Add alpine variant

Also, shrink the diff between "logstash" and "elasticsearch".

.travis.yml

@@ -2,9 +2,10 @@ language: bash
 services: docker
 
 env:
-  - VERSION=5
-  - VERSION=2.4
-  - VERSION=1.7
+  - VERSION=5 VARIANT=
+  - VERSION=5 VARIANT=alpine
+  - VERSION=2.4 VARIANT=
+  - VERSION=1.7 VARIANT=
 
 install:
   - git clone https://github.com/docker-library/official-images.git ~/official-images

1.7/Dockerfile

@@ -22,6 +22,7 @@ RUN set -x \
 	&& echo 'deb http://packages.elasticsearch.org/elasticsearch/1.7/debian stable main' > /etc/apt/sources.list.d/elasticsearch.list
 
 ENV ELASTICSEARCH_VERSION 1.7.6
+ENV ELASTICSEARCH_DEB_VERSION 1.7.6
 
 RUN set -x \
 	\
@@ -30,7 +31,7 @@ RUN set -x \
 	&& dpkg-divert --rename /usr/lib/sysctl.d/elasticsearch.conf \
 	\
 	&& apt-get update \
-	&& apt-get install -y --no-install-recommends elasticsearch=$ELASTICSEARCH_VERSION \
+	&& apt-get install -y --no-install-recommends "elasticsearch=$ELASTICSEARCH_DEB_VERSION" \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV PATH /usr/share/elasticsearch/bin:$PATH

2.4/Dockerfile

@@ -22,6 +22,7 @@ RUN set -x \
 	&& echo 'deb http://packages.elasticsearch.org/elasticsearch/2.x/debian stable main' > /etc/apt/sources.list.d/elasticsearch.list
 
 ENV ELASTICSEARCH_VERSION 2.4.2
+ENV ELASTICSEARCH_DEB_VERSION 2.4.2
 
 RUN set -x \
 	\
@@ -30,7 +31,7 @@ RUN set -x \
 	&& dpkg-divert --rename /usr/lib/sysctl.d/elasticsearch.conf \
 	\
 	&& apt-get update \
-	&& apt-get install -y --no-install-recommends elasticsearch=$ELASTICSEARCH_VERSION \
+	&& apt-get install -y --no-install-recommends "elasticsearch=$ELASTICSEARCH_DEB_VERSION" \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV PATH /usr/share/elasticsearch/bin:$PATH

5/Dockerfile

@@ -22,6 +22,7 @@ RUN set -x \
 	&& echo 'deb https://artifacts.elastic.co/packages/5.x/apt stable main' > /etc/apt/sources.list.d/elasticsearch.list
 
 ENV ELASTICSEARCH_VERSION 5.1.1
+ENV ELASTICSEARCH_DEB_VERSION 5.1.1
 
 RUN set -x \
 	\
@@ -30,7 +31,7 @@ RUN set -x \
 	&& dpkg-divert --rename /usr/lib/sysctl.d/elasticsearch.conf \
 	\
 	&& apt-get update \
-	&& apt-get install -y --no-install-recommends elasticsearch=$ELASTICSEARCH_VERSION \
+	&& apt-get install -y --no-install-recommends "elasticsearch=$ELASTICSEARCH_DEB_VERSION" \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV PATH /usr/share/elasticsearch/bin:$PATH

5/alpine/Dockerfile

@@ -0,0 +1,60 @@
+FROM openjdk:8-jre-alpine
+
+# ensure elasticsearch user exists
+RUN addgroup -S elasticsearch && adduser -S -G elasticsearch elasticsearch
+
+# grab su-exec for easy step-down from root
+# and bash for "bin/elasticsearch" among others
+RUN apk add --no-cache 'su-exec>=0.2' bash
+
+# https://artifacts.elastic.co/GPG-KEY-elasticsearch
+ENV GPG_KEY 46095ACC8548582C1A2699A9D27D666CD88E42B4
+
+ENV ELASTICSEARCH_VERSION 5.1.1
+
+ENV PATH /usr/share/elasticsearch/bin:$PATH
+WORKDIR /usr/share/elasticsearch
+
+RUN set -ex; \
+	\
+	apk add --no-cache --virtual .fetch-deps \
+		ca-certificates \
+		gnupg \
+		openssl \
+		tar \
+	; \
+	\
+	wget -O elasticsearch.tar.gz "https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ELASTICSEARCH_VERSION}.tar.gz"; \
+	\
+	wget -O elasticsearch.tar.gz.asc "https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ELASTICSEARCH_VERSION}.tar.gz.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify elasticsearch.tar.gz.asc elasticsearch.tar.gz; \
+	rm -r "$GNUPGHOME" elasticsearch.tar.gz.asc; \
+	\
+	tar -xf elasticsearch.tar.gz --strip-components=1; \
+	rm elasticsearch.tar.gz; \
+	\
+	apk del .fetch-deps; \
+	\
+	for path in \
+		./data \
+		./logs \
+		./config \
+		./config/scripts \
+	; do \
+		mkdir -p "$path"; \
+		chown -R elasticsearch:elasticsearch "$path"; \
+	done; \
+	\
+	elasticsearch --version
+
+COPY config ./config
+
+VOLUME /usr/share/elasticsearch/data
+
+COPY docker-entrypoint.sh /
+
+EXPOSE 9200 9300
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["elasticsearch"]

5/alpine/config/elasticsearch.yml

@@ -0,0 +1,5 @@
+network.host: 0.0.0.0
+
+# this value is required because we set "network.host"
+# be sure to modify it appropriately for a production cluster deployment
+discovery.zen.minimum_master_nodes: 1

5/alpine/config/log4j2.properties

@@ -0,0 +1,9 @@
+status = error
+
+appender.console.type = Console
+appender.console.name = console
+appender.console.layout.type = PatternLayout
+appender.console.layout.pattern = [%d{ISO8601}][%-5p][%-25c{1.}] %marker%m%n
+
+rootLogger.level = info
+rootLogger.appenderRef.console.ref = console

5/alpine/docker-entrypoint.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -e
+
+# Add elasticsearch as command if needed
+if [ "${1:0:1}" = '-' ]; then
+	set -- elasticsearch "$@"
+fi
+
+# Drop root privileges if we are running elasticsearch
+# allow the container to be started with `--user`
+if [ "$1" = 'elasticsearch' -a "$(id -u)" = '0' ]; then
+	# Change the ownership of /usr/share/elasticsearch/data to elasticsearch
+	chown -R elasticsearch:elasticsearch /usr/share/elasticsearch/data
+
+	set -- su-exec elasticsearch "$@"
+	#exec su-exec elasticsearch "$BASH_SOURCE" "$@"
+fi
+
+# As argument is not related to elasticsearch,
+# then assume that user wants to run his own process,
+# for example a `bash` shell to explore this image
+exec "$@"

Dockerfile-alpine.template

@@ -0,0 +1,60 @@
+FROM openjdk:8-jre-alpine
+
+# ensure elasticsearch user exists
+RUN addgroup -S elasticsearch && adduser -S -G elasticsearch elasticsearch
+
+# grab su-exec for easy step-down from root
+# and bash for "bin/elasticsearch" among others
+RUN apk add --no-cache 'su-exec>=0.2' bash
+
+# https://artifacts.elastic.co/GPG-KEY-elasticsearch
+ENV GPG_KEY 46095ACC8548582C1A2699A9D27D666CD88E42B4
+
+ENV ELASTICSEARCH_VERSION %%ELASTICSEARCH_VERSION%%
+
+ENV PATH /usr/share/elasticsearch/bin:$PATH
+WORKDIR /usr/share/elasticsearch
+
+RUN set -ex; \
+	\
+	apk add --no-cache --virtual .fetch-deps \
+		ca-certificates \
+		gnupg \
+		openssl \
+		tar \
+	; \
+	\
+	wget -O elasticsearch.tar.gz "https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ELASTICSEARCH_VERSION}.tar.gz"; \
+	\
+	wget -O elasticsearch.tar.gz.asc "https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-${ELASTICSEARCH_VERSION}.tar.gz.asc"; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY"; \
+	gpg --batch --verify elasticsearch.tar.gz.asc elasticsearch.tar.gz; \
+	rm -r "$GNUPGHOME" elasticsearch.tar.gz.asc; \
+	\
+	tar -xf elasticsearch.tar.gz --strip-components=1; \
+	rm elasticsearch.tar.gz; \
+	\
+	apk del .fetch-deps; \
+	\
+	for path in \
+		./data \
+		./logs \
+		./config \
+		./config/scripts \
+	; do \
+		mkdir -p "$path"; \
+		chown -R elasticsearch:elasticsearch "$path"; \
+	done; \
+	\
+	elasticsearch --version
+
+COPY config ./config
+
+VOLUME /usr/share/elasticsearch/data
+
+COPY docker-entrypoint.sh /
+
+EXPOSE 9200 9300
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["elasticsearch"]

Dockerfile.template → Dockerfile-debian.template

@@ -19,9 +19,10 @@ RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 46095ACC85485
 # https://www.elastic.co/guide/en/elasticsearch/reference/5.0/deb.html
 RUN set -x \
 	&& apt-get update && apt-get install -y --no-install-recommends apt-transport-https && rm -rf /var/lib/apt/lists/* \
-	&& echo 'deb %%ELASTICSEARCH_REPO_BASE%% stable main' > /etc/apt/sources.list.d/elasticsearch.list
+	&& echo 'deb %%ELASTICSEARCH_DEB_REPO%% stable main' > /etc/apt/sources.list.d/elasticsearch.list
 
 ENV ELASTICSEARCH_VERSION %%ELASTICSEARCH_VERSION%%
+ENV ELASTICSEARCH_DEB_VERSION %%ELASTICSEARCH_DEB_VERSION%%
 
 RUN set -x \
 	\
@@ -30,7 +31,7 @@ RUN set -x \
 	&& dpkg-divert --rename /usr/lib/sysctl.d/elasticsearch.conf \
 	\
 	&& apt-get update \
-	&& apt-get install -y --no-install-recommends elasticsearch=$ELASTICSEARCH_VERSION \
+	&& apt-get install -y --no-install-recommends "elasticsearch=$ELASTICSEARCH_DEB_VERSION" \
 	&& rm -rf /var/lib/apt/lists/*
 
 ENV PATH /usr/share/elasticsearch/bin:$PATH

generate-stackbrew-library.sh

@@ -76,4 +76,20 @@ for version in "${versions[@]}"; do
 		GitCommit: $commit
 		Directory: $version
 	EOE
+
+	for variant in alpine; do
+		[ -f "$version/$variant/Dockerfile" ] || continue
+
+		commit="$(dirCommit "$version/$variant")"
+
+		variantAliases=( "${versionAliases[@]/%/-$variant}" )
+		variantAliases=( "${variantAliases[@]//latest-/}" )
+
+		echo
+		cat <<-EOE
+			Tags: $(join ', ' "${variantAliases[@]}")
+			GitCommit: $commit
+			Directory: $version/$variant
+		EOE
+	done
 done

update.sh

@@ -11,38 +11,66 @@ versions=( "${versions[@]%/}" )
 
 travisEnv=
 for version in "${versions[@]}"; do
-	travisEnv='\n  - VERSION='"$version$travisEnv"
-
 	rcVersion="${version%-rc}"
 
 	majorVersion="${rcVersion%%.*}"
 	aptBucket="${majorVersion}.x"
 	if [ "$rcVersion" != "$version" ]; then
 		aptBucket+='-prerelease'
 	fi
-	repoBase=
+	debRepo=
 	if [ "$majorVersion" -ge 5 ]; then
-		repoBase="https://artifacts.elastic.co/packages/$aptBucket/apt"
+		debRepo="https://artifacts.elastic.co/packages/$aptBucket/apt"
 	elif [ "$majorVersion" -ge 2 ]; then
-		repoBase="http://packages.elasticsearch.org/elasticsearch/$aptBucket/debian"
+		debRepo="http://packages.elasticsearch.org/elasticsearch/$aptBucket/debian"
 	else
-		repoBase="http://packages.elasticsearch.org/elasticsearch/$rcVersion/debian"
+		debRepo="http://packages.elasticsearch.org/elasticsearch/$rcVersion/debian"
 	fi
 
-	fullVersion="$(curl -fsSL "$repoBase/dists/stable/main/binary-amd64/Packages" | awk -F ': ' '$1 == "Package" { pkg = $2 } pkg == "elasticsearch" && $1 == "Version" && $2 ~ /^([0-9]+:)?'"$rcVersion"'/ { print $2 }' | sort -rV | head -n1)"
+	fullVersion="$(curl -fsSL "$debRepo/dists/stable/main/binary-amd64/Packages" | awk -F ': ' '$1 == "Package" { pkg = $2 } pkg == "elasticsearch" && $1 == "Version" && $2 ~ /^([0-9]+:)?'"$rcVersion"'/ { print $2 }' | sort -rV | head -n1)"
 	if [ -z "$fullVersion" ]; then
 		echo >&2 "warning: cannot find full version for $version"
 		continue
 	fi
+	# convert "1:5.0.2-1" over to "5.0.2"
+	plainVersion="${fullVersion%%-*}" # strip non-upstream-version
+	plainVersion="${plainVersion##*:}" # strip epoch
+	tilde='~'; plainVersion="${plainVersion//$tilde/-}" # replace '~' with '-'
 
 	(
 		set -x
 		cp docker-entrypoint.sh "$version/"
 		sed '
-			s/%%ELASTICSEARCH_VERSION%%/'"$fullVersion"'/g;
-			s!%%ELASTICSEARCH_REPO_BASE%%!'"$repoBase"'!g;
-		' Dockerfile.template > "$version/Dockerfile"
+			s!%%ELASTICSEARCH_VERSION%%!'"$plainVersion"'!g;
+			s!%%ELASTICSEARCH_DEB_REPO%%!'"$debRepo"'!g;
+			s!%%ELASTICSEARCH_DEB_VERSION%%!'"$fullVersion"'!g;
+		' Dockerfile-debian.template > "$version/Dockerfile"
 	)
+
+	if [ -d "$version/alpine" ]; then
+		tarball="$tarballUrlBase/logstash/logstash-${plainVersion}.tar.gz"
+		tarballAsc="${tarball}.asc"
+		if ! wget --quiet --spider "$tarballAsc"; then
+			tarballAsc=
+		fi
+		tarballSha1=
+		for sha1Url in "${tarball}.sha1" "${tarball}.sha1.txt"; do
+			if sha1="$(wget -qO- "$sha1Url")"; then
+				tarballSha1="${sha1%% *}"
+				break
+			fi
+		done
+		(
+			set -x
+			cp docker-entrypoint.sh "$version/alpine/"
+			sed -i 's/gosu/su-exec/g' "$version/alpine/docker-entrypoint.sh"
+			sed \
+				-e 's!%%ELASTICSEARCH_VERSION%%!'"$plainVersion"'!g' \
+				Dockerfile-alpine.template > "$version/alpine/Dockerfile"
+		)
+		travisEnv='\n  - VERSION='"$version VARIANT=alpine$travisEnv"
+	fi
+	travisEnv='\n  - VERSION='"$version VARIANT=$travisEnv"
 done
 
 travis="$(awk -v 'RS=\n\n' '$1 == "env:" { $0 = "env:'"$travisEnv"'" } { printf "%s%s", $0, RS }' .travis.yml)"