for Postgres, switch to ubuntu 18.04 and postgres 9.4

atdb/docker/postgres/Dockerfile

@@ -2,25 +2,25 @@
 # example Dockerfile for https://docs.docker.com/engine/examples/postgresql_service/
 #
 
-FROM ubuntu:16.04
+FROM ubuntu:18.04
 
 # Add the PostgreSQL PGP key to verify their Debian packages.
 # It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc
 RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8
 
 # Add PostgreSQL's repository. It contains the most recent stable release
-#     of PostgreSQL, ``9.3``.
+#     of PostgreSQL, ``9.4``.
 RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list
 
-# Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.3
+# Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.4
 #  There are some warnings (in red) that show up during the build. You can hide
 #  them by prefixing each apt-get statement with DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3
+RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.4 postgresql-client-9.4 postgresql-contrib-9.4
 
 # Note: The official Debian and Ubuntu images automatically ``apt-get clean``
 # after each ``apt-get``
 
-# Run the rest of the commands as the ``postgres`` user created by the ``postgres-9.3`` package when it was ``apt-get installed``
+# Run the rest of the commands as the ``postgres`` user created by the ``postgres-9.4`` package when it was ``apt-get installed``
 USER postgres
 
 # Create a PostgreSQL role named ``dbadmin`` with ``dbadmin123`` as the password and
@@ -33,17 +33,17 @@ RUN    /etc/init.d/postgresql start &&\
 
 # Adjust PostgreSQL configuration so that remote connections to the
 # database are possible.
-RUN echo "local all dbadmin md5" >> /etc/postgresql/9.3/main/pg_hba.conf
-RUN echo "host all  all    0.0.0.0/0  md5" >> /etc/postgresql/9.3/main/pg_hba.conf
+RUN echo "local all dbadmin md5" >> /etc/postgresql/9.4/main/pg_hba.conf
+RUN echo "host all  all    0.0.0.0/0  md5" >> /etc/postgresql/9.4/main/pg_hba.conf
 
-# And add ``listen_addresses`` to ``/etc/postgresql/9.3/main/postgresql.conf``
-RUN echo "listen_addresses='*'" >> /etc/postgresql/9.3/main/postgresql.conf
+# And add ``listen_addresses`` to ``/etc/postgresql/9.4/main/postgresql.conf``
+RUN echo "listen_addresses='*'" >> /etc/postgresql/9.4/main/postgresql.conf
 
 # Add VOLUMEs to allow backup of config, logs and databases
 VOLUME  ["/etc/postgresql", "/var/log/postgresql", "/var/lib/postgresql"]
 
 # Set the default command to run when starting the container
-CMD ["/usr/lib/postgresql/9.3/bin/postgres", "-D", "/var/lib/postgresql/9.3/main", "-c", "config_file=/etc/postgresql/9.3/main/postgresql.conf"]
+CMD ["/usr/lib/postgresql/9.4/bin/postgres", "-D", "/var/lib/postgresql/9.4/main", "-c", "config_file=/etc/postgresql/9.4/main/postgresql.conf"]
 
 # build the image like this:
 # docker build -t atdb-ldv-postgres .