add postgres:9.5-alpine variant

build it from source

9.5/alpine/Dockerfile

@@ -0,0 +1,81 @@
+# vim:set ft=dockerfile:
+FROM alpine:3.3
+
+# explicitly set user/group IDs
+#RUN adduser -S -G postgres -u 999 postgres
+
+# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
+ENV LANG en_US.utf8
+
+RUN mkdir /docker-entrypoint-initdb.d
+
+ENV PG_MAJOR 9.5
+ENV PG_VERSION 9.5.0
+ENV PG_SHA256 f1c0d3a1a8aa8c92738cab0153fbfffcc4d4158b3fee84f7aa6bfea8283978bc
+
+
+# configure options taken from:
+# https://anonscm.debian.org/cgit/pkg-postgresql/postgresql.git/tree/debian/rules?h=9.5
+RUN set -x \
+&& apk add --no-cache --virtual .build-deps \
+su-exec \
+bash \
+bison \
+curl \
+flex \
+gcc \
+krb5-dev \
+libc-dev \
+libedit-dev \
+libxml2-dev \
+libxslt-dev \
+make \
+openldap-dev \
+openssl-dev \
+perl \
+perl-dev \
+python3-dev \
+tcl-dev \
+util-linux-dev \
+zlib-dev \
+&& curl -fSL "https://ftp.postgresql.org/pub/source/v$PG_VERSION/postgresql-$PG_VERSION.tar.bz2" -o postgresql.tar.bz2 \
+&& echo "$PG_SHA256 postgresql.tar.bz2" | sha256sum -c - \
+&& mkdir -p /usr/src \
+&& tar -jxf postgresql.tar.bz2 -C /usr/src \
+&& rm postgresql.tar.bz2 \
+&& cd /usr/src/postgresql-$PG_VERSION \
+&& ./configure \
+--enable-integer-datetimes \
+--enable-tap-tests \
+--enable-thread-safety \
+--prefix=/usr/local \
+--with-libedit-preferred \
+--with-openssl \
+--with-uuid=e2fs \
+&& make -j$(getconf _NPROCESSORS_ONLN) world \
+&& make install-world \
+&& make -C contrib install \
+&& runDeps="$( \
+scanelf --needed --nobanner --recursive /usr/local \
+| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
+| sort -u \
+| xargs -r apk info --installed \
+| sort -u \
+)" \
+&& apk add --virtual .postgresql-rundeps $runDeps su-exec \
+&& apk del .build-deps \
+&& cd / && rm -rf /usr/src/postgresql-* /usr/local/include/* \
+&& find /usr/local -name '*.a' -delete
+
+RUN mkdir -p /var/run/postgresql && chown -R postgres /var/run/postgresql
+
+ENV PATH /usr/lib/postgresql/$PG_MAJOR/bin:$PATH
+ENV PGDATA /var/lib/postgresql/data
+VOLUME /var/lib/postgresql/data
+
+COPY docker-entrypoint.sh /
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+
+EXPOSE 5432
+CMD ["postgres"]

9.5/alpine/docker-entrypoint.sh

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+#!/bin/sh -e
+
+set_listen_addresses() {
+sedEscapedValue="$(echo "$1" | sed 's/[\/&]/\\&/g')"
+sed -ri "s/^#?(listen_addresses\s*=\s*)\S+/\1'$sedEscapedValue'/" "$PGDATA/postgresql.conf"
+}
+
+if [ "$1" = 'postgres' ]; then
+mkdir -p "$PGDATA"
+chmod 700 "$PGDATA"
+chown -R postgres "$PGDATA"
+
+chmod g+s /var/run/postgresql
+chown -R postgres /var/run/postgresql
+
+# look specifically for PG_VERSION, as it is expected in the DB dir
+if [ ! -s "$PGDATA/PG_VERSION" ]; then
+su-exec postgres initdb
+
+# check password first so we can output the warning before postgres
+# messes it up
+if [ "$POSTGRES_PASSWORD" ]; then
+pass="PASSWORD '$POSTGRES_PASSWORD'"
+authMethod=md5
+else
+# The - option suppresses leading tabs but *not* spaces. :)
+cat >&2 <<-'EOWARN'
+****************************************************
+WARNING: No password has been set for the database.
+ This will allow anyone with access to the
+ Postgres port to access your database. In
+ Docker's default configuration, this is
+ effectively any other container on the same
+ system.
+
+ Use "-e POSTGRES_PASSWORD=password" to set
+ it in "docker run".
+****************************************************
+EOWARN
+
+pass=
+authMethod=trust
+fi
+
+{ echo; echo "host all all 0.0.0.0/0 $authMethod"; } >> "$PGDATA/pg_hba.conf"
+
+# internal start of server in order to allow set-up using psql-client
+# does not listen on TCP/IP and waits until start finishes
+su-exec postgres pg_ctl -D "$PGDATA" \
+-o "-c listen_addresses=''" \
+-w start
+
+: ${POSTGRES_USER:=postgres}
+: ${POSTGRES_DB:=$POSTGRES_USER}
+export POSTGRES_USER POSTGRES_DB
+
+if [ "$POSTGRES_DB" != 'postgres' ]; then
+psql --username postgres <<-EOSQL
+CREATE DATABASE "$POSTGRES_DB" ;
+EOSQL
+echo
+fi
+
+if [ "$POSTGRES_USER" = 'postgres' ]; then
+op='ALTER'
+else
+op='CREATE'
+fi
+
+psql --username postgres <<-EOSQL
+$op USER "$POSTGRES_USER" WITH SUPERUSER $pass ;
+EOSQL
+echo
+
+echo
+for f in /docker-entrypoint-initdb.d/*; do
+case "$f" in
+*.sh) echo "$0: running $f"; . "$f" ;;
+*.sql) echo "$0: running $f"; psql --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" < "$f" && echo ;;
+*) echo "$0: ignoring $f" ;;
+esac
+echo
+done
+
+su-exec postgres pg_ctl -D "$PGDATA" -m fast -w stop
+set_listen_addresses '*'
+
+echo
+echo 'PostgreSQL init process complete; ready for start up.'
+echo
+fi
+
+exec su-exec postgres "$@"
+fi
+
+exec "$@"