Configure UserAgent for apt in DockerfileForPlus

Author: pleshakov

Makefile

@@ -38,7 +38,7 @@ endif
 
 container: test nginx-ingress certificate-and-key
 	cp $(DOCKERFILEPATH)/$(DOCKERFILE) ./Dockerfile
-	docker build $(DOCKER_BUILD_OPTIONS) -f Dockerfile -t $(PREFIX):$(TAG) .
+	docker build $(DOCKER_BUILD_OPTIONS) --build-arg IC_VERSION=$(VERSION)-$(GIT_COMMIT) -f Dockerfile -t $(PREFIX):$(TAG) .
 
 push: container
 ifeq ($(PUSH_TO_GCR),1)

build/DockerfileForPlus

@@ -3,6 +3,7 @@ FROM debian:stretch-slim
 LABEL maintainer="NGINX Docker Maintainers <docker-maint@nginx.com>"
 
 ENV NGINX_PLUS_VERSION 17-1~stretch
+ARG IC_VERSION
 
 # Download certificate and key from the customer portal (https://cs.nginx.com)
 # and copy to the build context
@@ -33,6 +34,7 @@ RUN set -x \
   && echo "Acquire::https::plus-pkgs.nginx.com::Verify-Host \"true\";" >> /etc/apt/apt.conf.d/90nginx \
   && echo "Acquire::https::plus-pkgs.nginx.com::SslCert     \"/etc/ssl/nginx/nginx-repo.crt\";" >> /etc/apt/apt.conf.d/90nginx \
   && echo "Acquire::https::plus-pkgs.nginx.com::SslKey      \"/etc/ssl/nginx/nginx-repo.key\";" >> /etc/apt/apt.conf.d/90nginx \
+  && echo "Acquire::https::plus-pkgs.nginx.com::User-Agent  \"k8s-ic-$IC_VERSION-apt\";" >> /etc/apt/apt.conf.d/90nginx \
   && printf "deb https://plus-pkgs.nginx.com/debian stretch nginx-plus\n" > /etc/apt/sources.list.d/nginx-plus.list \
   && apt-get update && apt-get install -y nginx-plus=${NGINX_PLUS_VERSION} \
   && apt-get remove --purge --auto-remove -y gnupg1 \