This situation can be caused by a lot of different things.

"gnocchi resource-type list" will show you the resource-types configured. Make sure you have configured the resource types that Ceilometer is pushing resources to
Make sure you have enabled metrics to be collected via polling.yml file
Make sure you have configured the "gnocchi_resources.yaml" file, and that the link between metrics, resources, and attributes to be pushed are correctly created
If want to generate metrics based on events, you then need to check : meters.yaml file, to see if everything is fine there
Make sure Ceilometer is pushing metrics and resource attributes to gnocchi. When the push is executed you will see the following DEBUG log messages:

Processing sample [%s] for resource ID [%s]
%d measures posted against %d metrics through %d resources
metric %s is not handled by Gnocchi (this one will appear if the metric is not configured to be pushed in the "gnocchi_resources.yaml")

On Thu, Mar 3, 2022 at 6:33 AM Molka Gharbaoui <Molka.Gharbaoui@santannapisa.it> wrote:

Thank you Matthias for your reply.

Unfortunately, from the logs I still cannot understand what is the issue.

Could someone kindly indicate me how ceilometer and gnocchi should be configured to get the data?

For example in this link: https://docs.openstack.org/ceilometer/latest/install/install-base-ubuntu.html the endpoints should use the following URL: http://controller:8041 while in my case the 8041 port is not even listening and the API indicated in the dashboard for Gnocchi is http://x.x.x.x/metric.

Thank you in advance.

Da: Matthias Runge <mrunge@matthias-runge.de>
Inviato: lunedì 28 febbraio 2022 19:37
A: openstack-discuss@lists.openstack.org <openstack-discuss@lists.openstack.org>
Oggetto: Re: [Devstack][Gnocchi][Ceilometer] Not able to retrieve metrics using ceilometer and gnocchi

On 2/28/22 17:58, Molka Gharbaoui wrote:
> Hi all,
>
> I installed devstack and ceilometer by adding the following lines in the
> local.conf file:
>
> enable_plugin ceilometer https://opendev.org/openstack/ceilometer.git
> CEILOMETER_BACKEND=gnocchi
>
> Devstack (yoga) works correctly (I am able to create images, instances,
> etc.). The problem is that I cannot visualize the metrics. Using
> "gnocchi metric list" and "gnocchi resource list" commands the result is
> empty.
>
> When I use the "--debug" option, no errors are plotted but the body
> response is empty.
>
> "ceilometer-upgrade" gives the following error: DEBUG
> ceilometer.cmd.storage Upgrade Gnocchi resource types upgrade
> /opt/stack/ceilometer/ceilometer/cmd/storage.py:42
>
> "ceilometer-polling" prints "The resource could not be found".
>
> I have a running instance.
>
> Could you help me in retrieving the metrics from openstack?

That means, that ceilometer apparently either doesn't get any updates
from the underlying services OR it doesn't send the metrics over to gnocchi.

You should check the ceilometer logs for errors. Also gnocchi logs could
reveal issues.

Matthias

Rafael Weingärtner