Re: source of connection fails at pg startup?

Hi Stuart McGraw,

How about your "log_line_prefix
<https://www.postgresql.org/docs/10/static/runtime-config-logging.html#GUC-LOG-LINE-PREFIX>"
?

On Tue, May 22, 2018 at 7:48 AM, Stuart McGraw <smcg4191(at)mtneva(dot)com> wrote:

> When I start my postgresql server I get 11 messages reporting that
> "password
> authentication failed for user 'postgres'" spaced about ~.5sec apart.
> I increased the logging level to INFO, and added the application name to
> the
> message format (after the pid) which resulted in:
>
> 2018-05-21 23:04:44.395 MDT [20232][[unknown]] [unknown](at)[unknown] LOG:
> connection received: host=[local]
> 2018-05-21 23:04:44.395 MDT [20232][[unknown]] postgres(at)postgres
> FATAL: password authentication failed for user "postgres"
> 2018-05-21 23:04:44.395 MDT [20232][[unknown]] postgres(at)postgres
> DETAIL: Password does not match for user "postgres".
> Connection matched pg_hba.conf line 90: "local all all md5"
>
> This is on a Ububuntu-18.04 machine with postgresql-10.3 from Ubuntu. As
> distributed
> the pg_hba.conf line mentioned used "peer" authentication method, I have
> changed to
> "md5". When I change back to "peer" the error messages go away. The
> processes are
> too short-lived for me to catch with ps. Successful connect message
> example:
>
> 2018-05-21 23:25:13.577 MDT [21080][[unknown]] [unknown](at)[unknown] LOG:
> connection received: host=[local]
> 2018-05-21 23:25:13.578 MDT [21080][[unknown]] postgres(at)postgres LOG:
> connection authorized: user=postgres database=postgres
> 2018-05-21 23:25:13.579 MDT [21080][psql] postgres(at)postgres LOG:
> disconnection: session time: 0:00:00.002 user=postgres database=postgres
> host=[local]
>
> My question is, how can I find out where the connections are coming from
> so I can
> modify them to provide passwords (so I can go back to "md5")? Are there
> startup-
> time connections made by postgresql itself or is this likely from some
> Ubuntu-
> specific configuration?
>
> Thanks.
>
>