I left the instance running for more than 1 hour and now when I check the logs of "ceilometer-polling" I can see the following messages: DEBUG ceilometer.compute.pollsters [-] 3ef0373a-558c-4818-b693-7536ee70d283/network.outgoing.bytes volume: 3608 _stats_to_sample /opt/stack/ceilometer/ceilometer/compute/pollsters/__init__.py:108 DEBUG ceilometer.compute.pollsters [-] 3ef0373a-558c-4818-b693-7536ee70d283/network.outgoing.packets volume: 25 _stats_to_sample /opt/stack/ceilometer/ceilometer/compute/pollsters/__init__.py:108 DEBUG ceilometer.compute.pollsters [-] 3ef0373a-558c-4818-b693-7536ee70d283/disk.device.write.requests volume: 4568 _stats_to_sample /opt/stack/ceilometer/ceilometer/compute/pollsters/__init__.py:108 So I guess that Ceilometer is starting to poll some statistics. The "gnocchi resource list" also now gives the following output: ID Type 3ef0373a-558c-4818-b693-7536ee70d283 | instance However, the "gnocchi metric list" is still empty. Looking in the logs of "ceilometer-agent-notification", I found the following error: ERROR ceilometer.pipeline.sample [-] Pipeline meter_sink: Continue after error from publisher <ceilometer.publisher.gnocchi.GnocchiPublisher object at 0x7fc9800f9ee0>: gnocchiclient.exceptions.Conflict: <html> <head> <title>409 Conflict</title> </head> <body> <h1>409 Conflict</h1> There was a conflict when trying to complete your request.<br /><br /> Archive policy ceilometer-low already exists </body> </html> (HTTP 409) Do you know how to resolve this? Thanks.