RE: cant connect to localhost:5432 (but unix socket ok)

["Jain, Ankit" <Ankit.Jain@xxxxxxxxxx>]

Did you try modifying the firewall settings ?

 

Add postgres service to the firewall. If that doesn’t work, explicitly open the port 5433 in the firewall.

 

From: Joao Miguel Ferreira <joao.miguel.c.ferreira@xxxxxxxxx>
Sent: Thursday, February 4, 2021 10:08 AM
To: Tom Lane <tgl@xxxxxxxxxxxxx>
Cc: depesz@xxxxxxxxxx; pgsql-general <pgsql-general@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: cant connect to localhost:5432 (but unix socket ok)

 

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On Thu, Feb 4, 2021 at 3:04 PM Joao Miguel Ferreira <joao.miguel.c.ferreira@xxxxxxxxx> wrote:

 

 

On Thu, Feb 4, 2021 at 3:02 PM Joao Miguel Ferreira <joao.miguel.c.ferreira@xxxxxxxxx> wrote:

Hi Tom

 

On Thu, Feb 4, 2021 at 2:50 PM Tom Lane <tgl@xxxxxxxxxxxxx> wrote:

Joao Miguel Ferreira <joao.miguel.c.ferreira@xxxxxxxxx> writes:
> On Thu, Feb 4, 2021 at 2:26 PM hubert depesz lubaczewski <depesz@xxxxxxxxxx>
> wrote:
>>> My database is not listening on TCP/localhost, desptite it is listening
>>>> on the unix socket. How can I investigate this?

> it's on 5433:

Hmm, something odd there, because a port number mismatch should have
resulted in psql failing to connect via unix socket either.  Maybe
you have more than one active postmaster?

 

"ps xauwww | grep postgres" shows only one postgres process (and a few vaccum related)

 

here is the full list:

 

root@deb10tp:~# ps xauww | grep postgres
postgres   825  0.0  0.1 213472 14980 ?        S    09:59   0:01 /usr/lib/postgresql/11/bin/postgres -D /var/lib/postgresql/11/main -c config_file=/etc/postgresql/11/main/postgresql.conf
postgres   847  0.0  0.0 213572  5660 ?        Ss   09:59   0:00 postgres: 11/main: checkpointer  
postgres   848  0.0  0.0 213472  3808 ?        Ss   09:59   0:00 postgres: 11/main: background writer  
postgres   849  0.0  0.0 213472  3688 ?        Ss   09:59   0:00 postgres: 11/main: walwriter  
postgres   850  0.0  0.0 214012  5628 ?        Ss   09:59   0:01 postgres: 11/main: autovacuum launcher  
postgres   852  0.0  0.4 102172 34612 ?        Ss   09:59   0:10 postgres: 11/main: stats collector  
postgres   853  0.0  0.0 213880  4260 ?        Ss   09:59   0:00 postgres: 11/main: logical replication launcher  
root      9652  0.0  0.0   6208   884 pts/1    S+   15:06   0:00 grep postgres
root@deb10tp:~#

 

 

 

 

 

yes, I see your point. makes sense. the unix socket is actually also on 5433

root@deb10tp:~# grep -nr 543 /etc/postgresql
/etc/postgresql/11/main/postgresql.conf:63:port = 5433
root@deb10tp:~# find /var/run/postgresql/ | grep 543
/var/run/postgresql/.s.PGSQL.5433
/var/run/postgresql/.s.PGSQL.5433.lock
root@deb10tp:~#

 

Anyway, given these settings, "psql -p 5433 -h localhost" should
connect.  If you still get "connection refused" then you need to
look at the kernel firewall (packet filter) settings.

 

yes, with "-p 5433" I can connect

 

                        regards, tom lane

 

thanks