Re: Postgres on Unix/Debian - seeking "dummies guide"

Jayadevan, Andrej, Fabio

Sincere thanks to all of you for your suggestions ... I will fumble around
for the next few hours and see how I go.

It has been bizarre being competent in the Windows universe - but an utter
novice in Unix. Reduced to a complete novice.

The postgresql.conf is stock standard out of the box.
I might change ...
#listen_addresses = 'localhost'
listen_addresses = '*'

pg_hba.conf
- currently as follows, so I will change these to trust ....
# "local" is for Unix domain socket connections only
local all all peer
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5

I'm just surprised that pgAdmin is connecting from "damian", but the java
app is not.

I'm sure I'l be back seeking clarification soon!

Cheers,
-Damian

On 11 June 2018 at 17:25, Fabio Pardi <f(dot)pardi(at)portavita(dot)eu> wrote:

> Hi Damian,
>
>
> given the error you posted, looks like the error is not OS related.
>
> It says that you are connecting from/to localhost but the password is
> wrong.
>
> Probably you want to run an 'ALTER USER ... WITH PASSWORD ..'
>
> Since your postgres user is not able to connect too, I would first change
> pg_hba.conf to
>
> host all postgres 127.0.0.1/32 trust
>
> (and reload postgres..)
>
>
> so that you do not need a password when connecting as postgres user.
>
> Then from there, connect as user postgres to your db
>
>
> psql -U postgres -h localhost postgres
>
>
> change the passwords you need to change..
>
> reconfigure your pg_hba based on your needs, reload postgres one more
> time and try to connect again.
>
>
> regards,
>
>
> fabio pardi
>
>
>
>
>
> On 11/06/18 07:04, Damian Carey wrote:
>
> Hi all,
>
> Utter newbie question. There will be no single answer - so if anyone could
> just point me in the right direction with a "recipe" I would be most
> grateful.
>
> In summary ...
> ===========
> - for last 10 years been Windows based with a java desktop accessing
> Postres with no issues at all
> - currently trying to port the app to Debian
> - it's 20+ years since I last used *nix
> - After several days - I still can't get the java app on (say) Debian user
> "damian" to access the db that is running as Debian user "postgres".
> PgAdmin3 works fine from "damian", but not the java app with the same user
> & pwds.
> - seeking any beginner clues / recipie for the most basic setup to get it
> working
> - not looking for "best practice", just an effective guide to what would
> work for initial dev phase.
>
>
> In more detail ...
> =============
> Our distributed Java desktop app uses Postgres as its DB, and has been on
> Windows for many years, and that process (dev to deployment) is completely
> solid. In the target industry all customers must be on Windows, hence so is
> our dev environment.
>
> My current task is porting to Debian - but it's my first Unix since 1993
> when I played on Solaris - so my familiarity has long gone and I'm fumbling
> the basics. For the life of me I can't get the app to get access to the DB.
>
> For these trials I'm using Debian on VirtualBox. I don't think that would
> be relevant.
>
> I *think* it is only a matter of users, permissions, roles, groups, pwds
> etc - but after following 10+ tutorials and 2 days of trying I am
> officially struggling. Particularly roles and groups, these are in the
> tutorials, but
>
> I just want to get the most basic case working, and I can scale from there.
>
> 2 Debian users / passwords
> - postgres / pgpwd
> - damian / mypwd
>
> DB added to PG
> - db name: mydb
> - db owner: postgres
>
>
> PostgreSQL installed for user postgres - all good
>
> for user damian
> 1. PgAdmin3 installed and connects to DB nicely
> 2. Java app installed and running properly in every way except it is
> denied access to the DB
>
> Even if I use dbuser: "postgres" and dbpwd: "pgpwd" the logs say ...
> <logs>
> Connection matched pg_hba.conf line 92: "host all all 127.0.0.1/32 md5"
> postgres(at)qdb FATAL: password authentication failed for user "postgres"
> postgres(at)qdb DETAIL: Password does not match for user "postgres".
> </logs>
>
> - What username and password is PG expecting?
> - is this expecting a role to be created or something?
>
> Any clues would be much appreciated.
>
> Thanks,
> -Damian
>
>
>
>
>
>
>