ARG BUILDX_VERSION=0.9.1 ARG DOCKER_VERSION=20.10-dind ARG GOLANG_VERSION=1.18 FROM --platform=$BUILDPLATFORM golang:${GOLANG_VERSION} as build COPY . /src WORKDIR /src ARG TARGETOS TARGETARCH RUN --mount=type=cache,target=/root/.cache/go-build \ --mount=type=cache,target=/go/pkg \ make build FROM docker/buildx-bin:${BUILDX_VERSION} as buildx-bin FROM docker:${DOCKER_VERSION} RUN apk --update --no-cache add coredns COPY --from=build /src/Corefile /etc/coredns/Corefile COPY --from=buildx-bin /buildx /usr/libexec/docker/cli-plugins/docker-buildx COPY --from=build /src/plugin-docker-buildx /bin/plugin-docker-buildx ENV DOCKER_HOST=unix:///var/run/docker.sock ENTRYPOINT ["/usr/local/bin/dockerd-entrypoint.sh", "plugin-docker-buildx"]