support for other arch than amd64

Makefile

@@ -1,12 +1,13 @@
 # Image URL to use all building/pushing image targets;
 # Use your own docker registry and image name for dev/test by overridding the
 # IMAGE_REPO, IMAGE_NAME and IMAGE_TAG environment variable.
-IMAGE_REPO ?= docker.io/morvencao
+IMAGE_REPO ?= 584416962002.dkr.ecr.us-west-2.amazonaws.com/nginx
 IMAGE_NAME ?= sidecar-injector
 
+
 # Github host to use for checking the source tree;
 # Override this variable ue with your own value if you're working on forked repo.
-GIT_HOST ?= github.com/morvencao
+GIT_HOST ?= github.com/yahavb
 
 PWD := $(shell pwd)
 BASE_DIR := $(shell basename $(PWD))
@@ -20,7 +21,17 @@ DEST := $(GOPATH)/src/$(GIT_HOST)/$(BASE_DIR)
 IMAGE_TAG ?= $(shell date +v%Y%m%d)-$(shell git describe --match=$(git rev-parse --short=8 HEAD) --tags --always --dirty)
 
 
+ARCH := $(shell uname -m)
+ifeq ($(ARCH),x86_64)
+    GOARCH ?= amd64
+else ifeq ($(ARCH),aarch64)
+    GOARCH ?= arm64
+else
+    $(error "This system's arch $(ARCH) isn't recognized/supported")
+endif
+
 LOCAL_OS := $(shell uname)
+
 ifeq ($(LOCAL_OS),Linux)
     TARGET_OS ?= linux
     XARGS_FLAGS="-r"
@@ -66,12 +77,12 @@ test:
 ############################################################
 
 build:
-	@echo "Building the $(IMAGE_NAME) binary..."
+	@echo "Building the $(IMAGE_NAME) binary for $(GOARCH)..."
 	@CGO_ENABLED=0 go build -o build/_output/bin/$(IMAGE_NAME) ./cmd/
 
 build-linux:
-	@echo "Building the $(IMAGE_NAME) binary for Docker (linux)..."
-	@GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build -o build/_output/linux/bin/$(IMAGE_NAME) ./cmd/
+	@echo "Building the $(IMAGE_NAME) binary for Docker (linux) $(GOARCH)..."
+	@GOOS=linux GOARCH=$(GOARCH) CGO_ENABLED=0 go build -o build/_output/linux/bin/$(IMAGE_NAME) ./cmd/
 
 ############################################################
 # image section

build/Dockerfile

@@ -1,7 +1,7 @@
-FROM alpine:latest
+FROM arm64v8/alpine:latest
 
 # set labels for metadata
-LABEL maintainer="Morven Cao<morvencao@gmail.com>" \
+LABEL maintainer="Yahav Biran<birayaha@amazon.com>" \
   name="sidecar-injector" \
   description="A Kubernetes mutating webhook server that implements sidecar injection" \
   summary="A Kubernetes mutating webhook server that implements sidecar injection"

deploy/configmap.yaml

@@ -2,7 +2,6 @@ apiVersion: v1
 kind: ConfigMap
 metadata:
   name: sidecar-injector-webhook-configmap
-  namespace: sidecar-injector
 data:
   sidecarconfig.yaml: |
     containers:

deploy/deployment.yaml

@@ -2,7 +2,6 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: sidecar-injector-webhook-deployment
-  namespace: sidecar-injector
   labels:
     app: sidecar-injector
 spec:

deploy/mutatingwebhook-ca-bundle.yaml

@@ -0,0 +1,21 @@
+apiVersion: admissionregistration.k8s.io/v1beta1
+kind: MutatingWebhookConfiguration
+metadata:
+  name: sidecar-injector-webhook-cfg
+  labels:
+    app: sidecar-injector
+webhooks:
+- name: sidecar-injector.morven.me
+  clientConfig:
+    service:
+      name: sidecar-injector-webhook-svc
+      path: "/mutate"
+    caBundle: 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
+  rules:
+  - operations: ["CREATE", "UPDATE"]
+    apiGroups: [""]
+    apiVersions: ["v1"]
+    resources: ["pods"]
+  namespaceSelector:
+    matchLabels:
+      sidecar-injection: enabled

deploy/nginxconfigmap.yaml

@@ -2,7 +2,6 @@ apiVersion: v1
 kind: ConfigMap
 metadata:
   name: nginx-configmap
-  namespace: sidecar-injector
 data:
   nginx.conf: |
     worker_processes  1;

deploy/service.yaml

@@ -2,7 +2,6 @@ apiVersion: v1
 kind: Service
 metadata:
   name: sidecar-injector-webhook-svc
-  namespace: sidecar-injector
   labels:
     app: sidecar-injector
 spec: