Merge pull request #7967 from readthedocs/humitos/docker-psql-client

Upgrade `postgres-client` to v12 in Docker image

Author: humitos

dockerfiles/Dockerfile

@@ -20,14 +20,23 @@ RUN apt-get -y install \
         build-essential \
         python3-pip \
         python3-dev \
-        postgresql-client \
         libmysqlclient-dev \
         libfreetype6 \
         libjpeg-dev \
         sqlite \
         netcat \
         telnet
 
+# https://www.postgresql.org/download/linux/ubuntu/
+# Use PostgreSQL client 12 from official PostgreSQL Ubuntu's repository to avoid this WARNING
+# WARNING: psql major version 10, server major version 12.
+# Some psql features might not work.
+# TODO: remove this when upgrading to Ubuntu 20.04 LTS
+RUN sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+RUN curl -s https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
+RUN apt-get -y update
+RUN apt-get -y install postgresql-client-12
+
 # Uncomment en_US.UTF-8 locale and generate it
 RUN sed -i -e 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
     locale-gen