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slug: /1013/operator-manual/
displayed_sidebar: "0.1"
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# Dagger Operator Manual

## Custom buildkit setup

Dagger can be configured to use an existing buildkit daemon, running either locally or remotely. This can be done using two environment variables: `BUILDKIT_HOST` and `DOCKER_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
```

To use a buildkit daemon running on a remote docker host (be careful to properly secure remotely accessible docker hosts!)

```shell
export BUILDKIT_HOST=docker-container://super-buildkit
export DOCKER_HOST=tcp://my-remote-docker-host:2376
```

## OpenTelemetry Support

Both Dagger and buildkit support opentelemetry. To capture traces to
[Jaeger](https://github.com/jaegertracing/jaeger), set the `OTEL_EXPORTER_JAEGER_ENDPOINT` 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 BUILDKIT_HOST=docker-container://dagger-buildkitd-jaeger
export OTEL_EXPORTER_JAEGER_ENDPOINT=http://localhost:14268/api/traces

dagger up
```

You can then go to [http://localhost:16686/](http://localhost:16686/) in your browser to see the traces.