com <mailto:ignaziocassano at gmail.com>> a écrit :
>> 
>> Franck, this help you a lot.
>> Thanks Radoslaw
>> Ignazio
>> 
>> Il giorno ven 19 nov 2021 alle ore 12:03 Radosław Piliszek <radoslaw.piliszek at gmail.com <mailto:radoslaw.piliszek at gmail.com>> ha scritto:
>> If one sets glance_file_datadir_volume to non-default, then glance-api
>> gets deployed on all hosts.
>> 
>> -yoctozepto
>> 
>> On Fri, 19 Nov 2021 at 10:51, Ignazio Cassano <ignaziocassano at gmail.com <mailto:ignaziocassano at gmail.com>> wrote:
>> >
>> > Hello Franck, glance is not deployed on all nodes at default.
>> > I got the same problem
>> > In my case I have 3 controllers.
>> > I created an nfs share on a storage server where to store images.
>> > Before deploying glance, I create /var/lib/glance/images on the 3 controllers and I mount the nfs share.
>> > This is my fstab on the 3 controllers:
>> >
>> > 10.102.189.182:/netappopenstacktst2_glance /var/lib/glance nfs  rw,user=glance,soft,intr,noatime,nodiratime
>> >
>> > In my globals.yml I have:
>> > glance_file_datadir_volume: "/var/lib/glance"
>> > glance_backend_file: "yes"
>> >
>> > This means images are on /var/lib/glance and since it is a nfs share all my 3 controlles can share images.
>> > Then you must deploy.
>> > To be sure the glance container is started on all controllers, since I have 3 controllers, I deployed 3 times changing the order in the inventory.
>> > First time:
>> > [control]
>> > A
>> > B
>> > C
>> >
>> > Second time:
>> > [control]
>> > B
>> > C
>> > A
>> >
>> > Third time:
>> > [control]
>> > C
>> > B
>> > A
>> >
>> > Or you can deploy glance 3 times using -t glance and -l <controllername>
>> >
>> > As far as the instance  stopped, I got I bug with a version of kolla.
>> > https://bugs.launchpad.net/kolla-ansible/+bug/1941706 <https://bugs.launchpad.net/kolla-ansible/+bug/1941706>
>> > Now is corrected and with kolla 12.2.0 it works.
>> > Ignazio
>> >
>> >
>> > Il giorno mer 17 nov 2021 alle ore 23:17 Franck VEDEL <franck.vedel at univ-grenoble-alpes.fr <mailto:franck.vedel at univ-grenoble-alpes.fr>> ha scritto:

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