Overview

The mod_wsgi-telemetry package provides an external telemetry ingester and live UI for the mod_wsgi Apache module. With the WSGITelemetryService directive enabled in Apache, each mod_wsgi process (daemon-mode worker or embedded-mode Apache child) emits per-interval binary datagrams summarising its throughput, latency distribution, capacity utilisation, CPU and memory consumption, and any active slow requests. The ingester receives those datagrams over a local UNIX socket, aggregates them across every reporting process, and serves a browser-based live UI together with a curses terminal monitor for hosts where opening a browser is impractical.

The package is distributed separately from mod_wsgi itself so that an installation using the operating-system mod_wsgi package, or any other manually-configured Apache, can use the telemetry pipeline without adopting the PyPi mod_wsgi or mod_wsgi-express packages.

The ingester is intended to run co-located with the Apache instance it observes: the transport is a local UNIX datagram socket, and the UI binds to the loopback interface by default. For remote access, either an SSH tunnel or an authenticated reverse proxy is recommended.

Once installed, launch the ingester with:

mod_wsgi-telemetry serve

It binds unix:/tmp/mod_wsgi-telemetry.sock for incoming datagrams and serves the browser UI on http://127.0.0.1:8888/ by default. A mod_wsgi-telemetry top subcommand provides a curses-based terminal monitor for the same data.

For the full configuration reference, including the WSGITelemetryService, WSGITelemetryOptions and WSGISlowRequests Apache directives, the matching mod_wsgi-express options, socket-permission handling for multi-user deployments, and the remote-access patterns, see the External Telemetry Service page in the mod_wsgi documentation site at https://www.modwsgi.org.

This package is still being iterated on. The directive set, option names, wire format and ingester CLI may change in a future release; pair an ingester release with the matching mod_wsgi release until the pipeline stabilises.