add wireguard

Signed-off-by: Jess Frazelle <acidburn@google.com>

wireguard/Dockerfile

@@ -0,0 +1,37 @@
+# Usage:
+#
+# (this uses a custom kernel module hence the mounts)
+# docker run --rm -it \
+# 	--name wireguard \
+# 	--privileged \
+# 	-v /lib/modules:/lib/modules:ro \
+# 	-v /usr/src:/usr/src:ro \
+# 	r.j3ss.co/wireguard
+#
+FROM alpine:latest
+LABEL maintainer "Jessie Frazelle <jess@linux.com>"
+
+RUN apk add --no-cache \
+	build-base \
+	ca-certificates \
+	libmnl-dev
+
+# https://git.zx2c4.com/WireGuard/refs/
+ENV WIREGUARD_VERSION 0.0.20170324
+
+RUN set -x \
+	&& apk add --no-cache --virtual .build-deps \
+		git \
+	&& git clone --depth 1 --branch "${WIREGUARD_VERSION}" https://git.zx2c4.com/WireGuard.git /wireguard \
+	&& ( \
+		cd /wireguard/src \
+		&& make tools \
+		&& make -C tools install \
+		&& make -C tools clean \
+	) \
+	&& apk del .build-deps
+
+COPY entrypoint.sh /usr/local/bin/entrypoint.sh
+
+ENTRYPOINT [ "/usr/local/bin/entrypoint.sh" ]
+CMD [ "wg" ]

wireguard/entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -e
+
+(
+cd /wireguard/src
+make module
+make module-install
+make clean
+)
+
+exec $@