32 lines
853 B
Markdown
32 lines
853 B
Markdown
# OpenTelemetryTesla
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Tesla middleware that creates OpenTelemetry spans and injects tracing headers into HTTP requests for Tesla clients.
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## Installation
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If [available in Hex](https://hex.pm/docs/publish), the package can be installed
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by adding `opentelemetry_tesla` to your list of dependencies in `mix.exs`:
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```elixir
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def deps do
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[
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{:opentelemetry_tesla, "~> 2.1.0"}
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]
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end
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```
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## Setup
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Whilst using this middleware is as simple as adding it to your Tesla middlewares configuration, **It's very important to set the correct order of the middlewares**
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The is crucial to correctly get the parameterized version of the URL, something like `/api/users/:id` instead of `/api/users/3`.
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`OpenTelemetry` comes **first**, `PathParams` (if you're using it) comes after.
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```elixir
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Tesla.Middleware.OpenTelemetry
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Tesla.Middleware.PathParams
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```
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