support docker image build for arm32 and amd64 architecture

Closes #10

Author: sholzmayer

Dockerfile.arm32v7

@@ -0,0 +1,17 @@
+FROM ubuntu:xenial
+
+MAINTAINER Simon Holzmayer <[email protected]>
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get -q -y update \
+ && apt-get -q -y -o "DPkg::Options::=--force-confold" -o "DPkg::Options::=--force-confdef" install apt-utils \
+ && apt-get -q -y -o "DPkg::Options::=--force-confold" -o "DPkg::Options::=--force-confdef" dist-upgrade \
+ && apt-get -q -y -o "DPkg::Options::=--force-confold" -o "DPkg::Options::=--force-confdef" install isc-dhcp-server man \
+ && apt-get -q -y autoremove \
+ && apt-get -q -y clean \
+ && rm -rf /var/lib/apt/lists/*
+
+COPY util/dumb-init_1.2.0_armhf /usr/bin/dumb-init
+COPY util/entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

build

@@ -1,2 +1,8 @@
 #!/bin/bash
-docker build -t networkboot/dhcpd "$@" $(dirname $0)
+MACHINE_TYPE=`uname -m`
+
+if [ ${MACHINE_TYPE} == 'x86_64' ]; then
+  docker build -t networkboot/dhcpd "$@" $(dirname $0)
+elif [ ${MACHINE_TYPE} == 'armv7l' ]; then
+  docker build -t networkboot/dhcpd:arm32v7 "$@" $(dirname $0) -f Dockerfile.arm32v7
+fi