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Dockerfile
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## This Dockerfile is meant to aid in the building and debugging patroni whilst developing on your local machine
## It has all the necessary components to play/debug with a single node appliance, running etcd
ARG PG_MAJOR=10
ARG COMPRESS=false
ARG PGHOME=/home/postgres
ARG PGDATA=$PGHOME/data
ARG LC_ALL=C.UTF-8
ARG LANG=C.UTF-8
FROM postgres:$PG_MAJOR as builder
ARG PGHOME
ARG PGDATA
ARG LC_ALL
ARG LANG
ENV ETCDVERSION=2.3.8 CONFDVERSION=0.16.0
RUN set -ex \
&& export DEBIAN_FRONTEND=noninteractive \
&& echo 'APT::Install-Recommends "0";\nAPT::Install-Suggests "0";' > /etc/apt/apt.conf.d/01norecommend \
&& apt-get update -y \
# postgres:10 is based on debian, which has the patroni package. We will install all required dependencies
&& apt-cache depends patroni | sed -n -e 's/.*Depends: \(python3-.\+\)$/\1/p' \
| grep -Ev '^python3-(sphinx|etcd|consul|kazoo|kubernetes)' \
| xargs apt-get install -y vim curl less jq locales haproxy sudo \
python3-etcd python3-kazoo python3-pip busybox \
&& pip3 install dumb-init \
\
# Cleanup all locales but en_US.UTF-8
&& find /usr/share/i18n/charmaps/ -type f ! -name UTF-8.gz -delete \
&& find /usr/share/i18n/locales/ -type f ! -name en_US ! -name en_GB ! -name i18n ! -name iso14651_t1 ! -name iso14651_t1_common ! -name 'translit_*' -delete \
&& echo 'en_US.UTF-8 UTF-8' > /usr/share/i18n/SUPPORTED \
\
# Make sure we have a en_US.UTF-8 locale available
&& localedef -i en_US -c -f UTF-8 -A /usr/share/locale/locale.alias en_US.UTF-8 \
\
# haproxy dummy config
&& echo 'global\n stats socket /run/haproxy/admin.sock mode 660 level admin' > /etc/haproxy/haproxy.cfg \
\
# vim config
&& echo 'syntax on\nfiletype plugin indent on\nset mouse-=a\nautocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab' > /etc/vim/vimrc.local \
\
# Prepare postgres/patroni/haproxy environment
&& mkdir -p $PGHOME/.config/patroni /patroni /run/haproxy \
&& ln -s ../../postgres0.yml $PGHOME/.config/patroni/patronictl.yaml \
&& ln -s /patronictl.py /usr/local/bin/patronictl \
&& sed -i "s|/var/lib/postgresql.*|$PGHOME:/bin/bash|" /etc/passwd \
&& chown -R postgres:postgres /var/log \
\
# Download etcd
&& curl -sL https://github.com/coreos/etcd/releases/download/v${ETCDVERSION}/etcd-v${ETCDVERSION}-linux-amd64.tar.gz \
| tar xz -C /usr/local/bin --strip=1 --wildcards --no-anchored etcd etcdctl \
\
# Download confd
&& curl -sL https://github.com/kelseyhightower/confd/releases/download/v${CONFDVERSION}/confd-${CONFDVERSION}-linux-amd64 \
> /usr/local/bin/confd && chmod +x /usr/local/bin/confd \
\
# Clean up all useless packages and some files
&& apt-get purge -y --allow-remove-essential python3-pip gzip bzip2 util-linux e2fsprogs \
libmagic1 bsdmainutils login ncurses-bin libmagic-mgc e2fslibs bsdutils \
exim4-config gnupg-agent dirmngr libpython2.7-stdlib libpython2.7-minimal \
&& apt-get autoremove -y \
&& apt-get clean -y \
&& rm -rf /var/lib/apt/lists/* \
/root/.cache \
/var/cache/debconf/* \
/etc/rc?.d \
/etc/systemd \
/docker-entrypoint* \
/sbin/pam* \
/sbin/swap* \
/sbin/unix* \
/usr/local/bin/gosu \
/usr/sbin/[acgipr]* \
/usr/sbin/*user* \
/usr/share/doc* \
/usr/share/man \
/usr/share/info \
/usr/share/i18n/locales/translit_hangul \
/usr/share/locale/?? \
/usr/share/locale/??_?? \
/usr/share/postgresql/*/man \
/usr/share/postgresql-common/pg_wrapper \
/usr/share/vim/vim80/doc \
/usr/share/vim/vim80/lang \
/usr/share/vim/vim80/tutor \
# /var/lib/dpkg/info/* \
&& find /usr/bin -xtype l -delete \
&& find /var/log -type f -exec truncate --size 0 {} \; \
&& find /usr/lib/python3/dist-packages -name '*test*' | xargs rm -fr \
&& find /lib/x86_64-linux-gnu/security -type f ! -name pam_env.so ! -name pam_permit.so ! -name pam_unix.so -delete
# perform compression if it is necessary
ARG COMPRESS
RUN if [ "$COMPRESS" = "true" ]; then \
set -ex \
# Allow certain sudo commands from postgres
&& echo 'postgres ALL=(ALL) NOPASSWD: /bin/tar xpJf /a.tar.xz -C /, /bin/rm /a.tar.xz, /bin/ln -snf dash /bin/sh' >> /etc/sudoers \
&& ln -snf busybox /bin/sh \
&& files="/bin/sh /usr/bin/sudo /usr/lib/sudo/sudoers.so /lib/x86_64-linux-gnu/security/pam_*.so" \
&& libs="$(ldd $files | awk '{print $3;}' | grep '^/' | sort -u) /lib/x86_64-linux-gnu/ld-linux-x86-64.so.* /lib/x86_64-linux-gnu/libnsl.so.* /lib/x86_64-linux-gnu/libnss_compat.so.*" \
&& (echo /var/run $files $libs | tr ' ' '\n' && realpath $files $libs) | sort -u | sed 's/^\///' > /exclude \
&& find /etc/alternatives -xtype l -delete \
&& save_dirs="usr lib var bin sbin etc/ssl etc/init.d etc/alternatives etc/apt" \
&& XZ_OPT=-e9v tar -X /exclude -cpJf a.tar.xz $save_dirs \
# we call "cat /exclude" to avoid including files from the $save_dirs that are also among
# the exceptions listed in the /exclude, as "uniq -u" eliminates all non-unique lines.
# By calling "cat /exclude" a second time we guarantee that there will be at least two lines
# for each exception and therefore they will be excluded from the output passed to 'rm'.
&& /bin/busybox sh -c "(find $save_dirs -not -type d && cat /exclude /exclude && echo exclude) | sort | uniq -u | xargs /bin/busybox rm" \
&& /bin/busybox --install -s \
&& /bin/busybox sh -c "find $save_dirs -type d -depth -exec rmdir -p {} \; 2> /dev/null"; \
fi
FROM scratch
COPY --from=builder / /
LABEL maintainer="Alexander Kukushkin <alexander.kukushkin@zalando.de>"
ARG PG_MAJOR
ARG COMPRESS
ARG PGHOME
ARG PGDATA
ARG LC_ALL
ARG LANG
ARG PGBIN=/usr/lib/postgresql/$PG_MAJOR/bin
ENV LC_ALL=$LC_ALL LANG=$LANG EDITOR=/usr/bin/editor
ENV PGDATA=$PGDATA PATH=$PATH:$PGBIN
COPY patroni /patroni/
COPY extras/confd/conf.d/haproxy.toml /etc/confd/conf.d/
COPY extras/confd/templates/haproxy.tmpl /etc/confd/templates/
COPY patroni*.py docker/entrypoint.sh /
COPY postgres?.yml $PGHOME/
WORKDIR $PGHOME
RUN sed -i 's/env python/&3/' /patroni*.py \
# "fix" patroni configs
&& sed -i 's/^\( connect_address:\| - host\)/#&/' postgres?.yml \
&& sed -i 's/^ listen: 127.0.0.1/ listen: 0.0.0.0/' postgres?.yml \
&& sed -i "s|^\( data_dir: \).*|\1$PGDATA|" postgres?.yml \
&& sed -i "s|^#\( bin_dir: \).*|\1$PGBIN|" postgres?.yml \
&& sed -i 's/^ - encoding: UTF8/ - locale: en_US.UTF-8\n&/' postgres?.yml \
&& sed -i 's/^\(scope\|name\|etcd\| host\| authentication\| pg_hba\| parameters\):/#&/' postgres?.yml \
&& sed -i 's/^ \(replication\|superuser\|rewind\|unix_socket_directories\|\(\( \)\{0,1\}\(username\|password\)\)\):/#&/' postgres?.yml \
&& sed -i 's/^ parameters:/ pg_hba:\n - local all all trust\n - host replication all all md5\n - host all all all md5\n&\n max_connections: 100/' postgres?.yml \
&& if [ "$COMPRESS" = "true" ]; then chmod u+s /usr/bin/sudo; fi \
&& chown -R postgres:postgres $PGHOME /run /etc/haproxy
USER postgres
ENTRYPOINT ["/bin/sh", "/entrypoint.sh"]