Dockerfile

# syntax = docker/dockerfile:1
# syntax = docker/dockerfile:experimental

内置变量

FROM alpine
ARG TARGETPLATFORM

env	for
TARGETPLATFORM	构建结果的平台
TARGETOS	OS of TARGETPLATFORM
TARGETARCH	arch of TARGETPLATFORM
TARGETVARIANT	variant of TARGETPLATFORM
BUILDPLATFORM	执行构建的节点的平台
BUILDOS	OS of BUILDPLATFORM
BUILDARCH	arch of BUILDPLATFORM
BUILDVARIANT	variant of BUILDPLATFORM

platform
- linux/amd64, linux/arm/v7, windows/amd64

BuildKit 内置

Arg	Type	Description
BUILDKIT_CACHE_MOUNT_NS	String	Set optional cache ID namespace.
BUILDKIT_CONTEXT_KEEP_GIT_DIR	Bool	Trigger git context to keep the .git directory.
BUILDKIT_INLINE_CACHE2	Bool	Inline cache metadata to image config or not.
BUILDKIT_MULTI_PLATFORM	Bool	Opt into determnistic output regardless of multi-platform output or not.
BUILDKIT_SANDBOX_HOSTNAME	String	Set the hostname (default buildkitsandbox)
BUILDKIT_SYNTAX	String	Set frontend image
SOURCE_DATE_EPOCH	Int	Set the UNIX timestamp for created image and layers. More info from reproducible builds. Supported since Dockerfile 1.5, BuildKit 0.11

ssh clone

FROM alpine
RUN --mount=type=ssh \
    apk add git openssh-client \
    && install -m 0700 -d ~/.ssh \
    && ssh-keyscan github.com >> ~/.ssh/known_hosts \
    && git clone git@github.com:wener/wode.git

ssh clone​

ssh clone