routemaster-prometheus 1.5.0

Prometheus metrics reporting for Routemaster.

Usage, in your Routemaster configuration file:

plugins:
  logging:
    - class: routemaster_prometheus.logger:PrometheusLogger
      kwargs:
        path: /metrics

This package is based on the official Python Promeutheus bindings in ``prometheus_client` <https://pypi.org/project/prometheus_client/>`_. In order for that package to operate in a multithreaded program such as Routemaster, the environment variable prometheus_multiproc_dir must be set to a writeable directory for temporary files. It does not need to be backed up as nothing is persisted between application launches.

This is already done for you in the thread/routemaster Docker image provided, but when deploying in a custom way you may wish to change this directory.