Thread: [HACKERS] Odd listen_addresses behavior

-hackers,

I found this today:

jd@jd-wks:~/snap/postgresql96/common/data$ 
/snap/postgresql96/19/usr/bin/pg_ctl -D data stop
pg_ctl: directory "data" does not exist

jd@jd-wks:~/snap/postgresql96/common/data$ cd ..

jd@jd-wks:~/snap/postgresql96/common$ 
/snap/postgresql96/19/usr/bin/pg_ctl -D data stop
waiting for server to shut down...LOG:  received fast shutdown request
.LOG:  aborting any active transactions
LOG:  autovacuum launcher shutting down
LOG:  shutting down
LOG:  database system is shut down done
server stopped

jd@jd-wks:~/snap/postgresql96/common$ grep listen_addresses 
data/postgresql.conf
listen_addresses = '192*'        # what IP address(es) to listen on;

-- I wasn't actually expecting the above to work. I was just testing.


jd@jd-wks:~/snap/postgresql96/common$ 
/snap/postgresql96/19/usr/bin/pg_ctl -D data start
server starting

jd@jd-wks:~/snap/postgresql96/common$ postgresql96.psql -U jd -h 
localhost postgres
psql (9.6.2)
Type "help" for help.

postgres=# show listen_addresses ; listen_addresses
------------------ *
(1 row)


I grant that this is obscure but perhaps we should do something about it?

Thanks,

JD

-- 
Command Prompt, Inc.                  http://the.postgres.company/                        +1-503-667-4564
PostgreSQL Centered full stack support, consulting and development.
Everyone appreciates your honesty, until you are honest with them.
Unless otherwise stated, opinions are my own.

"Joshua D. Drake" <jd@commandprompt.com> writes:
> jd@jd-wks:~/snap/postgresql96/common$ grep listen_addresses
> data/postgresql.conf
> listen_addresses = '192*'        # what IP address(es) to listen on;

> -- I wasn't actually expecting the above to work. I was just testing.

Fails as expected for me:

$ postgres --listen-addresses='192*'
2017-03-15 15:50:11.024 EDT [3852] LOG:  could not translate host name "192*", service "5432" to address: Name or
servicenot known 
2017-03-15 15:50:11.024 EDT [3852] WARNING:  could not create listen socket for "192*"
2017-03-15 15:50:11.024 EDT [3852] FATAL:  could not create any TCP/IP sockets
2017-03-15 15:50:11.024 EDT [3852] LOG:  database system is shut down


> postgres=# show listen_addresses ;
>   listen_addresses
> ------------------
>   *
> (1 row)

I'm suspicious that you have an override of listen_addresses somewhere ---
for instance, the "-i" postmaster command line switch effectively is
--listen-addresses='*'.  Even if you had a version of getnameinfo() that
failed to complain about '192*', that would not cause the recorded value
of the string GUC to silently transmogrify into something else.  You might
look into pg_settings to see where it says that value of listen_addresses
came from.
        regards, tom lane

On 03/15/2017 12:57 PM, Tom Lane wrote:

> I'm suspicious that you have an override of listen_addresses somewhere ---
> for instance, the "-i" postmaster command line switch effectively is
> --listen-addresses='*'.

Yep.... postgresql.auto.conf.

Thanks, sorry for the noise.

JD

-- 
Command Prompt, Inc.                  http://the.postgres.company/                        +1-503-667-4564
PostgreSQL Centered full stack support, consulting and development.
Everyone appreciates your honesty, until you are honest with them.
Unless otherwise stated, opinions are my own.