Multi arch nginx-slim docker image

Signed-off-by: Manjunath A Kumatagi <mkumatag@in.ibm.com>

images/nginx-slim/Dockerfile

@@ -13,7 +13,7 @@
 # limitations under the License.
 
 
-FROM gcr.io/google_containers/ubuntu-slim:0.8
+FROM BASEIMAGE
 
 COPY build.sh /tmp
 

images/nginx-slim/Makefile

@@ -1,14 +1,30 @@
 all: push
 
 # 0.0.0 shouldn't clobber any released builds
-TAG = 0.15
-PREFIX = gcr.io/google_containers/nginx-slim
+TAG = 0.16
+REGISTRY = gcr.io/google_containers
+ARCH := $(shell go env GOARCH)
+
+IMGNAME = nginx-slim
+IMAGE = $(REGISTRY)/${IMGNAME}-$(ARCH)
+
+# Set default base image dynamically for each arch
+ifeq ($(ARCH),amd64)
+	BASEIMAGE?=gcr.io/google_containers/ubuntu-slim:0.8
+endif
+ifeq ($(ARCH),ppc64le)
+	BASEIMAGE?=ppc64le/ubuntu
+endif
+
+TEMP_DIR := $(shell mktemp -d)
 
 container:
-	docker build --pull -t $(PREFIX):$(TAG) .
+	cp ./* $(TEMP_DIR)
+	cd $(TEMP_DIR) && sed -i.bak 's|BASEIMAGE|$(BASEIMAGE)|g' Dockerfile
+	docker build --pull -t $(IMAGE):$(TAG) $(TEMP_DIR)
 
 push: container
-	gcloud docker -- push $(PREFIX):$(TAG)
+	gcloud docker -- push $(IMAGE):$(TAG)
 
 clean:
 	docker rmi -f $(PREFIX):$(TAG) || true

images/nginx-slim/build.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Copyright 2015 The Kubernetes Authors.
 #
@@ -32,6 +32,8 @@ export NGINX_SUBSTITUTIONS=bc58cb11844bc42735bbaef7085ea86ace46d05b
 
 export BUILD_PATH=/tmp/build
 
+ARCH=$(uname -p)
+
 get_src()
 {
   hash="$1"
@@ -47,6 +49,12 @@ get_src()
 mkdir "$BUILD_PATH"
 cd "$BUILD_PATH"
 
+if [[ ${ARCH} == "ppc64le" ]]; then
+  apt-get update && apt-get install -y software-properties-common && \
+    add-apt-repository -y ppa:ibmpackages/luajit
+  apt-get update && apt-get install -y lua5.1 lua5.1-dev
+fi
+
 # install required packages to build
 apt-get update && apt-get install --no-install-recommends -y \
   bash \
@@ -120,6 +128,11 @@ cd "$BUILD_PATH/nginx-$NGINX_VERSION"
 echo "Applying tls nginx patches..."
 patch -p1 < $BUILD_PATH/nginx__dynamic_tls_records.patch
 
+CC_OPT='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64'
+if [[ ${ARCH} == "x86_64" ]]; then
+  CC_OPT+=' -mtune=generic'
+fi
+
 ./configure \
   --prefix=/usr/share/nginx \
   --conf-path=/etc/nginx/nginx.conf \
@@ -154,7 +167,7 @@ patch -p1 < $BUILD_PATH/nginx__dynamic_tls_records.patch
   --without-mail_imap_module \
   --without-http_uwsgi_module \
   --without-http_scgi_module \
-  --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' \
+  --with-cc-opt="${CC_OPT}" \
   --add-module="$BUILD_PATH/ngx_devel_kit-$NDK_VERSION" \
   --add-module="$BUILD_PATH/set-misc-nginx-module-$SETMISC_VERSION" \
   --add-module="$BUILD_PATH/nginx-module-vts-$VTS_VERSION" \
@@ -169,7 +182,13 @@ patch -p1 < $BUILD_PATH/nginx__dynamic_tls_records.patch
 
 echo "Installing CJSON module"
 cd "$BUILD_PATH/lua-cjson-$LUA_CJSON_VERSION"
-make LUA_INCLUDE_DIR=/usr/include/luajit-2.0 && make install
+
+if [[ ${ARCH} == "ppc64le" ]];then
+  LUA_DIR=/usr/include/luajit-2.1
+else
+  LUA_DIR=/usr/include/luajit-2.0
+fi
+make LUA_INCLUDE_DIR=${LUA_DIR} && make install
 
 echo "Installing lua-resty-http module"
 # copy lua module
@@ -195,6 +214,10 @@ apt-mark unmarkauto \
   geoip-bin \
   openssl
 
+if [[ ${ARCH} == "ppc64le" ]]; then
+  apt-mark unmarkauto liblua5.1-0
+fi
+
 apt-get remove -y --purge \
   build-essential \
   gcc-5 \