I found a work around for the problem:
After changing access permissions and ownership of the symlink data directory, I logged into postgres using 'postgres'
loginas:
>>> sudo -i -u postgres
Then force started postgres from there as mentioned below. The execution doesn't return back to prompt, so had it run
backin the background. Postgres started running back to normal.
>>> /usr/bin/postgres -D /var/lib/pgsql/data &
Thanks !
-Shibayan
-----Original Message-----
From: Laurenz Albe <laurenz.albe@cybertec.at>
Sent: Sunday, July 14, 2019 9:05 AM
To: Adrian Klaver <adrian.klaver@aklaver.com>; Chatterjee, Shibayan <shibayan.chatterjee@level3.com>;
pgsql-general@postgresql.org
Subject: Re: Issue: Creating Symlink for data directory of postgresql in CentOS7
Adrian Klaver wrote:
> On 7/13/19 4:30 AM, Laurenz Albe wrote:
> > On Fri, 2019-07-12 at 18:08 +0000, Chatterjee, Shibayan wrote:
> > > > Jul 12 10:00:51 postgresql-check-db-dir: "/data/postgresql/data" is missing or empty.
> > > > Jul 12 10:00:51 postgresql-check-db-dir: Use "postgresql-setup initdb" to initialize the database cluster.
> > > > Jul 12 10:00:51 postgresql-check-db-dir: See /usr/share/doc/postgresql-9.2.24/README.rpm-dist for more
information.
> > >
> > > For sure there's all the necessary files in '/data/postgresql/data'.
> > > The startup process cannot read it, because of sym link.
> >
> > Well, where is the source for this fabled "postgresql-check-db-dir"?
>
> https://git.postgresql.org/gitweb/?p=pgrpms.git;a=blob;f=rpm/redhat/9.
> 2/postgresql/EL-7/postgresql92-check-db-dir;h=550b31770cabacf32cbb1b8f
> 272e8ce305fc9908;hb=HEAD
Thanks. I read this:
30 # Check for the PGDATA structure
31 if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base" ]
32 then
[...]
49 else
50 # No existing PGDATA! Warn the user to initdb it.
51 echo $"\"$PGDATA\" is missing or empty."
52 echo $"Use \"/usr/pgsql-9.2/bin/postgresql92-setup initdb\" to initialize the database cluster."
53 echo $"See $PGDOCDIR/README.rpm-dist for more information."
54 exit 1
55 fi
That means that either there was no regular file /data/postgresql/data/PG_VERSION or no directory
/data/postgresql/data/base,or that the user running the script lacked the permissions to access them.
Since you say that there was a regular data directory there, that would point to permission problems.
Witn that information, it should be simple to debug the problem.
Yours,
Laurenz Albe
--
Cybertec | https://www.cybertec-postgresql.com
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