使用 Bake 从 Compose 文件进行构建
目录
Bake 支持 Compose 文件格式来解析 Compose 文件并将每个服务转换为目标。
# 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
$ docker buildx bake --print
{
"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"]
}
}
}
与 HCL 格式相比,compose 格式有一些限制:
- 尚不支持指定变量或全局范围属性
inherits
service 字段,但您可以使用 YAML 锚点来引用其他服务,如前面的示例所示。&build-dev
.env
文件
您可以在名为 的环境文件中声明默认环境变量。此文件将从当前工作目录
其中,执行命令并将其应用于传递的 Compose 定义
跟。.env
-f
# docker-compose.yml
services:
webapp:
image: docker.io/username/webapp:${TAG:-v1.0.0}
build:
dockerfile: Dockerfile
# .env
TAG=v1.1.0
$ docker buildx bake --print
{
"group": {
"default": {
"targets": ["webapp"]
}
},
"target": {
"webapp": {
"context": ".",
"dockerfile": "Dockerfile",
"tags": ["docker.io/username/webapp:v1.1.0"]
}
}
}
注意
系统环境变量优先于环境变量 在文件中。
.env
使用 x-bake
的 Extension 字段
如果某些字段在 Compose 规范中不可用,您可以使用
Compose 文件中的特殊扩展名字段,用于评估额外的字段:x-bake
# 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
$ docker buildx bake --print
{
"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
}
}
}
的有效字段的完整列表 :x-bake
cache-from
cache-to
contexts
no-cache
no-cache-filter
output
platforms
pull
secret
ssh
tags