Ident authentication failed for user - ruby-on-rails

Question

I am trying to set up my rails app with a Postgres database which I am new to.
I am using
centos 6
postgresql 9.6.2
pg_hba.conf path => /var/lib/pgsql/data/pg_hba.conf
I had logged in with sudo -u postgres psql and created a user 'X' with password 'password'. Below are the details
postgres=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
--------------+--------------+----------+-------------+-------------+-------------------------------
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +
| | | | | postgres=CTc/postgres
trip_staging | X | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =Tc/X +
| | | | | X=CTc/X
(4 rows)
postgres=# \du
List of roles
Role name | Attributes | Member of
--------------+------------------------------------------------------------+-----------
X | | {}
postgres | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
When I run command:
RAILS_ENV=staging bundle exec rake db:create
I get the below error:
FATAL: Ident authentication failed for user "X"
Couldn't create database for {"database"=>"trip_staging", "adapter"=>"postgresql", "username"=>"X", "password"=>"password", "host"=>"localhost", "port"=>5432, "pool"=>5, "timeout"=>5000}
After this I looked up each possible fix for this. I tried changing the pg_hba.conf with below configuration:
TYPE DATABASE USER ADDRESS METHOD
local all all md5
host all all 0.0.0.0 md5
host all all ::1/128 md5
Also tried, changing METHOD with trust and then restarted the postgresql server with the command: sudo service postgresql-9.6 restart but same error.
Also tried, changing read permissions for path /var/lib/pgsql/data/pg_hba.conf from 600 to 755. To do that I had to login as postgres superuser with sudo su - postgres which is weird. Then restarted the postgresql server
Also tried, changing Method from ident to trust for path /var/lib/pgsql/9.6/data/pg_hba.conf, as apparently there exists a version wise pg_hba.conf too. Then I restarted the PostgreSQL server.
Nothing seemed to have worked so far. Please help find out what is missing.

Answer 1

In the pg_hba.conf the part of 0.0.0.0 needs the mask like this 0.0.0.0/32, in the log says the problem, wich is by default in centos in /var/lib/pgsql/9.6/data/pg_log/