Add Alpine variant

.travis.yml

@@ -1,18 +1,22 @@
 language: bash
 services: docker
 
+env:
+  - VARIANT=debian
+  - VARIANT=alpine
+
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images
 
 before_script:
   - env | sort
-  - image='rabbitmq'
+  - image="rabbitmq:$VARIANT"
 
 script:
-  - docker build -t "$image" .
+  - docker build -t "$image" "$VARIANT"
   - ~/official-images/test/run.sh "$image"
-  - docker build -t "$image:management" management
-  - ~/official-images/test/run.sh "$image:management"
+  - docker build -t "${image}-management" "$VARIANT/management"
+  - ~/official-images/test/run.sh "${image}-management"
 
 after_script:
   - docker images

alpine/Dockerfile

@@ -0,0 +1,92 @@
+FROM alpine:3.5
+
+# add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
+RUN addgroup -S rabbitmq && adduser -S -h /var/lib/rabbitmq -G rabbitmq rabbitmq
+
+# grab su-exec for easy step-down from root
+RUN apk add --no-cache 'su-exec>=0.2'
+
+RUN apk add --no-cache \
+# Bash for docker-entrypoint
+		bash \
+# Erlang for RabbitMQ
+		erlang-asn1 \
+		erlang-hipe \
+		erlang-crypto \
+		erlang-eldap \
+		erlang-inets \
+		erlang-mnesia \
+		erlang \
+		erlang-os-mon \
+		erlang-public-key \
+		erlang-sasl \
+		erlang-ssl \
+		erlang-syntax-tools \
+		erlang-xmerl
+
+# get logs to stdout (thanks @dumbbell for pushing this upstream! :D)
+ENV RABBITMQ_LOGS=- RABBITMQ_SASL_LOGS=-
+# https://github.com/rabbitmq/rabbitmq-server/commit/53af45bf9a162dec849407d114041aad3d84feaf
+
+ENV RABBITMQ_HOME /opt/rabbitmq
+ENV PATH $RABBITMQ_HOME/sbin:$PATH
+
+# https://www.rabbitmq.com/install-generic-unix.html
+ENV GPG_KEY 0A9AF2115F4687BD29803A206B73A36E6026DFCA
+
+ENV RABBITMQ_VERSION 3.6.6
+
+RUN set -ex; \
+	\
+	apk add --no-cache --virtual .build-deps \
+		ca-certificates \
+		gnupg \
+		libressl \
+		tar \
+		xz \
+	; \
+	\
+	wget -O rabbitmq-server.tar.xz "https://www.rabbitmq.com/releases/rabbitmq-server/v${RABBITMQ_VERSION}/rabbitmq-server-generic-unix-${RABBITMQ_VERSION}.tar.xz"; \
+	wget -O rabbitmq-server.tar.xz.asc "https://www.rabbitmq.com/releases/rabbitmq-server/v${RABBITMQ_VERSION}/rabbitmq-server-generic-unix-${RABBITMQ_VERSION}.tar.xz.asc"; \
+	\
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify rabbitmq-server.tar.xz.asc rabbitmq-server.tar.xz; \
+	rm -r "$GNUPGHOME" rabbitmq-server.tar.xz.asc; \
+	\
+	mkdir -p "$RABBITMQ_HOME"; \
+	tar \
+		--extract \
+		--verbose \
+		--file rabbitmq-server.tar.xz \
+		--directory "$RABBITMQ_HOME" \
+		--strip-components 1 \
+	; \
+	rm rabbitmq-server.tar.xz; \
+	\
+# update SYS_PREFIX (first making sure it's set to what we expect it to be)
+	grep -qE '^SYS_PREFIX=\$\{RABBITMQ_HOME\}$' "$RABBITMQ_HOME/sbin/rabbitmq-defaults"; \
+	sed -ri 's!^(SYS_PREFIX=).*$!\1!g' "$RABBITMQ_HOME/sbin/rabbitmq-defaults"; \
+	grep -qE '^SYS_PREFIX=$' "$RABBITMQ_HOME/sbin/rabbitmq-defaults"; \
+	\
+	apk del .build-deps
+
+# set home so that any `--user` knows where to put the erlang cookie
+ENV HOME /var/lib/rabbitmq
+
+RUN mkdir -p /var/lib/rabbitmq /etc/rabbitmq \
+	&& echo '[ { rabbit, [ { loopback_users, [ ] } ] } ].' > /etc/rabbitmq/rabbitmq.config \
+	&& chown -R rabbitmq:rabbitmq /var/lib/rabbitmq /etc/rabbitmq \
+	&& chmod -R 777 /var/lib/rabbitmq /etc/rabbitmq
+VOLUME /var/lib/rabbitmq
+
+# add a symlink to the .erlang.cookie in /root so we can "docker exec rabbitmqctl ..." without gosu
+RUN ln -sf /var/lib/rabbitmq/.erlang.cookie /root/
+
+RUN ln -sf "$RABBITMQ_HOME/plugins" /plugins
+
+COPY docker-entrypoint.sh /usr/local/bin/
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+EXPOSE 4369 5671 5672 25672
+CMD ["rabbitmq-server"]