docs: rework bake compose file definition

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>
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CrazyMax 3 years ago
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@ -0,0 +1,222 @@
---
title: "Building from Compose file"
keywords: build, buildx, bake, buildkit, compose
---
## Specification
Bake uses the [compose-spec](https://docs.docker.com/compose/compose-file/) to
parse a compose file and translate each service to a [target](file-definition.md#target).
```yaml
# docker-compose.yml
services:
webapp-dev:
build: &build-dev
dockerfile: Dockerfile.webapp
tags:
- docker.io/username/webapp:latest
cache_from:
- docker.io/username/webapp:cache
cache_to:
- docker.io/username/webapp:cache
webapp-release:
build:
<<: *build-dev
x-bake:
platforms:
- linux/amd64
- linux/arm64
db:
image: docker.io/username/db
build:
dockerfile: Dockerfile.db
```
```console
$ docker buildx bake --print
```
```json
{
"group": {
"default": {
"targets": [
"db",
"webapp-dev",
"webapp-release"
]
}
},
"target": {
"db": {
"context": ".",
"dockerfile": "Dockerfile.db",
"tags": [
"docker.io/username/db"
]
},
"webapp-dev": {
"context": ".",
"dockerfile": "Dockerfile.webapp",
"tags": [
"docker.io/username/webapp:latest"
],
"cache-from": [
"docker.io/username/webapp:cache"
],
"cache-to": [
"docker.io/username/webapp:cache"
]
},
"webapp-release": {
"context": ".",
"dockerfile": "Dockerfile.webapp",
"tags": [
"docker.io/username/webapp:latest"
],
"cache-from": [
"docker.io/username/webapp:cache"
],
"cache-to": [
"docker.io/username/webapp:cache"
],
"platforms": [
"linux/amd64",
"linux/arm64"
]
}
}
}
```
Unlike the [HCL format](file-definition.md#hcl-definition), there are some
limitations with the compose format:
* Specifying variables or global scope attributes is not yet supported
* `inherits` service field is not supported, but you can use [YAML anchors](https://docs.docker.com/compose/compose-file/#fragments) to reference other services like the example above
## Extension field with `x-bake`
Even if some fields are not (yet) available in the compose specification, you
can use the [special extension](https://docs.docker.com/compose/compose-file/#extension)
field `x-bake` in your compose file to evaluate extra fields:
```yaml
# docker-compose.yml
services:
addon:
image: ct-addon:bar
build:
context: .
dockerfile: ./Dockerfile
args:
CT_ECR: foo
CT_TAG: bar
x-bake:
tags:
- ct-addon:foo
- ct-addon:alp
platforms:
- linux/amd64
- linux/arm64
cache-from:
- user/app:cache
- type=local,src=path/to/cache
cache-to:
- type=local,dest=path/to/cache
pull: true
aws:
image: ct-fake-aws:bar
build:
dockerfile: ./aws.Dockerfile
args:
CT_ECR: foo
CT_TAG: bar
x-bake:
secret:
- id=mysecret,src=./secret
- id=mysecret2,src=./secret2
platforms: linux/arm64
output: type=docker
no-cache: true
```
```console
$ docker buildx bake --print
```
```json
{
"group": {
"default": {
"targets": [
"aws",
"addon"
]
}
},
"target": {
"addon": {
"context": ".",
"dockerfile": "./Dockerfile",
"args": {
"CT_ECR": "foo",
"CT_TAG": "bar"
},
"tags": [
"ct-addon:foo",
"ct-addon:alp"
],
"cache-from": [
"user/app:cache",
"type=local,src=path/to/cache"
],
"cache-to": [
"type=local,dest=path/to/cache"
],
"platforms": [
"linux/amd64",
"linux/arm64"
],
"pull": true
},
"aws": {
"context": ".",
"dockerfile": "./aws.Dockerfile",
"args": {
"CT_ECR": "foo",
"CT_TAG": "bar"
},
"tags": [
"ct-fake-aws:bar"
],
"secret": [
"id=mysecret,src=./secret",
"id=mysecret2,src=./secret2"
],
"platforms": [
"linux/arm64"
],
"output": [
"type=docker"
],
"no-cache": true
}
}
}
```
Complete list of valid fields for `x-bake`:
* `cache-from`
* `cache-to`
* `no-cache`
* `no-cache-filter`
* `output`
* `platforms`
* `pull`
* `secret`
* `ssh`
* `tags`

@ -1,125 +0,0 @@
---
title: "Extension field with Compose"
keywords: build, buildx, bake, buildkit, compose
---
[Special extension](https://docs.docker.com/compose/compose-file/#extension)
field `x-bake` can be used in your compose file to evaluate fields that are not
(yet) available in the [build definition](https://docs.docker.com/compose/compose-file/build/#build-definition).
```yaml
# docker-compose.yml
services:
addon:
image: ct-addon:bar
build:
context: .
dockerfile: ./Dockerfile
args:
CT_ECR: foo
CT_TAG: bar
x-bake:
tags:
- ct-addon:foo
- ct-addon:alp
platforms:
- linux/amd64
- linux/arm64
cache-from:
- user/app:cache
- type=local,src=path/to/cache
cache-to: type=local,dest=path/to/cache
pull: true
aws:
image: ct-fake-aws:bar
build:
dockerfile: ./aws.Dockerfile
args:
CT_ECR: foo
CT_TAG: bar
x-bake:
secret:
- id=mysecret,src=./secret
- id=mysecret2,src=./secret2
platforms: linux/arm64
output: type=docker
no-cache: true
```
```console
$ docker buildx bake --print
```
```json
{
"group": {
"default": {
"targets": [
"aws",
"addon"
]
}
},
"target": {
"addon": {
"context": ".",
"dockerfile": "./Dockerfile",
"args": {
"CT_ECR": "foo",
"CT_TAG": "bar"
},
"tags": [
"ct-addon:foo",
"ct-addon:alp"
],
"cache-from": [
"user/app:cache",
"type=local,src=path/to/cache"
],
"cache-to": [
"type=local,dest=path/to/cache"
],
"platforms": [
"linux/amd64",
"linux/arm64"
],
"pull": true
},
"aws": {
"context": ".",
"dockerfile": "./aws.Dockerfile",
"args": {
"CT_ECR": "foo",
"CT_TAG": "bar"
},
"tags": [
"ct-fake-aws:bar"
],
"secret": [
"id=mysecret,src=./secret",
"id=mysecret2,src=./secret2"
],
"platforms": [
"linux/arm64"
],
"output": [
"type=docker"
],
"no-cache": true
}
}
}
```
Complete list of valid fields for `x-bake`:
* `cache-from`
* `cache-to`
* `no-cache`
* `no-cache-filter`
* `output`
* `platforms`
* `pull`
* `secret`
* `ssh`
* `tags`

@ -295,19 +295,10 @@ target "db" {
```yaml
# docker-compose.yml
services:
webapp-dev: &dev
webapp:
image: docker.io/username/webapp:latest
build:
dockerfile: Dockerfile.webapp
tags:
- docker.io/username/webapp:latest
webapp-release:
<<: *dev
build:
x-bake:
platforms:
- linux/amd64
- linux/arm64
db:
image: docker.io/username/db
@ -315,18 +306,9 @@ services:
dockerfile: Dockerfile.db
```
> **Limitations**
>
> Bake uses the [compose-spec](https://docs.docker.com/compose/compose-file/) to
> parse a compose file. Some fields are not (yet) available, but you can use
> the [special extension field `x-bake`](compose-xbake.md).
>
> `inherits` service field is also not supported. Use [YAML anchors](https://docs.docker.com/compose/compose-file/#fragments)
> to reference other services.
> **Note**
>
> Specifying variables or global scope attributes is not yet supported for
> compose files.
{: .warning }
> See [Building from Compose file](compose-file.md) page for more details.
## Remote definition

@ -36,4 +36,4 @@ and also allows better code reuse, different target groups and extended features
* [Configuring builds](configuring-build.md)
* [User defined HCL functions](hcl-funcs.md)
* [Defining additional build contexts and linking targets](build-contexts.md)
* [Extension field with Compose](compose-xbake.md)
* [Building from Compose file](compose-file.md)

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