arista-eapi-exporter

This is a Prometheus Exporter for extracting metrics from an Arista Switch using the Arista's eAPI and the Python Client for eAPI pyeapi.

The current implementation retrieves the memory usage data via show hardware capacity command and returns the table rows as a Gauge metric using some of the switches information as labels like the serial, the model, the firmware version and the hostname (arista_tcam). It also returns a metric (arista_up) indicating if the switch was reachable or not and one returning the response time of the show version call (arista_response).

Future implementations could easily also gather other data from the switches.

The hostname of the switch has to be passed as target parameter in the http call.

Example Call

if you are logged in to the POD running the exporter you can call

curl http://localhost:9200/arista?target=eu-de-1-asw202-bm001.cc.eu-de-1.cloud.sap

Prerequisites and Installation

The exporter was written for Python 3.6 or newer. To install all modules needed you have to run the following command:

pip3 install --no-cache-dir -r requirements.txt

There is also a docker file available to create a docker container to run the exporter.

The config.yml file

• The listen_port is providing the port on which the exporter is waiting to receive calls.

• The credentials for login to the switches can either be added to the config.yaml file or passed via environment variables ARISTA_USERNAME and ARISTA_PASSWORD. The environment overwrites the settings in the config file.

• The loglevel can be specified in the config file. If omitted the default level is INFO.

• The timeout parameter specifies the amount of time to wait for an answer from the switch. It can be defined in config.yaml ir passed via environment variable TIMEOUT. The environment overwrites the settings in the config file.

• With the exclude parameter you can filter the output of the exporter. In the following example some of the tables are excluded.

• The job parameter specifies the Prometheus job that will be passed as label.

Example of a config file

listen_port: 9200
username: <your username>
password: <your password>
loglevel: <INFO|DEBUG>
timeout: 20
exclude: ['NextHop', 'LPM', 'Host', 'MAC', 'VFP']
job: arista