How to connect to embedded POSTGRESQL on Mac OSX Lion Server

Question

Hi all,
I've upgraded my Mac OSX 10.6 server to 10.7 server 2 days ago.
My web sites databases are still under MySQL server cause it's still running after the upgrade.
I manage to migrate the databases to PostgreSQL, so i've enabled the wiki from the server.app to launch the PostgreSQL server.
I can see that it's now running through a ps -ef | grep sql and that it's listening on the unix domain socket 5432 with netstat -an | grep SQL in a terminal shell.
The problem is that I'am unable to connect to it.
I tried psql -U postgres, and installed the Navcat for postgreSQL Lite, but they failed to connec to the database server twith the same error :
psql: could not connect to server : Permission Denied
Is the server running locally and accepting connections on Unix domain socket "/var/pgsql_socket/.s.PGSQL.5432"?
It seems that there is a permission problem on the Unix Domain Socket /var/pgsql_socket/.s.PGSQL.5432.
It has a 0770 permission on it, but i don't know if it's relly the problem.
I've compared with MySQL server, which I am able to manage through Navcat for MySQL Lite without any problem, and the socket permission are 0777 on /var/mysql/mysql.sock.
Does somebody able to connect to the embedded PostgreSQL server ?
Or am I doing something wrong ?
Thanks.

Answer 1

Thanks for your replies.
I was able to connect but not from navcat
sudo -u _postgres psql template1 (or your database name)
I am able to connect using this command too
1. Need to add yourself or the account accessing the database to Postgres Users group (use admin tools)
So I agree that I have to add my user to the _postgres user group, but how do you did ?
Using the admin tools, I did not find this Postgres Users group ?
I don't understand why server's administrators are not members of this group already ...
2. Create a role on database login in as _posgres
Ok, I will do.
3. To login in navcat you need to check socket to /var/pgsql_socket
OK, I've already set the socket in Navcat to /var/pgsql_socket
4. I was unable to enable TCP connection yet
I am unable to enable it too. I tried to modify the config files in /var/pgsql, without success.
I have no firewall on my server too, it's protected by my router's firewall and NAT.
Thanks again for your help.