Re: [PATCH] Make pg_basebackup configure and start standby

Peter Eisentraut <peter_e@gmx.net>

From: Peter Eisentraut <peter_e@gmx.net>
To: Fujii Masao <masao.fujii@gmail.com>
Cc: Magnus Hagander <magnus@hagander.net>, Boszormenyi Zoltan <zb@cybertec.at>, pgsql-hackers@postgresql.org, Hans-Jürgen Schönig <hs@cybertec.at>
Date: 2012-07-03T19:47:29Z
Lists: pgsql-hackers
On mån, 2012-07-02 at 01:10 +0900, Fujii Masao wrote:
> > But I think that part is lacking in functionality: AFAICT it's
> > hardcoded to only handle host, port, user and password. What about
> > other connection parameters, likely passed to pg_basebackup through
> > the environment in that case? isn't that quite likely to break the
> > server later?
> 
> What about something like PQconninfo which returns the connection
> string value established at connection?
> 
> > Maybe the proper way around that is to provide the ability for
> > pg_basebackup to take a full connection string, just like we allow
> > psql to do?
> 
> +1
> 
I think both of these would be necessary to make this work smoothly.

You also need to take into account situations like when pg_basebackup
found a server with the help of PG* environment variables that might no
longer be set when the server tries to start recovery.  So you need
something like PQconninfo.