Re: Upgrade 9.5 cluster on Ubuntu 16.04

On 9/2/21 11:55 AM, Vano Beridze wrote:
> I just want to upgrade to the OS and Postgres that is supported.
> If I just stop the service on both VMs and upgrade Ubuntu, then start 
> Postgres, will it work or I should go with clean install and dump/restore?

Prudent behavior before you do any upgrading would be to:

1) Take pg_dumpall of cluster just before shutting it down.

2) Copy that dump off the VM's for extra safety.

Then you have choice of:

1) On new upgraded OS there will be a new 10 cluster created that has 
only the template0, template1 and postgres databases. psql -f dump.sql 
postgres per example here 
https://www.postgresql.org/docs/10/app-pg-dumpall.html

2) Or use the pg_upgrade procedure shown here:

https://askubuntu.com/questions/1126847/will-a-release-upgrade-take-care-of-postgresql-upgrade-automatically

I would say if the database(s) are not that big I would go with 1).

> 
> On Thu, Sep 2, 2021 at 10:41 PM Adrian Klaver <adrian.klaver@aklaver.com 
> <mailto:adrian.klaver@aklaver.com>> wrote:
> 
>     On 9/2/21 11:34 AM, Vano Beridze wrote:
>      >  > What repo are you getting Postgres from, Ubuntu or PGDG?
>      > Ubuntu
> 
>     So you are going to get version 10.
> 
>     Is that what you want?
> 
>     If you want to move to something newer then this maybe the time to move
>     to the PGDG repos, as they allow you to install any of the current
>     supported versions of Postgres.
> 
> 
> 
> 
>     -- 
>     Adrian Klaver
>     adrian.klaver@aklaver.com <mailto:adrian.klaver@aklaver.com>
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com