161 lines
4.3 KiB
ReStructuredText
161 lines
4.3 KiB
ReStructuredText
:title: PostgreSQL service How-To
|
|
:description: Running and installing a PostgreSQL service
|
|
:keywords: docker, example, package installation, postgresql
|
|
|
|
.. _postgresql_service:
|
|
|
|
PostgreSQL Service
|
|
==================
|
|
|
|
.. include:: example_header.inc
|
|
|
|
.. note::
|
|
|
|
A shorter version of `this blog post`_.
|
|
|
|
.. _this blog post: http://zaiste.net/2013/08/docker_postgresql_how_to/
|
|
|
|
Installing PostgreSQL on Docker
|
|
-------------------------------
|
|
|
|
Run an interactive shell in a Docker container.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo docker run -i -t ubuntu /bin/bash
|
|
|
|
Update its dependencies.
|
|
|
|
.. code-block:: bash
|
|
|
|
apt-get update
|
|
|
|
Install ``python-software-properties``, ``software-properties-common``, ``wget`` and ``vim``.
|
|
|
|
.. code-block:: bash
|
|
|
|
apt-get -y install python-software-properties software-properties-common wget vim
|
|
|
|
Add PostgreSQL's repository. It contains the most recent stable release
|
|
of PostgreSQL, ``9.3``.
|
|
|
|
.. code-block:: bash
|
|
|
|
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add -
|
|
echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list
|
|
apt-get update
|
|
|
|
Finally, install PostgreSQL 9.3
|
|
|
|
.. code-block:: bash
|
|
|
|
apt-get -y install postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3
|
|
|
|
Now, create a PostgreSQL superuser role that can create databases and
|
|
other roles. Following Vagrant's convention the role will be named
|
|
``docker`` with ``docker`` password assigned to it.
|
|
|
|
.. code-block:: bash
|
|
|
|
su postgres -c "createuser -P -d -r -s docker"
|
|
|
|
Create a test database also named ``docker`` owned by previously created ``docker``
|
|
role.
|
|
|
|
.. code-block:: bash
|
|
|
|
su postgres -c "createdb -O docker docker"
|
|
|
|
Adjust PostgreSQL configuration so that remote connections to the
|
|
database are possible. Make sure that inside
|
|
``/etc/postgresql/9.3/main/pg_hba.conf`` you have following line:
|
|
|
|
.. code-block:: bash
|
|
|
|
host all all 0.0.0.0/0 md5
|
|
|
|
Additionaly, inside ``/etc/postgresql/9.3/main/postgresql.conf``
|
|
uncomment ``listen_addresses`` like so:
|
|
|
|
.. code-block:: bash
|
|
|
|
listen_addresses='*'
|
|
|
|
.. note::
|
|
|
|
This PostgreSQL setup is for development only purposes. Refer
|
|
to PostgreSQL documentation how to fine-tune these settings so that it
|
|
is secure enough.
|
|
|
|
Exit.
|
|
|
|
.. code-block:: bash
|
|
|
|
exit
|
|
|
|
Create an image from our container and assign it a name. The ``<container_id>``
|
|
is in the Bash prompt; you can also locate it using ``docker ps -a``.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo docker commit <container_id> <your username>/postgresql
|
|
|
|
Finally, run the PostgreSQL server via ``docker``.
|
|
|
|
.. code-block:: bash
|
|
|
|
CONTAINER=$(sudo docker run -d -p 5432 \
|
|
-t <your username>/postgresql \
|
|
/bin/su postgres -c '/usr/lib/postgresql/9.3/bin/postgres \
|
|
-D /var/lib/postgresql/9.3/main \
|
|
-c config_file=/etc/postgresql/9.3/main/postgresql.conf')
|
|
|
|
Connect the PostgreSQL server using ``psql`` (You will need the
|
|
postgresql client installed on the machine. For ubuntu, use something
|
|
like ``sudo apt-get install postgresql-client``).
|
|
|
|
.. code-block:: bash
|
|
|
|
CONTAINER_IP=$(sudo docker inspect -format='{{.NetworkSettings.IPAddress}}' $CONTAINER)
|
|
psql -h $CONTAINER_IP -p 5432 -d docker -U docker -W
|
|
|
|
As before, create roles or databases if needed.
|
|
|
|
.. code-block:: bash
|
|
|
|
psql (9.3.1)
|
|
Type "help" for help.
|
|
|
|
docker=# CREATE DATABASE foo OWNER=docker;
|
|
CREATE DATABASE
|
|
|
|
Additionally, publish your newly created image on the Docker Index.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo docker login
|
|
Username: <your username>
|
|
[...]
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo docker push <your username>/postgresql
|
|
|
|
PostgreSQL service auto-launch
|
|
------------------------------
|
|
|
|
Running our image seems complicated. We have to specify the whole command with
|
|
``docker run``. Let's simplify it so the service starts automatically when the
|
|
container starts.
|
|
|
|
.. code-block:: bash
|
|
|
|
sudo docker commit -run='{"Cmd": \
|
|
["/bin/su", "postgres", "-c", "/usr/lib/postgresql/9.3/bin/postgres -D \
|
|
/var/lib/postgresql/9.3/main -c \
|
|
config_file=/etc/postgresql/9.3/main/postgresql.conf"], "PortSpecs": ["5432"]}' \
|
|
<container_id> <your username>/postgresql
|
|
|
|
From now on, just type ``docker run <your username>/postgresql`` and
|
|
PostgreSQL should automatically start.
|