Problems connecting to PostgreSQL

[Cecil Westerhof]

On Sunday  8 Nov 2015 09:36 CET, Chris Warrick wrote:

> On 8 November 2015 at 00:40, Cecil Westerhof <Cecil at decebal.nl> wrote:
>> I followed http://zetcode.com/db/postgresqlpythontutorial/.
>>
>> I used:
>> sudo -u postgres createuser stressTest
>> this create the role, but also gave:
>> could not change directory to "/root": Permission denied
>> and I did not get the questions.
>
> This is not an error, just a warning — and it comes from sudo,
> postgres doesn’t care. To silence it, you need to work from a
> different directory than /root.  The commands actually worked just
> fine.
>
>> Then I used:
>> sudo -u postgres createdb stressTest -O stressTest
>> This gave also:
>> could not change directory to "/root": Permission denied
>>
>> The database is created, but when I execute: conn =
>> psycopg2.connect(database = postgres_database, user = 'stressTest')
>> I get: psycopg2.OperationalError: FATAL: Peer authentication failed
>> for user "stressTest"
>>
>> What do I need to do to get things working?
>
> You need to configure your PostgreSQL database to use md5
> authentication, and set a password for your user.
>
> # cd /
> # sudo -u postgres psql
> postgres=# ALTER ROLE stressTest WITH PASSWORD 'swordfish';
> postgres=# \q
> # vim /var/lib/postgres/data/pg_hba.conf
>
> Change host settings to look like this:
> # IPv4 local connections:
> host    all             all             127.0.0.1/32            md5
> # IPv6 local connections:
> host    all             all             ::1/128                 md5
>
> Then you can connect using:
>
> conn = psycopg2.connect(database='stressTest', user='stressTest',
> password='swordfish', host='localhost')

Thanks. The file to edit on my system is:
    /var/lib/pgsql/data/pg_hba.conf
and it also looks like I cannot use mixed case. But at the moment I
have it working. I will delve deeper into it later.

-- 
Cecil Westerhof
Senior Software Engineer
LinkedIn: http://www.linkedin.com/in/cecilwesterhof