OpenERP 7 no funciona

He consultado esto en la sala de chat de Mageia en inglés y gracias a @intrbiz y @MrsB he logrado importantes avances. Creo que ya falta muy poco para que funcione. Seguramente sea una tontería lo que queda por hacer, pero a mí no se me ocurre.

Esto es lo que he hecho:

[root@localhost ~]# systemctl stop postgresql
[root@localhost ~]# cd /var/lib/pgsql
[root@localhost pgsql]#ls
backups/ data/
[root@localhost pgsql]# rm -rvf data/
[root@localhost pgsql]# ls
backups/
[root@localhost pgsql]# su - postgres
[postgres@localhost ~]$ initdb -E UTF8 -D /var/lib/pgsql/data
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.
The database cluster will be initialized with locale C.
The default text search configuration will be set to "english".
creating directory /var/lib/pgsql/data ... ok
creating subdirectories ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 24MB
creating configuration files ... ok
creating template1 database in /var/lib/pgsql/data/base/1 ... ok
initializing pg_authid ... ok
initializing dependencies ... ok
creating system views ... ok
loading system objects' descriptions ... ok
creating conversions ... ok
creating dictionaries ... ok
setting privileges on built-in objects ... ok
creating information schema ... ok
loading PL/pgSQL server-side language ... ok
vacuuming database template1 ... ok
copying template1 to template0 ... ok
copying template1 to postgres ... ok
WARNING: enabling "trust" authentication for local connections
You can change this by editing pg_hba.conf or using the -A option the
next time you run initdb.
Success. You can now start the database server using:
postgres -D /var/lib/pgsql/data
or
pg_ctl -D /var/lib/pgsql/data -l logfile start
[postgres@localhost ~]$ ls
backups/ data/
[postgres@localhost ~]$ exit
[root@localhost pgsql]# systemctl start postgresql
[root@localhost pgsql]# su - postgres
[postgres@localhost ~]$ createdb --encoding=UNICODE terp
ok
[postgres@localhost ~]$ createuser openerp
Shall the new role be a superuser? (y/n) n
Shall the new role be allowed to create databases? (y/n) y
Shall the new role be allowed to create more new roles? (y/n) y
[postgres@localhost ~]$ logout
[root@localhost pgsql]# systemctl start openerp-server.service

Como puede verse, al menos ahora he conseguido crear la base de datos y completar todos los pasos menos el último del README.urpmi que pegué en el mensaje anterior. Sin embargo, al tratar de acceder a http://localhost:8069/ desde Firefox (he probado como usuario normal y como root), me sigue saliendo el mismo error:

Internal Server Error
{"message": "OpenERP Server Error", "code": 200, "data": {"debug": "Server Traceback (most recent call last):\n File \"/usr/share/openerp/addons/web/session.py\", line 89, in send\n return openerp.netsvc.dispatch_rpc(service_name, method, args)\n File \"/usr/lib/python2.7/site-packages/openerp/netsvc.py\", line 292, in dispatch_rpc\n result = ExportService.getService(service_name).dispatch(method, params)\n File \"/usr/lib/python2.7/site-packages/openerp/service/web_services.py\", line 122, in dispatch\n return fn(*params)\n File \"/usr/lib/python2.7/site-packages/openerp/service/web_services.py\", line 359, in exp_list\n cr = db.cursor()\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 484, in cursor\n return Cursor(self._pool, self.dbname, serialized=serialized)\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 182, in __init__\n self._cnx = pool.borrow(dsn(dbname))\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 377, in _locked\n return fun(self, *args, **kwargs)\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 440, in borrow\n result = psycopg2.connect(dsn=dsn, connection_factory=PsycoConnection)\n File \"/usr/lib64/python2.7/site-packages/psycopg2/__init__.py\", line 164, in connect\n conn = _connect(dsn, connection_factory=connection_factory, async=async)\nOperationalError: could not connect to server: No such file or directory\n\tIs the server running locally and accepting\n\tconnections on Unix domain socket \"/var/run/postgresql/.s.PGSQL.5432\"?\n\n\nClient Traceback (most recent call last):\n File \"/usr/share/openerp/addons/web/http.py\", line 285, in dispatch\n r = method(self, **self.params)\n File \"/usr/share/openerp/addons/web/controllers/main.py\", line 573, in index\n db, redir = db_monodb_redirect(req)\n File \"/usr/share/openerp/addons/web/controllers/main.py\", line 98, in db_monodb_redirect\n return db_redirect(req, not config['list_db'])\n File \"/usr/share/openerp/addons/web/controllers/main.py\", line 109, in db_redirect\n dbs = db_list(req, True)\n File \"/usr/share/openerp/addons/web/controllers/main.py\", line 90, in db_list\n dbs = proxy.list(force)\n File \"/usr/share/openerp/addons/web/session.py\", line 30, in proxy_method\n result = self.session.send(self.service_name, method, *args)\n File \"/usr/share/openerp/addons/web/session.py\", line 103, in send\n raise xmlrpclib.Fault(openerp.tools.ustr(e), formatted_info)\nFault: <Fault could not connect to server: No such file or directory\n\tIs the server running locally and accepting\n\tconnections on Unix domain socket \"/var/run/postgresql/.s.PGSQL.5432\"?\n: 'Traceback (most recent call last):\\n File \"/usr/share/openerp/addons/web/session.py\", line 89, in send\\n return openerp.netsvc.dispatch_rpc(service_name, method, args)\\n File \"/usr/lib/python2.7/site-packages/openerp/netsvc.py\", line 292, in dispatch_rpc\\n result = ExportService.getService(service_name).dispatch(method, params)\\n File \"/usr/lib/python2.7/site-packages/openerp/service/web_services.py\", line 122, in dispatch\\n return fn(*params)\\n File \"/usr/lib/python2.7/site-packages/openerp/service/web_services.py\", line 359, in exp_list\\n cr = db.cursor()\\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 484, in cursor\\n return Cursor(self._pool, self.dbname, serialized=serialized)\\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 182, in __init__\\n self._cnx = pool.borrow(dsn(dbname))\\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 377, in _locked\\n return fun(self, *args, **kwargs)\\n File \"/usr/lib/python2.7/site-packages/openerp/sql_db.py\", line 440, in borrow\\n result = psycopg2.connect(dsn=dsn, connection_factory=PsycoConnection)\\n File \"/usr/lib64/python2.7/site-packages/psycopg2/__init__.py\", line 164, in connect\\n conn = _connect(dsn, connection_factory=connection_factory, async=async)\\nOperationalError: could not connect to server: No such file or directory\\n\\tIs the server running locally and accepting\\n\\tconnections on Unix domain socket \"/var/run/postgresql/.s.PGSQL.5432\"?\\n\\n'>\n", "fault_code": "could not connect to server: No such file or directory\n\tIs the server running locally and accepting\n\tconnections on Unix domain socket \"/var/run/postgresql/.s.PGSQL.5432\"?\n", "type": "server_exception"}}

¿Alguna sugerencia?