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dendrite/docs/development/tracing/setup.md
Kento Okamoto 76db8e90de
Dendrite Documentation Fix (#2913) 
### Pull Request Checklist

<!-- Please read
https://matrix-org.github.io/dendrite/development/contributing before
submitting your pull request -->
I was reading through the Dendrite documentation on
https://matrix-org.github.io/dendrite/development/contributing and
noticed the installation link leads to a 404 error. This link works fine
if it is viewed directly from
[docs/CONTRIBUTING.md](https://github.com/matrix-org/dendrite/blob/main/docs/CONTRIBUTING.md)
but this might not be very obvious to new contributors who are reading
through the [contribution
page](https://matrix-org.github.io/dendrite/development/contributing)
directly.

This PR is mainly a small re-organization of the online documentation
mainly in the
[Development](https://matrix-org.github.io/dendrite/development) tab
along with any links throughout the doc that may be impacted by the
change. This does not contain any Go unit tests as this does not
actually touch core dendrite functionality.

* [ ] I have added Go unit tests or [Complement integration
tests](https://github.com/matrix-org/complement) for this PR _or_ I have
justified why this PR doesn't need tests
* [x] Pull request includes a [sign off below using a legally
identifiable
name](https://matrix-org.github.io/dendrite/development/contributing#sign-off)
_or_ I have already signed off privately

Signed-off-by: `Kento Okamoto <kentokamoto@proton.me>`
2022-12-12 16:46:37 +00:00

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title parent grand_parent permalink
Setup OpenTracing Development /development/opentracing/setup

OpenTracing Setup

Dendrite uses Jaeger for tracing between microservices. Tracing shows the nesting of logical spans which provides visibility on how the microservices interact. This document explains how to set up Jaeger locally on a single machine.

Set up the Jaeger backend

The easiest way is to use the all-in-one Docker image:

$ docker run -d --name jaeger \
  -e COLLECTOR_ZIPKIN_HTTP_PORT=9411 \
  -p 5775:5775/udp \
  -p 6831:6831/udp \
  -p 6832:6832/udp \
  -p 5778:5778 \
  -p 16686:16686 \
  -p 14268:14268 \
  -p 14250:14250 \
  -p 9411:9411 \
  jaegertracing/all-in-one:1.18

Configuring Dendrite to talk to Jaeger

Modify your config to look like: (this will send every single span to Jaeger which will be slow on large instances, but for local testing it's fine)

tracing:
  enabled: true
  jaeger:
    serviceName: "dendrite"
    disabled: false
    rpc_metrics: true
    tags: []
    sampler:
      type: const
      param: 1

then run the monolith server with --api true to use polylith components which do tracing spans:

./dendrite-monolith-server --tls-cert server.crt --tls-key server.key --config dendrite.yaml --api true

Checking traces

Visit http://localhost:16686 to see traces under DendriteMonolith.