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Diffstat (limited to 'images/Makefile')
| -rw-r--r-- | images/Makefile | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/images/Makefile b/images/Makefile new file mode 100644 index 000000000..1485607bd --- /dev/null +++ b/images/Makefile @@ -0,0 +1,93 @@ +#!/usr/bin/make -f + +# Copyright 2018 The gVisor Authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + +# ARCH is the architecture used for the build. This may be overriden at the +# command line in order to perform a cross-build (in a limited capacity). +ARCH := $(shell uname -m) + +# Note that the image prefixes used here must match the image mangling in +# runsc/testutil.MangleImage. Names are mangled in this way to ensure that all +# tests are using locally-defined images (that are consistent and idempotent). +REMOTE_IMAGE_PREFIX ?= gcr.io/gvisor-presubmit +LOCAL_IMAGE_PREFIX ?= gvisor.dev/images +ALL_IMAGES := $(subst /,_,$(subst ./,,$(shell find . -name Dockerfile -exec dirname {} \;))) +ifneq ($(ARCH),$(shell uname -m)) +DOCKER_PLATFORM_ARGS := --platform=$(ARCH) +else +DOCKER_PLATFORM_ARGS := +endif + +list-all-images: + @for image in $(ALL_IMAGES); do echo $${image}; done +.PHONY: list-build-images + +%-all-images: + @$(MAKE) $(patsubst %,$*-%,$(ALL_IMAGES)) + +# tag is a function that returns the tag name, given an image. +# +# The tag constructed is used to memoize the image generated (see README.md). +# This scheme is used to enable aggressive caching in a central repository, but +# ensuring that images will always be sourced using the local files if there +# are changes. +path = $(subst _,/,$(1)) +tag = $(shell find $(call path,$(1)) -type f -print | sort | xargs -n 1 sha256sum | sha256sum - | cut -c 1-16) +remote_image = $(REMOTE_IMAGE_PREFIX)/$(subst _,/,$(1))_$(ARCH):$(call tag,$(1)) +local_image = $(LOCAL_IMAGE_PREFIX)/$(subst _,/,$(1)) + +# rebuild builds the image locally. Only the "remote" tag will be applied. Note +# we need to explicitly repull the base layer in order to ensure that the +# architecture is correct. Note that we use the term "rebuild" here to avoid +# conflicting with the bazel "build" terminology, which is used elsewhere. +rebuild-%: register-cross + FROM=$(shell grep FROM $(call path,$*)/Dockerfile | cut -d' ' -f2-) && \ + docker pull $(DOCKER_PLATFORM_ARGS) $$FROM + T=$$(mktemp -d) && cp -a $(call path,$*)/* $$T && \ + docker build $(DOCKER_PLATFORM_ARGS) -t $(call remote_image,$*) $$T && \ + rm -rf $$T + +# pull will check the "remote" image and pull if necessary. If the remote image +# must be pulled, then it will tag with the latest local target. Note that pull +# may fail if the remote image is not available. +pull-%: + docker pull $(DOCKER_PLATFORM_ARGS) $(call remote_image,$*) + +# load will either pull the "remote" or build it locally. This is the preferred +# entrypoint, as it should never file. The local tag should always be set after +# this returns (either by the pull or the build). +load-%: + docker inspect $(call remote_image,$*) >/dev/null 2>&1 || $(MAKE) pull-$* || $(MAKE) rebuild-$* + docker tag $(call remote_image,$*) $(call local_image,$*) + +# push pushes the remote image, after either pulling (to validate that the tag +# already exists) or building manually. +push-%: load-% + docker push $(call remote_image,$*) + +# register-cross registers the necessary qemu binaries for cross-compilation. +# This may be used by any target that may execute containers that are not the +# native format. +register-cross: +ifneq ($(ARCH),$(shell uname -m)) +ifeq (,$(wildcard /proc/sys/fs/binfmt_misc/qemu-*)) + docker run --rm --privileged multiarch/qemu-user-static --reset --persistent yes +else + @true # Already registered. +endif +else + @true # No cross required. +endif +.PHONY: register-cross |