[ovirt-users] Remote DB: How do you set server_version?

[Jamie Lawrence]

I've been down this road. Postgres won't lie about its version for you.  If you want to do this, you have to patch the Ovirt installer[1]. I stopped trying to use my PG cluster at some point -  the relationship between the installer and the product combined with the overly restrictive requirements baked into the installer[2]) makes doing so  an ongoing hassle. So I treat Ovirt's PG as an black box; disappointing, considering that we are a very heavy PG shop with a lot of expertise and automation I can't use with Ovirt.

If nothing has changed (my notes are from a few versions ago), everything you need to correct is in

/usr/share/ovirt-engine/setup/ovirt_engine_setup/engine_common/constants.py

Aside from the version, you'll also have to make the knobs for vacuuming match those of your current installation, and I think there was another configurable for something else I'm not remembering right now.

Be aware that doing so is accepting an ongoing commitment to monkeying with the installer a lot. At one time I thought doing so was the right tradeoff, but it turns out I  was wrong.

-j

[1] Or you could rebuild PG with a fake version. That option was unavailable here.
[2] Not criticizing, just stating a technical fact. How folks apportion their QA resources is their business.

> On May 2, 2018, at 12:49 PM, ~Stack~ <i.am.stack at gmail.com> wrote:
> 
> Greetings,
> 
> Exploring hosting my engine and ovirt_engine_history db's on my
> dedicated PostgreSQL server.
> 
> This is a 9.5 install on a beefy box from the postgresql.org yum repos
> that I'm using for other SQL needs too. 9.5.12 to be exact. I set up the
> database just as the documentation says and I'm doing a fresh install of
> my engine-setup.
> 
> During the install, right after I give it the details for the remote I
> get this error:
> [ ERROR ] Please set:
>          server_version = 9.5.9
>         in postgresql.conf on 'None'. Its location is usually
> /var/lib/pgsql/data , or somewhere under /etc/postgresql* .
> 
> Huh?
> 
> Um. OK.
> $ grep ^server_version postgresql.conf
> server_version = 9.5.9
> 
> $ systemctl restart postgresql-9.5.service
> 
> LOG:  syntax error in file "/var/lib/pgsql/9.5/data/postgresql.conf"
> line 33, n...n ".9"
> FATAL:  configuration file "/var/lib/pgsql/9.5/data/postgresql.conf"
> contains errors
> 
> 
> Well that didn't work. Let's try something else.
> 
> $ grep ^server_version postgresql.conf
> server_version = 9.5.9
> 
> $ systemctl restart postgresql-9.5.service
> LOG:  parameter "server_version" cannot be changed
> FATAL:  configuration file "/var/lib/pgsql/9.5/data/postgresql.conf"
> contains errors
> 
> Whelp. That didn't work either. I can't seem to find anything in the
> oVirt docs on setting this.
> 
> How am I supposed to do this?
> 
> Thanks!
> ~Stack~
> 
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