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doc: add instructions for SSL DB connections

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Walk through an advanced workflow of enabling SSL connections for
postgresql.
This commit is contained in:
Ken Dreyer 2021-07-20 23:05:12 -04:00
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docs/source/database_howto.rst
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@ -130,3 +130,57 @@ existing tables.
SELECT partition_buildroot_listing();
DROP FUNCTION partition_buildroot_listing();
COMMIT;
Using SSL with PostgreSQL
-------------------------
The basic :doc:`Koji server walkthrough <server_howto>` and sample
configuration files instruct users to use plaintext TCP/IP connections to the
postgresql server. This is not a good practice, and it is more secure to use
SSL. You'll need to configure the postgresql server to accept SSL connections,
and then configure the Koji Hub to only use a trusted SSL connection.
Enabling SSL on the PostgreSQL server
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Edit ``/var/lib/pgsql/data/postgresql.conf``:
* Enable SSL with ``ssl = on``
* The ``listen_addresses`` option cannot be empty. ``listen_addresses = '*'``
will make postgres listen on every network interface (simpler), or you can
restrict it to only certain network interfaces.
Create two files:
* ``/var/lib/pgsql/data/server.crt`` - This is the public signed certificate.
It should include the full chain (including the CA and any intermediates).
* ``/var/lib/pgsql/data/server.key`` - The private key.
Set the ownership appropriately::
chown postgres:postgres /var/lib/pgsql/data/server.{crt,key}
chmod 0600 /var/lib/pgsql/data/server.key
Restart postgresql for the new settings to take effect::
systemctl restart postgresql
Configuring the Koji hub to use SSL to Postgres
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Once you've enabled SSL on the PostgreSQL server, you can test it with the
CLI::
psql 'postgresql://koji:example_password@db.example.com/koji?sslmode=verify-full&sslrootcert=/etc/pki/tls/certs/ca-bundle.trust.crt'
You should be able to list tables, run queries, etc.
Edit ``/etc/koji-hub/hub.conf`` to use this connection string::
DBConnectionString = postgresql://koji:example_password@kojidev.example.com/koji?sslmode=verify-full&sslrootcert=/etc/pki/tls/certs/ca-bundle.trust.crt
Restart the hub and verify the new ``DBConnectionString`` is working::
systemctl restart httpd
koji hello