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Update dockerfiles.md to mention that BuildKit is the default builder from Docker v24 onwards #5921

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Jun 10, 2023
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Update dockerfiles.md to mention that BuildKit is the default builder from Docker v24 onwards #5921

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Update dockerfiles.md to mention that BuildKit is the default builder…
aradalvand Jun 9, 2023
4d8f831
Fix `BuildKit` casing
aradalvand Jun 9, 2023
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8 changes: 4 additions & 4 deletions docs/deployment/builders/dockerfiles.md
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Expand Up @@ -148,18 +148,18 @@ ENV NODE_ENV ${NODE_ENV}
RUN echo $NODE_ENV
```

### Building images with Docker Buildkit
### Building images with Docker BuildKit

If your Dockerfile is using Docker engine's [buildkit](https://docs.docker.com/develop/develop-images/build_enhancements/) (not to be confused with buildpacks), then the `DOCKER_BUILDKIT=1` environment variable needs to be set. Additionally, complete build log output can be forced via `BUILDKIT_PROGRESS=plain`. Both of these environment variables can be set as follows:
If your Dockerfile is using Docker Engine's [BuildKit](https://docs.docker.com/develop/develop-images/build_enhancements/) (not to be confused with buildpacks), then the `DOCKER_BUILDKIT=1` environment variable needs to be set (unless you're using Docker Engine v24 or higher, which [uses BuildKit by default](https://docs.docker.com/build/buildkit/#getting-started)). Additionally, complete build log output can be forced via `BUILDKIT_PROGRESS=plain`. Both of these environment variables can be set as follows:

```shell
echo "export DOCKER_BUILDKIT=1" | sudo tee -a /etc/default/dokku
echo "export BUILDKIT_PROGRESS=plain" | sudo tee -a /etc/default/dokku
```

#### Buildkit directory caching
#### BuildKit directory caching

Buildkit implements the `RUN --mount` option, enabling mount directory caches for `RUN` directives. The following is an example that mounts debian packaging related directories, which can speed up fetching of remote package data.
BuildKit implements the `RUN --mount` option, enabling mount directory caches for `RUN` directives. The following is an example that mounts debian packaging related directories, which can speed up fetching of remote package data.

```Dockerfile
FROM debian:latest
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