从 Compose 文件使用 Bake 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 格式存在一些限制:
- 指定变量或全局范围属性目前尚不支持
inherits服务字段不受支持,但您可以使用 YAML 锚点 来引用其他服务,如上一个示例中使用&build-dev所演示的那样。
.env 个文件
你可以在名为.env的环境文件中声明默认环境变量。该文件将从执行命令的当前工作目录加载,并应用于通过-f传递的compose定义。
# 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
.env文件中的环境变量。
扩展字段为 x-bake
当某些字段在 compose 规范中不可用时,您可以在 compose 文件中使用
特殊扩展 字段
x-bake 来评估额外字段:
# 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
}
}
}x-bake 的有效字段完整列表:
cache-fromcache-tocontextsno-cacheno-cache-filteroutputplatformspullsecretsshtags