Extending Postgres Docker

add-config.sh

#!/bin/bash

echo "include '/postgresql-extend.conf'" >> $PGDATA/postgresql.conf

Dockerfile

FROM postgres:9.4

MAINTAINER Victor Franco "victorjtfranco@users.noreply.github.com"

COPY add-config.sh /docker-entrypoint-initdb.d/
COPY postgresql-extend.conf /

postgresql-extend.conf

wal_level = 'logical'
max_worker_processes = 10   # one per database needed on provider node
                            # one per node needed on subscriber node
max_replication_slots = 10  # one per node needed on provider node
max_wal_senders = 10        # one per node needed on provider node

Referenced at docker-library/postgres#105 (comment)

It is enough to add RUN echo -e "\n\ninclude '/postgresql-extend.conf'" >> /usr/share/postgresql/postgresql.conf.sample to Dockerfile thanks to docker-library/postgres#127