Add local arm build (open-telemetry#1157)

* add local arm build

Signed-off-by: Efrat19 <efrat890089@gmail.com>

* fix typo

Signed-off-by: Efrat19 <efrat890089@gmail.com>

* add automatic amd build if needed

* fix amd to arm

* use buildx only

* support arm builds in container-target-allocator

* add default ARCH for e2e

Signed-off-by: Efrat19 <efrat890089@gmail.com>

* fix ARCH var

Signed-off-by: Efrat19 <efrat890089@gmail.com>
Co-authored-by: Pavol Loffay <p.loffay@gmail.com>

Makefile

@@ -10,6 +10,7 @@ AUTO_INSTRUMENTATION_NODEJS_VERSION ?= "$(shell grep -v '\#' versions.txt | grep
 AUTO_INSTRUMENTATION_PYTHON_VERSION ?= "$(shell grep -v '\#' versions.txt | grep autoinstrumentation-python | awk -F= '{print $$2}')"
 AUTO_INSTRUMENTATION_DOTNET_VERSION ?= "$(shell grep -v '\#' versions.txt | grep autoinstrumentation-dotnet | awk -F= '{print $$2}')"
 LD_FLAGS ?= "-X ${VERSION_PKG}.version=${VERSION} -X ${VERSION_PKG}.buildDate=${VERSION_DATE} -X ${VERSION_PKG}.otelCol=${OTELCOL_VERSION} -X ${VERSION_PKG}.targetAllocator=${TARGETALLOCATOR_VERSION} -X ${VERSION_PKG}.autoInstrumentationJava=${AUTO_INSTRUMENTATION_JAVA_VERSION} -X ${VERSION_PKG}.autoInstrumentationNodeJS=${AUTO_INSTRUMENTATION_NODEJS_VERSION} -X ${VERSION_PKG}.autoInstrumentationPython=${AUTO_INSTRUMENTATION_PYTHON_VERSION} -X ${VERSION_PKG}.autoInstrumentationDotNet=${AUTO_INSTRUMENTATION_DOTNET_VERSION}"
+ARCH ?= $(shell go env GOARCH)
 
 # Image URL to use all building/pushing image targets
 IMG_PREFIX ?= ghcr.io/${USER}/opentelemetry-operator
@@ -179,9 +180,10 @@ set-test-image-vars:
 	$(eval TARGETALLOCATOR_IMG=local/opentelemetry-operator-targetallocator:e2e)
 
 # Build the container image, used only for local dev purposes
+# buildx is used to ensure same results for arm based systems (m1/2 chips)
 .PHONY: container
 container:
-	docker build -t ${IMG} --build-arg VERSION_PKG=${VERSION_PKG} --build-arg VERSION=${VERSION} --build-arg VERSION_DATE=${VERSION_DATE} --build-arg OTELCOL_VERSION=${OTELCOL_VERSION} --build-arg TARGETALLOCATOR_VERSION=${TARGETALLOCATOR_VERSION} --build-arg AUTO_INSTRUMENTATION_JAVA_VERSION=${AUTO_INSTRUMENTATION_JAVA_VERSION}  --build-arg AUTO_INSTRUMENTATION_NODEJS_VERSION=${AUTO_INSTRUMENTATION_NODEJS_VERSION} --build-arg AUTO_INSTRUMENTATION_PYTHON_VERSION=${AUTO_INSTRUMENTATION_PYTHON_VERSION} --build-arg AUTO_INSTRUMENTATION_DOTNET_VERSION=${AUTO_INSTRUMENTATION_DOTNET_VERSION} .
+	docker buildx build --platform linux/${ARCH} -t ${IMG} --build-arg VERSION_PKG=${VERSION_PKG} --build-arg VERSION=${VERSION} --build-arg VERSION_DATE=${VERSION_DATE} --build-arg OTELCOL_VERSION=${OTELCOL_VERSION} --build-arg TARGETALLOCATOR_VERSION=${TARGETALLOCATOR_VERSION} --build-arg AUTO_INSTRUMENTATION_JAVA_VERSION=${AUTO_INSTRUMENTATION_JAVA_VERSION}  --build-arg AUTO_INSTRUMENTATION_NODEJS_VERSION=${AUTO_INSTRUMENTATION_NODEJS_VERSION} --build-arg AUTO_INSTRUMENTATION_PYTHON_VERSION=${AUTO_INSTRUMENTATION_PYTHON_VERSION} --build-arg AUTO_INSTRUMENTATION_DOTNET_VERSION=${AUTO_INSTRUMENTATION_DOTNET_VERSION} .
 
 # Push the container image, used only for local dev purposes
 .PHONY: container-push
@@ -190,7 +192,7 @@ container-push:
 
 .PHONY: container-target-allocator
 container-target-allocator:
-	docker build -t ${TARGETALLOCATOR_IMG} cmd/otel-allocator
+	docker buildx build --platform linux/${ARCH} -t ${TARGETALLOCATOR_IMG} cmd/otel-allocator
 
 .PHONY: start-kind
 start-kind: