1 - Clone the repository in the machine where ironic is installed.

$ git clone https://github.com/metal3-io/ironic-prometheus-exporter

2 - Install the driver (may require sudo permisions)

$ cd ironic-prometheus-exporter
$ python setup.py install

3- Verify if the driver is installed

$ pip install entry_point_inspector --user <user>
$ epi group show oslo.messaging.notify.drivers

Output in case of a successful instalation: prometheus_exporter is listed in the Name column and the Error column should be empty. Output in case of an unsuccessful instalation: prometheus_exporter is listed in the Name column and the Error column will have more information.

After install the driver you will need to update the ironic.conf and add the below information.

[conductor]
send_sensor_data=true

[oslo_messaging_notifications]
driver = prometheus_exporter
transport_url = fake://
location=/tmp/ironic_prometheus_exporter

The Flask Application is responsible to merge all the metrics files present in the directory set in [oslo_messaging_notifications]/location.

NOTE: if you want to deploy in production please check the Flask documentation

To run the Flask Application follow the steps listed below: 1 - open the repository directory

$ cd ironic-prometheus-exporter/

2- set the FLASK_* environment variables and the location of the ironic.conf file.

$ export IRONIC_CONFIG=/etc/ironic/ironic.conf
$ export FLASK_APP=ironic_prometheus_exporter/app/exporter.py
$ export FLASK_RUN_HOST=$HOST_IP
$ export FLASK_RUN_PORT=5000

3- run the Flask Application

$ python -m flask run &

Running under uWSGI Reproduce the Steps 1 and 2 (You don't need to set FLASK_APP variable) and run the command below:

$ uwsgi --socket $FLASK_RUN_HOST:$FLASK_RUN_PORT --protocol=http -w ironic_prometheus_exporter.app.wsgi