Use docker buildx and remove qemu-static binary (#4922)

build/images/nginx/Dockerfile

@@ -1,6 +1,6 @@
 FROM quay.io/kubernetes-ingress-controller/debian-base-amd64:0.1
 
-ENV TERRAFORM_VERSION 0.12.16
+ENV TERRAFORM_VERSION 0.12.19
 
 RUN clean-install \
     bash \

build/images/nginx/build-nginx.sh

@@ -64,18 +64,26 @@ apt -q=3 update
 
 apt -q=3 install docker-ce --yes
 
+export DOCKER_CLI_EXPERIMENTAL=enabled
+
+mkdir -p ~/.docker
+echo '{ "experimental": "enabled", "aliases": { "builder": "buildx" } }' > ~/.docker/config.json
+
 echo ${docker_password} | docker login -u ${docker_username} --password-stdin quay.io
 
 curl -sL -o /usr/local/bin/gimme https://raw.githubusercontent.com/travis-ci/gimme/master/gimme
 chmod +x /usr/local/bin/gimme
 
-eval "$(gimme 1.13)"
+eval "$(gimme 1.13.6)"
 
 git clone https://github.com/kubernetes/ingress-nginx
 
 cd ingress-nginx/images/nginx
 
-make register-qemu
+docker run --rm --privileged docker/binfmt:66f9012c56a8316f9244ffd7622d7c21c1f6f28d
+
+docker buildx create --name ingress-nginx
+docker buildx use ingress-nginx
 
 export TAG=$(git rev-parse HEAD)
 

images/nginx/Makefile

@@ -19,28 +19,11 @@ ARCH ?= $(shell go env GOARCH)
 DOCKER ?= docker
 
 ALL_ARCH = amd64 arm arm64
-SED_I?=sed -i
-GOHOSTOS ?= $(shell go env GOHOSTOS)
-
-ifeq ($(GOHOSTOS),darwin)
-  SED_I=sed -i ''
-endif
-
-QEMUVERSION=v4.1.1-1
 
 IMGNAME = nginx
 IMAGE = $(REGISTRY)/$(IMGNAME)
 MULTI_ARCH_IMG = $(IMAGE)-$(ARCH)
 
-ifeq ($(ARCH),arm)
-	QEMUARCH=arm
-endif
-ifeq ($(ARCH),arm64)
-	QEMUARCH=aarch64
-endif
-
-TEMP_DIR := $(shell mktemp -d)
-
 all: all-container
 
 image-info:
@@ -58,30 +41,17 @@ all-push: $(addprefix sub-push-,$(ALL_ARCH))
 
 container: .container-$(ARCH)
 .container-$(ARCH):
-	cp -r ./rootfs/* $(TEMP_DIR)
-	cd $(TEMP_DIR) && $(SED_I) "s|ARCH|$(QEMUARCH)|g" Dockerfile
-
-ifeq ($(ARCH),amd64)
-	# When building "normally" for amd64, remove the whole line, it has no part in the amd64 image
-	cd $(TEMP_DIR) && $(SED_I) "/CROSS_BUILD_/d" Dockerfile
-else
-	# When cross-building, only the placeholder "CROSS_BUILD_" should be removed
-	curl -sSL https://github.com/multiarch/qemu-user-static/releases/download/$(QEMUVERSION)/x86_64_qemu-$(QEMUARCH)-static.tar.gz | tar -xz -C $(TEMP_DIR)
-	cd $(TEMP_DIR) && $(SED_I) "s/CROSS_BUILD_//g" Dockerfile
-endif
-
-	$(DOCKER) build --no-cache -t $(MULTI_ARCH_IMG):$(TAG) $(TEMP_DIR)
+	$(DOCKER) buildx build \
+		--no-cache \
+		--progress plain \
+		--platform linux/$(ARCH) \
+		-t $(MULTI_ARCH_IMG):$(TAG) rootfs
 
 ifeq ($(ARCH), amd64)
 	# This is for to maintain the backward compatibility
 	$(DOCKER) tag $(MULTI_ARCH_IMG):$(TAG) $(IMAGE):$(TAG)
 endif
 
-.PHONY: register-qemu
-register-qemu:
-	# Register /usr/bin/qemu-ARCH-static as the handler for binaries in multiple platforms
-	$(DOCKER) run --rm --privileged multiarch/qemu-user-static:register --reset
-
 push: .push-$(ARCH)
 .push-$(ARCH): .container-$(ARCH)
 	$(DOCKER) push $(MULTI_ARCH_IMG):$(TAG)

images/nginx/rootfs/Dockerfile

@@ -15,8 +15,6 @@
 
 FROM alpine:3.11 as builder
 
-CROSS_BUILD_COPY qemu-ARCH-static /usr/bin/
-
 COPY . /
 
 RUN apk add -U bash \