tracing

Distributed tracing

Version on this page:	0.0.5.2
LTS Haskell 23.26:	0.0.7.4
Stackage Nightly 2025-07-02:	0.0.7.4
Latest on Hackage:	0.0.7.4

See all snapshots tracing appears in

BSD-3-Clause licensed by Matthieu Monsch

Maintained by [email protected]

This version can be pinned in stack with:tracing-0.0.5.2@sha256:a54ea17777c8a41a52e920e1c9d3842ee0c237edb1b09c14fa65f74f401c22fc,1442

Module documentation for 0.0.5.2

Control
- Control.Monad
  - Control.Monad.Trace
    - Control.Monad.Trace.Class
Monitor
- Monitor.Tracing
  - Monitor.Tracing.Local
  - Monitor.Tracing.Zipkin

Depends on 15 packages(full list with versions):

aeson, base, base16-bytestring, bytestring, case-insensitive, containers, http-client, mtl, network, random, stm, text, time, transformers, unliftio

Tracing

An OpenTracing-compliant, simple, and extensible distributed tracing library.

Simple: add a single MonadTrace constraint to start tracing, without making your code harder to test!
Extensible: use the built-in Zipkin backend or hook in your own trace publication logic.

import Monitor.Tracing

-- A traced action with its root span and two children.
run :: MonadTrace m => m ()
run = rootSpan alwaysSampled "parent" $ do
  childSpan "child-a" runA
  childSpan "child-b" runB

To learn more, hop on over to Monitor.Tracing, or take a look at examples in the examples/ folder.