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matrix-docker-ansible-deploy/roles/matrix-postgres/templates/init-additional-db-user-and-role.sql.j2
Slavi Pantaleev da4cb2f639 Do not use the postgresql_user/postgresql_db modules
While these modules are really nice and helpful, we can't use them
for at least 2 reasons:

- for us, Postgres runs in a container on a private Docker network
(`--network=matrix`) without usually being exposed to the host.
These modules execute on the host so they won't be able to reach it.

- these modules require `psycopg2`, so we need to install it before
using it. This might or might not be its own can of worms.
2020-12-14 00:31:38 +02:00

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937 B
Django/Jinja

-- `CREATE USER` does not support `IF NOT EXISTS`, so we use this workaround to prevent an error and raise a notice instead.
-- Seen here: https://stackoverflow.com/a/49858797
DO $$
BEGIN
CREATE USER {{ additional_db.username }};
EXCEPTION WHEN DUPLICATE_OBJECT THEN
RAISE NOTICE 'not creating role {{ additional_db.username }}, since it already exists';
END
$$;
-- This is useful for initial user creation (since we don't assign a password above) and for handling subsequent password changes
-- TODO - we should escape quotes in the password.
ALTER ROLE {{ additional_db.username }} PASSWORD '{{ additional_db.pass }}';
-- This will generate an error on subsequent execution
CREATE DATABASE {{ additional_db.name }} WITH LC_CTYPE 'C' LC_COLLATE 'C' OWNER {{ additional_db.username }};
-- This is useful for changing the database owner subsequently
ALTER DATABASE {{ additional_db.name }} OWNER TO {{ additional_db.username }};