On 2011-06-15 05:01, Bruce Momjian wrote:
> You might remember we added a postmaster/postgres -b switch to indicate
> binary upgrade mode. The attached patch prevents any client without an
> application_name of 'binary-upgrade' from connecting to the cluster
> while it is binary upgrade mode. This helps prevent unauthorized users
> from connecting during the upgrade. This will not help for clusters
> that do not have the -b flag, e.g. pre-9.1.
>
> Does this seem useful? Something for 9.1 or 9.2?
>
> This idea came from Andrew Dunstan via IRC during a pg_upgrade run by
> Stephen Frost when some clients accidentally connected. (Stephen reran
> pg_upgrade successfully.)
Couldn't the -b flag also imply a very strict hba.conf configuration, that
essentially only lets pg_upgrade in..?
--
Jesper