Iniital multi arch build

Makefile

@@ -59,6 +59,30 @@ E2E_TEST_CONFIG ?=
 
 LDFLAGS = -ldflags "-s -w -X sigs.k8s.io/node-feature-discovery/pkg/version.version=$(VERSION) -X sigs.k8s.io/node-feature-discovery/source.pathPrefix=$(HOSTMOUNT_PREFIX)"
 
+# multi-arch build with buildx
+IMAGE_ALL_PLATFORMS ?= linux/amd64,linux/arm64
+
+# enable buildx
+ensure-buildx:
+	./hack/init-buildx.sh
+
+IMAGE_BUILDX_CMD ?= DOCKER_CLI_EXPERIMENTAL=enabled docker buildx build --platform=${IMAGE_ALL_PLATFORMS} --progress=auto --pull
+
+IMAGE_BUILD_ARGS = --build-arg VERSION=$(VERSION) \
+	    	   --build-arg HOSTMOUNT_PREFIX=$(CONTAINER_HOSTMOUNT_PREFIX) \
+	    	   --build-arg BASE_IMAGE_FULL=$(BASE_IMAGE_FULL) \
+	    	   --build-arg BASE_IMAGE_MINIMAL=$(BASE_IMAGE_MINIMAL)
+
+IMAGE_BUILD_ARGS_FULL = --target full \
+                	-t $(IMAGE_TAG) \
+	    		$(foreach tag,$(IMAGE_EXTRA_TAGS),-t $(tag)) \
+	    		$(IMAGE_BUILD_EXTRA_OPTS) ./
+
+IMAGE_BUILD_ARGS_MINIMAL = --target minimal \
+                	   -t $(IMAGE_TAG)-minimal \
+	            	   $(foreach tag,$(IMAGE_EXTRA_TAGS),-t $(tag)-minimal) \
+	            	   $(IMAGE_BUILD_EXTRA_OPTS) ./
+
 all: image
 
 build:
@@ -69,22 +93,14 @@ install:
 	$(GO_CMD) install -v $(LDFLAGS) ./cmd/...
 
 image: yamls
-	$(IMAGE_BUILD_CMD) --build-arg VERSION=$(VERSION) \
+	$(IMAGE_BUILD_CMD) $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_FULL)
-	    --target full \
+	$(IMAGE_BUILD_CMD) $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_MINIMAL)
-	    --build-arg HOSTMOUNT_PREFIX=$(CONTAINER_HOSTMOUNT_PREFIX) \
+
-	    --build-arg BASE_IMAGE_FULL=$(BASE_IMAGE_FULL) \
+image-all: ensure-buildx yamls
-	    --build-arg BASE_IMAGE_MINIMAL=$(BASE_IMAGE_MINIMAL) \
+# --load : not implemented yet, see: https://github.com/docker/buildx/issues/59
-	    -t $(IMAGE_TAG) \
+	$(IMAGE_BUILDX_CMD) $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_FULL)
-	    $(foreach tag,$(IMAGE_EXTRA_TAGS),-t $(tag)) \
+	$(IMAGE_BUILDX_CMD) $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_MINIMAL)
-	    $(IMAGE_BUILD_EXTRA_OPTS) ./
+
-	$(IMAGE_BUILD_CMD) --build-arg VERSION=$(VERSION) \
-	    --target minimal \
-	    --build-arg HOSTMOUNT_PREFIX=$(CONTAINER_HOSTMOUNT_PREFIX) \
-	    --build-arg BASE_IMAGE_FULL=$(BASE_IMAGE_FULL) \
-	    --build-arg BASE_IMAGE_MINIMAL=$(BASE_IMAGE_MINIMAL) \
-	    -t $(IMAGE_TAG)-minimal \
-	    $(foreach tag,$(IMAGE_EXTRA_TAGS),-t $(tag)-minimal) \
-	    $(IMAGE_BUILD_EXTRA_OPTS) ./
 
 # clean NFD labels on all nodes
 # devel only
@@ -166,6 +182,10 @@ push:
 	$(IMAGE_PUSH_CMD) $(IMAGE_TAG)-minimal
 	for tag in $(IMAGE_EXTRA_TAGS); do $(IMAGE_PUSH_CMD) $$tag; $(IMAGE_PUSH_CMD) $$tag-minimal; done
 
+push-all:
+	$(IMAGE_BUILDX_CMD) --push $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_FULL)
+	$(IMAGE_BUILDX_CMD) --push $(IMAGE_BUILD_ARGS) $(IMAGE_BUILD_ARGS_MINIMAL)
+
 poll-images:
 	set -e; \
 	tags="$(foreach tag,$(IMAGE_TAG_NAME) $(IMAGE_EXTRA_TAG_NAMES),$(tag) $(tag)-minimal)" \

docs/advanced/developer-guide.md

@@ -43,6 +43,32 @@ Optional, this example with Docker.
 docker push <IMAGE_TAG>
 ```
 
+### Docker multi-arch builds with buildx
+
+The default set of architectures enabled for mulit-arch builds are `linux/amd64`
+and `linux/arm64`. If more architectures are needed one can override the
+`IMAGE_ALL_PLATFORMS` variable with a comma separated list of `OS/ARCH` tuples.
+
+#### Build the manifest-list with a container image per arch
+
+```bash
+make image-all
+```
+
+Currently `docker` does not support loading of manifest-lists meaning the images
+are not shown when executing `docker images`, see:
+[buildx issue #59](https://github.com/docker/buildx/issues/59).
+
+#### Push the manifest-list with container image per arch
+
+```bash
+make push-all
+```
+
+The resulting container image can be used in the same way on each arch by pulling
+e.g. `node-feature-discovery:v0.10.0` without specifying the architechture. The
+manifest-list will take care of providing the right architecture image.
+
 #### Change the job spec to use your custom image (optional)
 
 To use your published image from the step above instead of the
@@ -88,6 +114,8 @@ makefile overrides.
 | HOSTMOUNT_PREFIX           | Prefix of system directories for feature discovery (local builds) | / (*local builds*) /host- (*container builds*)
 | IMAGE_BUILD_CMD            | Command to build the image                                        | docker build
 | IMAGE_BUILD_EXTRA_OPTS     | Extra options to pass to build command                            | *empty*
+| IMAGE_BUILDX_CMD           | Command to build and push multi-arch images with buildx           | DOCKER_CLI_EXPERIMENTAL=enabled docker buildx build --platform=${IMAGE_ALL_PLATFORMS} --progress=auto --pull
+| IMAGE_ALL_PLATFORMS        | Comma seperated list of OS/ARCH tuples for mulit-arch builds    | linux/amd64,linux/arm64
 | IMAGE_PUSH_CMD             | Command to push the image to remote registry                      | docker push
 | IMAGE_REGISTRY             | Container image registry to use                                   | k8s.gcr.io/nfd
 | IMAGE_TAG_NAME             | Container image tag name                                          | &lt;nfd version&gt;

hack/init-buildx.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+# Copyright 2022 The Kubernetes 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.
+
+set -o errexit -o nounset -o pipefail
+
+export DOCKER_CLI_EXPERIMENTAL=enabled
+
+# We can skip setup if the current builder already has multi-arch
+# AND if it isn't the docker driver, which doesn't work
+current_builder="$(docker buildx inspect)"
+# linux/amd64, linux/arm64, linux/riscv64, linux/ppc64le, linux/s390x, linux/386, linux/arm/v7, linux/arm/v6
+if ! grep -q "^Driver: docker$"  <<<"${current_builder}" && \
+     grep -q "linux/amd64" <<<"${current_builder}" && \
+     grep -q "linux/arm64" <<<"${current_builder}"; then
+  exit 0
+fi
+
+# Ensure qemu is in binfmt_misc
+# Docker desktop already has these in versions recent enough to have buildx
+# We only need to do this setup on linux hosts
+if [ "$(uname)" == 'Linux' ]; then
+  # NOTE: this is pinned to a digest for a reason!
+  docker run --rm --privileged tonistiigi/binfmt:qemu-v6.1.0@sha256:11128304bc582dc7dbaa35947ff3e52e2610d23cecb410ddfa381a6ce74fa763 --install all
+fi
+
+# Ensure we use a builder that can leverage it (the default on linux will not)
+docker buildx rm nfd-builder || true
+docker buildx create --use --name=nfd-builder                 \
+  ${http_proxy:+--driver-opt env.http_proxy="$http_proxy"}    \
+  ${HTTP_PROXY:+--driver-opt env.HTTP_PROXY="$HTTP_PROXY"}    \
+  ${https_proxy:+--driver-opt env.https_proxy="$https_proxy"} \
+  ${HTTPS_PROXY:+--driver-opt env.HTTPS_PROXY="$HTTPS_PROXY"} \
+  ${no_proxy:+--driver-opt '"env.no_proxy='$no_proxy'"'}      \
+  ${NO_PROXY:+--driver-opt '"env.NO_PROXY='$NO_PROXY'"'}

scripts/test-infra/build-image.sh

@@ -1,3 +1,7 @@
 #!/bin/bash -e
 
+# local build
 make image
+
+# cross build
+make image-all

scripts/test-infra/push-image.sh

@@ -5,5 +5,4 @@
 # container image tag
 VERSION_OVERRIDE=${_GIT_TAG+VERSION=${_GIT_TAG:10}}
 
-make image $VERSION_OVERRIDE
+make push-all $VERSION_OVERRIDE
-make push $VERSION_OVERRIDE