Add new 11 series beta

.travis.yml

@@ -14,6 +14,9 @@ env:
   - VERSION=9.3
   - VERSION=9.3 FORCE_DEB_BUILD=1
   - VERSION=9.3 VARIANT=alpine
+  - VERSION=11
+  - VERSION=11 FORCE_DEB_BUILD=1
+  - VERSION=11 VARIANT=alpine
   - VERSION=10
   - VERSION=10 FORCE_DEB_BUILD=1
   - VERSION=10 VARIANT=alpine

11/Dockerfile

@@ -0,0 +1,148 @@
+# vim:set ft=dockerfile:
+FROM debian:stretch-slim
+
+RUN set -ex; \
+	if ! command -v gpg > /dev/null; then \
+		apt-get update; \
+		apt-get install -y --no-install-recommends \
+			gnupg \
+			dirmngr \
+		; \
+		rm -rf /var/lib/apt/lists/*; \
+	fi
+
+# explicitly set user/group IDs
+RUN groupadd -r postgres --gid=999 && useradd -r -g postgres --uid=999 postgres
+
+# grab gosu for easy step-down from root
+ENV GOSU_VERSION 1.10
+RUN set -x \
+	&& apt-get update && apt-get install -y --no-install-recommends ca-certificates wget && rm -rf /var/lib/apt/lists/* \
+	&& wget -O /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture)" \
+	&& wget -O /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/$GOSU_VERSION/gosu-$(dpkg --print-architecture).asc" \
+	&& export GNUPGHOME="$(mktemp -d)" \
+	&& gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
+	&& gpg --batch --verify /usr/local/bin/gosu.asc /usr/local/bin/gosu \
+	&& rm -rf "$GNUPGHOME" /usr/local/bin/gosu.asc \
+	&& chmod +x /usr/local/bin/gosu \
+	&& gosu nobody true \
+	&& apt-get purge -y --auto-remove ca-certificates wget
+
+# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
+RUN set -eux; \
+	if [ -f /etc/dpkg/dpkg.cfg.d/docker ]; then \
+# if this file exists, we're likely in "debian:xxx-slim", and locales are thus being excluded so we need to remove that exclusion (since we need locales)
+		grep -q '/usr/share/locale' /etc/dpkg/dpkg.cfg.d/docker; \
+		sed -ri '/\/usr\/share\/locale/d' /etc/dpkg/dpkg.cfg.d/docker; \
+		! grep -q '/usr/share/locale' /etc/dpkg/dpkg.cfg.d/docker; \
+	fi; \
+	apt-get update; apt-get install -y locales; rm -rf /var/lib/apt/lists/*; \
+	localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8
+ENV LANG en_US.utf8
+
+# install "nss_wrapper" in case we need to fake "/etc/passwd" and "/etc/group" (especially for OpenShift)
+# https://github.com/docker-library/postgres/issues/359
+# https://cwrap.org/nss_wrapper.html
+RUN set -eux; \
+	apt-get update; \
+	apt-get install -y --no-install-recommends libnss-wrapper; \
+	rm -rf /var/lib/apt/lists/*
+
+RUN mkdir /docker-entrypoint-initdb.d
+
+RUN set -ex; \
+# pub   4096R/ACCC4CF8 2011-10-13 [expires: 2019-07-02]
+#       Key fingerprint = B97B 0AFC AA1A 47F0 44F2  44A0 7FCC 7D46 ACCC 4CF8
+# uid                  PostgreSQL Debian Repository
+	key='B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8'; \
+	export GNUPGHOME="$(mktemp -d)"; \
+	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
+	gpg --export "$key" > /etc/apt/trusted.gpg.d/postgres.gpg; \
+	rm -rf "$GNUPGHOME"; \
+	apt-key list
+
+ENV PG_MAJOR 11
+ENV PG_VERSION 11~beta1-2.pgdg90+1
+
+RUN set -ex; \
+	\
+	dpkgArch="$(dpkg --print-architecture)"; \
+	case "$dpkgArch" in \
+		amd64|i386|ppc64el) \
+# arches officialy built by upstream
+			echo "deb http://apt.postgresql.org/pub/repos/apt/ stretch-pgdg main $PG_MAJOR" > /etc/apt/sources.list.d/pgdg.list; \
+			apt-get update; \
+			;; \
+		*) \
+# we're on an architecture upstream doesn't officially build for
+# let's build binaries from their published source packages
+			echo "deb-src http://apt.postgresql.org/pub/repos/apt/ stretch-pgdg main $PG_MAJOR" > /etc/apt/sources.list.d/pgdg.list; \
+			\
+			tempDir="$(mktemp -d)"; \
+			cd "$tempDir"; \
+			\
+			savedAptMark="$(apt-mark showmanual)"; \
+			\
+# build .deb files from upstream's source packages (which are verified by apt-get)
+			apt-get update; \
+			apt-get build-dep -y \
+				postgresql-common pgdg-keyring \
+				"postgresql-$PG_MAJOR=$PG_VERSION" \
+			; \
+			DEB_BUILD_OPTIONS="nocheck parallel=$(nproc)" \
+				apt-get source --compile \
+					postgresql-common pgdg-keyring \
+					"postgresql-$PG_MAJOR=$PG_VERSION" \
+			; \
+# we don't remove APT lists here because they get re-downloaded and removed later
+			\
+# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
+# (which is done after we install the built packages so we don't have to redownload any overlapping dependencies)
+			apt-mark showmanual | xargs apt-mark auto > /dev/null; \
+			apt-mark manual $savedAptMark; \
+			\
+# create a temporary local APT repo to install from (so that dependency resolution can be handled by APT, as it should be)
+			ls -lAFh; \
+			dpkg-scanpackages . > Packages; \
+			grep '^Package: ' Packages; \
+			echo "deb [ trusted=yes ] file://$tempDir ./" > /etc/apt/sources.list.d/temp.list; \
+# work around the following APT issue by using "Acquire::GzipIndexes=false" (overriding "/etc/apt/apt.conf.d/docker-gzip-indexes")
+#   Could not open file /var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages - open (13: Permission denied)
+#   ...
+#   E: Failed to fetch store:/var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages  Could not open file /var/lib/apt/lists/partial/_tmp_tmp.ODWljpQfkE_._Packages - open (13: Permission denied)
+			apt-get -o Acquire::GzipIndexes=false update; \
+			;; \
+	esac; \
+	\
+	apt-get install -y postgresql-common; \
+	sed -ri 's/#(create_main_cluster) .*$/\1 = false/' /etc/postgresql-common/createcluster.conf; \
+	apt-get install -y \
+		"postgresql-$PG_MAJOR=$PG_VERSION" \
+	; \
+	\
+	rm -rf /var/lib/apt/lists/*; \
+	\
+	if [ -n "$tempDir" ]; then \
+# if we have leftovers from building, let's purge them (including extra, unnecessary build deps)
+		apt-get purge -y --auto-remove; \
+		rm -rf "$tempDir" /etc/apt/sources.list.d/temp.list; \
+	fi
+
+# make the sample config easier to munge (and "correct by default")
+RUN mv -v "/usr/share/postgresql/$PG_MAJOR/postgresql.conf.sample" /usr/share/postgresql/ \
+	&& ln -sv ../postgresql.conf.sample "/usr/share/postgresql/$PG_MAJOR/" \
+	&& sed -ri "s!^#?(listen_addresses)\s*=\s*\S+.*!\1 = '*'!" /usr/share/postgresql/postgresql.conf.sample
+
+RUN mkdir -p /var/run/postgresql && chown -R postgres:postgres /var/run/postgresql && chmod 2777 /var/run/postgresql
+
+ENV PATH $PATH:/usr/lib/postgresql/$PG_MAJOR/bin
+ENV PGDATA /var/lib/postgresql/data
+RUN mkdir -p "$PGDATA" && chown -R postgres:postgres "$PGDATA" && chmod 777 "$PGDATA" # this 777 will be replaced by 700 at runtime (allows semi-arbitrary "--user" values)
+VOLUME /var/lib/postgresql/data
+
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN ln -s usr/local/bin/docker-entrypoint.sh / # backwards compat
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+EXPOSE 5432
+CMD ["postgres"]

11/alpine/Dockerfile

@@ -0,0 +1,150 @@
+# vim:set ft=dockerfile:
+FROM alpine:3.7
+
+# alpine includes "postgres" user/group in base install
+#   /etc/passwd:22:postgres:x:70:70::/var/lib/postgresql:/bin/sh
+#   /etc/group:34:postgres:x:70:
+# the home directory for the postgres user, however, is not created by default
+# see https://github.com/docker-library/postgres/issues/274
+RUN set -ex; \
+	postgresHome="$(getent passwd postgres)"; \
+	postgresHome="$(echo "$postgresHome" | cut -d: -f6)"; \
+	[ "$postgresHome" = '/var/lib/postgresql' ]; \
+	mkdir -p "$postgresHome"; \
+	chown -R postgres:postgres "$postgresHome"
+
+# su-exec (gosu-compatible) is installed further down
+
+# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
+# alpine doesn't require explicit locale-file generation
+ENV LANG en_US.utf8
+
+RUN mkdir /docker-entrypoint-initdb.d
+
+ENV PG_MAJOR 11
+ENV PG_VERSION 11beta1
+ENV PG_SHA256 17889cbffdf4f07c193b16d76b2f9c45daa3f2ab225acd8d7f01521949cb1355
+
+RUN set -ex \
+	\
+	&& apk add --no-cache --virtual .fetch-deps \
+		ca-certificates \
+		openssl \
+		tar \
+	\
+	&& wget -O postgresql.tar.bz2 "https://ftp.postgresql.org/pub/source/v$PG_VERSION/postgresql-$PG_VERSION.tar.bz2" \
+	&& echo "$PG_SHA256 *postgresql.tar.bz2" | sha256sum -c - \
+	&& mkdir -p /usr/src/postgresql \
+	&& tar \
+		--extract \
+		--file postgresql.tar.bz2 \
+		--directory /usr/src/postgresql \
+		--strip-components 1 \
+	&& rm postgresql.tar.bz2 \
+	\
+	&& apk add --no-cache --virtual .build-deps \
+		bison \
+		coreutils \
+		dpkg-dev dpkg \
+		flex \
+		gcc \
+#		krb5-dev \
+		libc-dev \
+		libedit-dev \
+		libxml2-dev \
+		libxslt-dev \
+		make \
+#		openldap-dev \
+		openssl-dev \
+# configure: error: prove not found
+		perl-utils \
+# configure: error: Perl module IPC::Run is required to run TAP tests
+		perl-ipc-run \
+#		perl-dev \
+#		python-dev \
+#		python3-dev \
+#		tcl-dev \
+		util-linux-dev \
+		zlib-dev \
+	\
+	&& cd /usr/src/postgresql \
+# update "DEFAULT_PGSOCKET_DIR" to "/var/run/postgresql" (matching Debian)
+# see https://anonscm.debian.org/git/pkg-postgresql/postgresql.git/tree/debian/patches/51-default-sockets-in-var.patch?id=8b539fcb3e093a521c095e70bdfa76887217b89f
+	&& awk '$1 == "#define" && $2 == "DEFAULT_PGSOCKET_DIR" && $3 == "\"/tmp\"" { $3 = "\"/var/run/postgresql\""; print; next } { print }' src/include/pg_config_manual.h > src/include/pg_config_manual.h.new \
+	&& grep '/var/run/postgresql' src/include/pg_config_manual.h.new \
+	&& mv src/include/pg_config_manual.h.new src/include/pg_config_manual.h \
+	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
+# explicitly update autoconf config.guess and config.sub so they support more arches/libcs
+	&& wget -O config/config.guess 'https://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=7d3d27baf8107b630586c962c057e22149653deb' \
+	&& wget -O config/config.sub 'https://git.savannah.gnu.org/cgit/config.git/plain/config.sub?id=7d3d27baf8107b630586c962c057e22149653deb' \
+# configure options taken from:
+# https://anonscm.debian.org/cgit/pkg-postgresql/postgresql.git/tree/debian/rules?h=9.5
+	&& ./configure \
+		--build="$gnuArch" \
+# "/usr/src/postgresql/src/backend/access/common/tupconvert.c:105: undefined reference to `libintl_gettext'"
+#		--enable-nls \
+		--enable-integer-datetimes \
+		--enable-thread-safety \
+		--enable-tap-tests \
+# skip debugging info -- we want tiny size instead
+#		--enable-debug \
+		--disable-rpath \
+		--with-uuid=e2fs \
+		--with-gnu-ld \
+		--with-pgport=5432 \
+		--with-system-tzdata=/usr/share/zoneinfo \
+		--prefix=/usr/local \
+		--with-includes=/usr/local/include \
+		--with-libraries=/usr/local/lib \
+		\
+# these make our image abnormally large (at least 100MB larger), which seems uncouth for an "Alpine" (ie, "small") variant :)
+#		--with-krb5 \
+#		--with-gssapi \
+#		--with-ldap \
+#		--with-tcl \
+#		--with-perl \
+#		--with-python \
+#		--with-pam \
+		--with-openssl \
+		--with-libxml \
+		--with-libxslt \
+	&& make -j "$(nproc)" world \
+	&& make install-world \
+	&& make -C contrib install \
+	\
+	&& runDeps="$( \
+		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local \
+			| tr ',' '\n' \
+			| sort -u \
+			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
+	)" \
+	&& apk add --no-cache --virtual .postgresql-rundeps \
+		$runDeps \
+		bash \
+		su-exec \
+# tzdata is optional, but only adds around 1Mb to image size and is recommended by Django documentation:
+# https://docs.djangoproject.com/en/1.10/ref/databases/#optimizing-postgresql-s-configuration
+		tzdata \
+	&& apk del .fetch-deps .build-deps \
+	&& cd / \
+	&& rm -rf \
+		/usr/src/postgresql \
+		/usr/local/share/doc \
+		/usr/local/share/man \
+	&& find /usr/local -name '*.a' -delete
+
+# make the sample config easier to munge (and "correct by default")
+RUN sed -ri "s!^#?(listen_addresses)\s*=\s*\S+.*!\1 = '*'!" /usr/local/share/postgresql/postgresql.conf.sample
+
+RUN mkdir -p /var/run/postgresql && chown -R postgres:postgres /var/run/postgresql && chmod 2777 /var/run/postgresql
+
+ENV PGDATA /var/lib/postgresql/data
+RUN mkdir -p "$PGDATA" && chown -R postgres:postgres "$PGDATA" && chmod 777 "$PGDATA" # this 777 will be replaced by 700 at runtime (allows semi-arbitrary "--user" values)
+VOLUME /var/lib/postgresql/data
+
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN ln -s usr/local/bin/docker-entrypoint.sh / # backwards compat
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+EXPOSE 5432
+CMD ["postgres"]

11/alpine/docker-entrypoint.sh

@@ -0,0 +1,162 @@
+#!/usr/bin/env bash
+set -Eeo pipefail
+# TODO swap to -Eeuo pipefail above (after handling all potentially-unset variables)
+
+# usage: file_env VAR [DEFAULT]
+#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
+# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
+#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
+file_env() {
+	local var="$1"
+	local fileVar="${var}_FILE"
+	local def="${2:-}"
+	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
+		exit 1
+	fi
+	local val="$def"
+	if [ "${!var:-}" ]; then
+		val="${!var}"
+	elif [ "${!fileVar:-}" ]; then
+		val="$(< "${!fileVar}")"
+	fi
+	export "$var"="$val"
+	unset "$fileVar"
+}
+
+if [ "${1:0:1}" = '-' ]; then
+	set -- postgres "$@"
+fi
+
+# allow the container to be started with `--user`
+if [ "$1" = 'postgres' ] && [ "$(id -u)" = '0' ]; then
+	mkdir -p "$PGDATA"
+	chown -R postgres "$PGDATA"
+	chmod 700 "$PGDATA"
+
+	mkdir -p /var/run/postgresql
+	chown -R postgres /var/run/postgresql
+	chmod 775 /var/run/postgresql
+
+	# Create the transaction log directory before initdb is run (below) so the directory is owned by the correct user
+	if [ "$POSTGRES_INITDB_WALDIR" ]; then
+		mkdir -p "$POSTGRES_INITDB_WALDIR"
+		chown -R postgres "$POSTGRES_INITDB_WALDIR"
+		chmod 700 "$POSTGRES_INITDB_WALDIR"
+	fi
+
+	exec su-exec postgres "$BASH_SOURCE" "$@"
+fi
+
+if [ "$1" = 'postgres' ]; then
+	mkdir -p "$PGDATA"
+	chown -R "$(id -u)" "$PGDATA" 2>/dev/null || :
+	chmod 700 "$PGDATA" 2>/dev/null || :
+
+	# look specifically for PG_VERSION, as it is expected in the DB dir
+	if [ ! -s "$PGDATA/PG_VERSION" ]; then
+		# "initdb" is particular about the current user existing in "/etc/passwd", so we use "nss_wrapper" to fake that if necessary
+		# see https://github.com/docker-library/postgres/pull/253, https://github.com/docker-library/postgres/issues/359, https://cwrap.org/nss_wrapper.html
+		if ! getent passwd "$(id -u)" &> /dev/null && [ -e /usr/lib/libnss_wrapper.so ]; then
+			export LD_PRELOAD='/usr/lib/libnss_wrapper.so'
+			export NSS_WRAPPER_PASSWD="$(mktemp)"
+			export NSS_WRAPPER_GROUP="$(mktemp)"
+			echo "postgres:x:$(id -u):$(id -g):PostgreSQL:$PGDATA:/bin/false" > "$NSS_WRAPPER_PASSWD"
+			echo "postgres:x:$(id -g):" > "$NSS_WRAPPER_GROUP"
+		fi
+
+		file_env 'POSTGRES_INITDB_ARGS'
+		if [ "$POSTGRES_INITDB_WALDIR" ]; then
+			export POSTGRES_INITDB_ARGS="$POSTGRES_INITDB_ARGS --waldir $POSTGRES_INITDB_WALDIR"
+		fi
+		eval "initdb --username=postgres $POSTGRES_INITDB_ARGS"
+
+		# unset/cleanup "nss_wrapper" bits
+		if [ "${LD_PRELOAD:-}" = '/usr/lib/libnss_wrapper.so' ]; then
+			rm -f "$NSS_WRAPPER_PASSWD" "$NSS_WRAPPER_GROUP"
+			unset LD_PRELOAD NSS_WRAPPER_PASSWD NSS_WRAPPER_GROUP
+		fi
+
+		# check password first so we can output the warning before postgres
+		# messes it up
+		file_env 'POSTGRES_PASSWORD'
+		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 all $authMethod"
+		} >> "$PGDATA/pg_hba.conf"
+
+		# internal start of server in order to allow set-up using psql-client
+		# does not listen on external TCP/IP and waits until start finishes
+		PGUSER="${PGUSER:-postgres}" \
+		pg_ctl -D "$PGDATA" \
+			-o "-c listen_addresses=''" \
+			-w start
+
+		file_env 'POSTGRES_USER' 'postgres'
+		file_env 'POSTGRES_DB' "$POSTGRES_USER"
+
+		psql=( psql -v ON_ERROR_STOP=1 )
+
+		if [ "$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 $pass ;
+		EOSQL
+		echo
+
+		psql+=( --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" )
+
+		echo
+		for f in /docker-entrypoint-initdb.d/*; do
+			case "$f" in
+				*.sh)     echo "$0: running $f"; . "$f" ;;
+				*.sql)    echo "$0: running $f"; "${psql[@]}" -f "$f"; echo ;;
+				*.sql.gz) echo "$0: running $f"; gunzip -c "$f" | "${psql[@]}"; echo ;;
+				*)        echo "$0: ignoring $f" ;;
+			esac
+			echo
+		done
+
+		PGUSER="${PGUSER:-postgres}" \
+		pg_ctl -D "$PGDATA" -m fast -w stop
+
+		echo
+		echo 'PostgreSQL init process complete; ready for start up.'
+		echo
+	fi
+fi
+
+exec "$@"

11/docker-entrypoint.sh

@@ -0,0 +1,162 @@
+#!/usr/bin/env bash
+set -Eeo pipefail
+# TODO swap to -Eeuo pipefail above (after handling all potentially-unset variables)
+
+# usage: file_env VAR [DEFAULT]
+#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
+# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
+#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
+file_env() {
+	local var="$1"
+	local fileVar="${var}_FILE"
+	local def="${2:-}"
+	if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
+		exit 1
+	fi
+	local val="$def"
+	if [ "${!var:-}" ]; then
+		val="${!var}"
+	elif [ "${!fileVar:-}" ]; then
+		val="$(< "${!fileVar}")"
+	fi
+	export "$var"="$val"
+	unset "$fileVar"
+}
+
+if [ "${1:0:1}" = '-' ]; then
+	set -- postgres "$@"
+fi
+
+# allow the container to be started with `--user`
+if [ "$1" = 'postgres' ] && [ "$(id -u)" = '0' ]; then
+	mkdir -p "$PGDATA"
+	chown -R postgres "$PGDATA"
+	chmod 700 "$PGDATA"
+
+	mkdir -p /var/run/postgresql
+	chown -R postgres /var/run/postgresql
+	chmod 775 /var/run/postgresql
+
+	# Create the transaction log directory before initdb is run (below) so the directory is owned by the correct user
+	if [ "$POSTGRES_INITDB_WALDIR" ]; then
+		mkdir -p "$POSTGRES_INITDB_WALDIR"
+		chown -R postgres "$POSTGRES_INITDB_WALDIR"
+		chmod 700 "$POSTGRES_INITDB_WALDIR"
+	fi
+
+	exec gosu postgres "$BASH_SOURCE" "$@"
+fi
+
+if [ "$1" = 'postgres' ]; then
+	mkdir -p "$PGDATA"
+	chown -R "$(id -u)" "$PGDATA" 2>/dev/null || :
+	chmod 700 "$PGDATA" 2>/dev/null || :
+
+	# look specifically for PG_VERSION, as it is expected in the DB dir
+	if [ ! -s "$PGDATA/PG_VERSION" ]; then
+		# "initdb" is particular about the current user existing in "/etc/passwd", so we use "nss_wrapper" to fake that if necessary
+		# see https://github.com/docker-library/postgres/pull/253, https://github.com/docker-library/postgres/issues/359, https://cwrap.org/nss_wrapper.html
+		if ! getent passwd "$(id -u)" &> /dev/null && [ -e /usr/lib/libnss_wrapper.so ]; then
+			export LD_PRELOAD='/usr/lib/libnss_wrapper.so'
+			export NSS_WRAPPER_PASSWD="$(mktemp)"
+			export NSS_WRAPPER_GROUP="$(mktemp)"
+			echo "postgres:x:$(id -u):$(id -g):PostgreSQL:$PGDATA:/bin/false" > "$NSS_WRAPPER_PASSWD"
+			echo "postgres:x:$(id -g):" > "$NSS_WRAPPER_GROUP"
+		fi
+
+		file_env 'POSTGRES_INITDB_ARGS'
+		if [ "$POSTGRES_INITDB_WALDIR" ]; then
+			export POSTGRES_INITDB_ARGS="$POSTGRES_INITDB_ARGS --waldir $POSTGRES_INITDB_WALDIR"
+		fi
+		eval "initdb --username=postgres $POSTGRES_INITDB_ARGS"
+
+		# unset/cleanup "nss_wrapper" bits
+		if [ "${LD_PRELOAD:-}" = '/usr/lib/libnss_wrapper.so' ]; then
+			rm -f "$NSS_WRAPPER_PASSWD" "$NSS_WRAPPER_GROUP"
+			unset LD_PRELOAD NSS_WRAPPER_PASSWD NSS_WRAPPER_GROUP
+		fi
+
+		# check password first so we can output the warning before postgres
+		# messes it up
+		file_env 'POSTGRES_PASSWORD'
+		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 all $authMethod"
+		} >> "$PGDATA/pg_hba.conf"
+
+		# internal start of server in order to allow set-up using psql-client
+		# does not listen on external TCP/IP and waits until start finishes
+		PGUSER="${PGUSER:-postgres}" \
+		pg_ctl -D "$PGDATA" \
+			-o "-c listen_addresses=''" \
+			-w start
+
+		file_env 'POSTGRES_USER' 'postgres'
+		file_env 'POSTGRES_DB' "$POSTGRES_USER"
+
+		psql=( psql -v ON_ERROR_STOP=1 )
+
+		if [ "$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 $pass ;
+		EOSQL
+		echo
+
+		psql+=( --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" )
+
+		echo
+		for f in /docker-entrypoint-initdb.d/*; do
+			case "$f" in
+				*.sh)     echo "$0: running $f"; . "$f" ;;
+				*.sql)    echo "$0: running $f"; "${psql[@]}" -f "$f"; echo ;;
+				*.sql.gz) echo "$0: running $f"; gunzip -c "$f" | "${psql[@]}"; echo ;;
+				*)        echo "$0: ignoring $f" ;;
+			esac
+			echo
+		done
+
+		PGUSER="${PGUSER:-postgres}" \
+		pg_ctl -D "$PGDATA" -m fast -w stop
+
+		echo
+		echo 'PostgreSQL init process complete; ready for start up.'
+		echo
+	fi
+fi
+
+exec "$@"