{ { % experimental \%}}
Bake is an experimental feature, and we are looking for feedback from users.
{ { % /experimental \%}}
Bake is a feature of Docker Buildx that lets you define your build configuraton using a declarative file, as opposed to specifying a complex CLI expression. It also lets you run multiple builds concurrently with a single invocation.
A Bake file can be written in HCL, JSON, or YAML formats, where the YAML format is an extension of a Docker Compose file. Here's an example Bake file in HCL format:
group "default" {
targets = ["frontend", "backend"]
}
target "frontend" {
context = "./frontend"
dockerfile = "frontend.Dockerfile"
args = {
NODE_VERSION = "22"
}
tags = ["myapp/frontend:latest"]
}
target "backend" {
context = "./backend"
dockerfile = "backend.Dockerfile"
args = {
GO_VERSION = "\{\{\% param "example_go_version" \%\}\}"
}
tags = ["myapp/backend:latest"]
}
The group
block defines a group of targets that can be built concurrently.
Each target
block defines a build target with its own configuration, such as
the build context, Dockerfile, and tags.
To invoke a build using the above Bake file, you can run:
$ docker buildx bake
This executes the default
group, which builds the frontend
and backend
targets concurrently.
Get started#
To learn how to get started with Bake, head over to the Bake introduction.