Prometheus Exporter

A simple prometheus exporter library using:

• aiohttp
• zenlib

Features

• async via aiohttp
• detailed logging
• toml config
• optional caching

Components

Labels

The Labels dict represents a collection of labels and ensures added labels are strings.

The __str__ method is overridden so that when printed, the object returns a formatted label string for exporting.

copy() ensures the copy is also a Labels type, and has a logger from the same parent.

Metric

The Metric class represents a prometheus metric.

It must be defined with a name, and defaults to the value 0.

Optionally the following parameters can be passed:

• metric_type (untyped) Prometheus metric type
• help (None) The metric help string
• labels (Labels()) Label dictionary for the metric.

check_filter(label_filter) can be used to pass a label filter to the metric, returning True if the labels match.

__str__ is overridden to print out a proper metric string based on the contents of the object.

Exporter

The Exporter is responsible for collecting and exporting metrics.

The following arguments can be used:

• config_file (config.toml) The config file for the exporter.
• labels (Labels()) Label dictionary for the exporter, passed to created metrics.
• listen_ip (127.0.0.1) The IP address to run the exporter on.
• listen_port (9999) The port to listen on.

Once created the exporter can be started with: start()

Requests to /metrics are handled by handle_metrics(request).