Re: issue with reading hostname

I mean, Once I change the hostname then how will the socket read the new
hostname ? Does it require a postgres service restart ?

On Tue, Apr 23, 2024 at 3:19 AM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

> On 4/22/24 14:37, Atul Kumar wrote:
> > Can we edit the socket to change the hostname in it ?
>
> On Ubuntu 22.04 install, given:
>
> srwxrwxrwx 1 postgres postgres 0 Apr 22 14:01 .s.PGSQL.5432=
> -rw------- 1 postgres postgres 68 Apr 22 14:01 .s.PGSQL.5432.lock
>
> The contents of .s.PGSQL.5432.lock(the file that indicates a Postgres
> instance has a lock on the socket) are:
>
> 862
> /var/lib/postgresql/15/main
> 1713795311
> 5432
> /var/run/postgresql
>
> There is no hostname to be changed as you are working with a local socket.
>
> >
> > Regards.
> >
> > On Tue, Apr 23, 2024 at 2:41 AM Ron Johnson <ronljohnsonjr(at)gmail(dot)com
> > <mailto:ronljohnsonjr(at)gmail(dot)com>> wrote:
> >
> > On Mon, Apr 22, 2024 at 4:14 PM Atul Kumar <akumar14871(at)gmail(dot)com
> > <mailto:akumar14871(at)gmail(dot)com>> wrote:
> >
> > Hi,
> >
> > I have postgresql version 15 running on centos7.
> >
> > I have below query that reads hostname from /tmp directory:
> >
> > psql postgres -A -t -p 5432 -h /tmp/ -c 'SELECT
> > pg_is_in_recovery();'
> >
> >
> > If you installed from the PGDG repository (possibly also the CENTOS
> > repos, but I'm not sure), then the domain socket also lives in :
> > /var/run/postgresql
> >
> > * I find that more expressive than /tmp.
> > * No need to specify the host when using sockets.
> > * Using a socket name makes parameterizing the hostname easier in
> > scripts.
> >
> >
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>
>