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49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
## OpenTracing Setup
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Dendrite uses [Jaeger](https://www.jaegertracing.io/) for tracing between microservices.
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Tracing shows the nesting of logical spans which provides visibility on how the microservices interact.
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This document explains how to set up Jaeger locally on a single machine.
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### Set up the Jaeger backend
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The [easiest way](https://www.jaegertracing.io/docs/1.18/getting-started/) is to use the all-in-one Docker image:
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```
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$ docker run -d --name jaeger \
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-e COLLECTOR_ZIPKIN_HTTP_PORT=9411 \
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-p 5775:5775/udp \
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-p 6831:6831/udp \
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-p 6832:6832/udp \
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-p 5778:5778 \
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-p 16686:16686 \
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-p 14268:14268 \
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-p 14250:14250 \
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-p 9411:9411 \
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jaegertracing/all-in-one:1.18
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```
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### Configuring Dendrite to talk to Jaeger
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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)
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```
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tracing:
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enabled: true
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jaeger:
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serviceName: "dendrite"
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disabled: false
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rpc_metrics: true
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tags: []
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sampler:
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type: const
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param: 1
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```
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then run the monolith server with `--api true` to use polylith components which do tracing spans:
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```
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$ ./dendrite-monolith-server --tls-cert server.crt --tls-key server.key --config dendrite.yaml --api true
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```
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### Checking traces
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Visit http://localhost:16686 to see traces under `DendriteMonolith`.
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