Re: System (and DB) upgrade problem., "part 2"

On Mon, Jan 18, 2021 at 09:53:33PM +0100, W.P. wrote:
> W dniu 18.01.2021 o 17:19, Laurenz Albe pisze:
> > On Mon, 2021-01-18 at 05:33 +0100, W.P. wrote:
> > > For 9.5 to 9.6 transition, it worked like charm. (except some problems
> > > with parsing json data in a view, but this I will address later, after
> > > upgrade to final version - Fedora 30, probably PG 10.x).
> > >
> > > Now I have problem with 9.6 -> 10.7 (Fedora 27 -> 28) upgrade.
> > > As expected after system upgrade, database fails to start "files
> > > incompatible with binaries".
> > >
> > > Found pg_upgrade, command line options "-b
> > > /usr/lib/pgsql/postgresql-9.6/bin -B /usr/bin -d /var/lib/pgsql/data/"
> > > BUT what should I put for option -D? ("new cluster data") Was
> > > (directory) already created for me (during system upgrade), or have I to
> > > create it somewhere (where? is best practice).
> > >
> > > There are NO logs for today trial to start in
> > > /var/lib/pgsql/data/pg_log/. Where they could be?
> > You would call "initdb" or "postgresql-10-setup" to create a new, empty
> > cluster in version 10 and use that with -D.
> Ok, so "step-by-step":
> 1), I copy / move "somewhere" OLD DB files (*/pgsql/data/* for -d option),
> 2). Do initdb / postgresql-10-setup to create NEW empty base (in
> /var/lib/pgsql/ or somewhere, for -D option),
> 3). do pg_upgrade.
>
> Is that correct?
>
> Is there somewhere "guide for 9.x -> 10.x CONCEPTS changes (and upgrade)
> guide"? (clusters etc).

The pg_upgade docs have all the steps.

--
Bruce Momjian <bruce(at)momjian(dot)us> https://momjian.us
EnterpriseDB https://enterprisedb.com

The usefulness of a cup is in its emptiness, Bruce Lee