Docs: guides: customizing your buildkit installation

Signed-off-by: Solomon Hykes <solomon@dagger.io>
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Solomon Hykes 2022-04-08 08:08:38 +00:00
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slug: /1223/custom-buildkit/
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# Customizing your Buildkit installation
## Using a custom buildkit daemon
Dagger can be configured to use an existing buildkit daemon, running either locally or remotely. This can be done using the environment variable `BUILDKIT_HOST`.
To use a buildkit daemon listening on TCP port `1234` on localhost:
```shell
export BUILDKIT_HOST=tcp://localhost:1234
```
To use a buildkit daemon running in a container named "super-buildkit" on the local docker host:
```shell
export BUILDKIT_HOST=docker-container://super-buildkit
```
## OpenTracing Support
Both Dagger and buildkit support opentracing. To capture traces to
[Jaeger](https://github.com/jaegertracing/jaeger), set the `JAEGER_TRACE` environment variable to the collection address.
A `docker-compose` file is available to help bootstrap the tracing environment:
```shell
docker-compose -f ./dagger-main/tracing.compose.yaml up -d
export JAEGER_TRACE=localhost:6831
export BUILDKIT_HOST=docker-container://dagger-buildkitd-jaeger
dagger up
```
You can then go to [http://localhost:16686/](http://localhost:16686/) in your browser to see the traces.