39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
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---
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slug: /1223/custom-buildkit/
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---
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# Customizing your Buildkit installation
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## Using a custom buildkit daemon
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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`.
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To use a buildkit daemon listening on TCP port `1234` on localhost:
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```shell
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export BUILDKIT_HOST=tcp://localhost:1234
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```
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To use a buildkit daemon running in a container named "super-buildkit" on the local docker host:
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```shell
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export BUILDKIT_HOST=docker-container://super-buildkit
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```
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## OpenTracing Support
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Both Dagger and buildkit support opentracing. To capture traces to
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[Jaeger](https://github.com/jaegertracing/jaeger), set the `JAEGER_TRACE` environment variable to the collection address.
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A `docker-compose` file is available to help bootstrap the tracing environment:
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```shell
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docker-compose -f ./dagger-main/tracing.compose.yaml up -d
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export JAEGER_TRACE=localhost:6831
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export BUILDKIT_HOST=docker-container://dagger-buildkitd-jaeger
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dagger up
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```
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You can then go to [http://localhost:16686/](http://localhost:16686/) in your browser to see the traces.
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