On Wed, Oct 12, 2016 at 3:41 PM Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
On 10/12/2016 02:07 AM, arnaud gaboury wrote:
>
>
> On Tue, Oct 11, 2016 at 4:20 PM Tom Lane <tgl@xxxxxxxxxxxxx
> <mailto:tgl@xxxxxxxxxxxxx>> wrote:
>
> arnaud gaboury <arnaud.gaboury@xxxxxxxxx
> <mailto:arnaud.gaboury@xxxxxxxxx>> writes:
>
> > I am a little confused about some of my settings when it comes to map
>
> > linux/psql users.
> I think you're misunderstanding what the user-mapping stuff does.
>
> It does not silently translate the username in the connection request
>
> to something else; rather, it checks whether a user having the given
>
> external name is allowed to log in as a particular Postgres user.
>
> So there's nothing particularly wrong with your config files, but your
>
>
> Then, if my files are correct, why can't I connect ?
>
> % psql --dbname=mattermost --username=mmuser
> psql: FATAL: Peer authentication failed for user "mmuser"
What system user are you doing the above as?
>
> login with postgres is OK (pg_hba.conf settings: local
> all postgres trust):
> % psql --dbname=mattermost --username=postgres
> psql (9.5.4)
> Type "help" for help.
>
> mattermost=# \q
>
> I can't see why I can't connect as Postgresuser mmuser.
>
>
Common issues:
1) You have more then one Postgres cluster and you are not connecting to
the one you think you are.
2) pg_hba.conf works on first match wins, so you have another line that
matches the criteria but is not pointing at the correct map.
You had it working here:
https://www.postgresql.org/message-id/CAK1hC9uLhsyn4g8Fc1FwhnDQzNx9k115GkK9iFKHepfjeMc%2Beg%40mail.gmail.com
So other then adding the mapping for the dovecot user, did anything else
change?
after a little bit of cleaning and a change in my Postgres username (now postgres username == unix user), the various commands to connect are working.
Now I want to be sure to have correctly understood the mapping story. Say root is running myApp, and at one point, myApp is poling a postgresql DB as user myUser.
Run myApp as root:
# myApp
Do I have to add an entry in pg_ident to map linux user root to Postgres myUser ? Or the command above will be enough with no entries in pg_ident or pg_hba ?
TY for your time.
>
>
> regards, tom lane
>
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
