Postgresql : can't connect with new created users - postgresql

Question

Here's the error :
$ psql -h localhost -U kMbjQ6pR9G -d fzvqFILx0d
Password for user kMbjQ6pR9G:
psql: FATAL: password authentication failed for user "kMbjQ6pR9G"
FATAL: password authentication failed for user "kMbjQ6pR9G"
I'm probably missing a configuration step on using fresh PostgreSQL.
Here's the command lines I tried to create a new user with his own database :
sudo -u postgres bash -c "psql -c \"CREATE USER $USER WITH PASSWORD '$PASSWORD';\"" &&
sudo -u postgres bash -c "psql -c \"CREATE DATABASE $DB;\"" &&
sudo -u postgres bash -c "psql -c \"GRANT ALL PRIVILEGES ON DATABASE $DB to $USER;\"" &&
Here's the PostgreSQL configuration :
$ sudo grep -v ^# /etc/postgresql/9.5/main/pg_hba.conf |grep -v ^$
local all postgres md5
local all all md5
host all all 127.0.0.1/32 md5
host all all ::1/128 md5
Here's all the accound I created to test :
$ sudo -u postgres bash -c 'psql -c "select * from pg_shadow;"'
Password:
usename | usesysid | usecreatedb | usesuper | userepl | usebypassrls | passwd | valuntil | useconfig
------------+----------+-------------+----------+---------+--------------+-------------------------------------+----------+-----------
av6izmbp9l | 16384 | f | f | f | f | md5a49721ef3f5428e269badc03931baf48 | |
rqmejchq7n | 16386 | f | f | f | f | md54edf3a05ca96a435f94152b75495e9dc | |
yyfiknesu8 | 16388 | f | f | f | f | md5b3d4a03913569abbf318bdc490d0f821 | |
qgv2ryqvdw | 16390 | f | f | f | f | md5d0959b4b5e1ed2982e19e4d0af574b11 | |
postgres | 10 | t | t | t | t | md5xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx | |
pf09joszuj | 16392 | f | f | f | f | md5a920dc31666459e5f0a96e9430d07f02 | |
I think it something simple, but I miss this point.
Thanks for your support,
David.

Answer 1

Did you explicitly specify the database when trying to connect?
psql -h localhost -U myuser -d mydb
This is how I usually set up a user to completely own a given database:
create role myuser with createdb login encrypted password 'mypassword';
create database mydb with owner 'myuser' encoding 'utf8';
pg_hba.conf:
local myuser mydb md5
...

Answer 2

The problem was obvious : username & database names are lowercase !
Here's the script I use to create user and his own database :
#!/bin/bash
if [ -n "$1" ]; then
DB="$1"
else
DB=$(php -r "echo substr(str_shuffle(str_repeat('abcdefghijklmnopqrstuvwxyz', ceil(10/63) )),1,10);")
fi
USER=$(php -r "echo substr(str_shuffle(str_repeat('abcdefghijklmnopqrstuvwxyz', ceil(10/63) )),1,10);")
PASSWORD=$(php -r "echo substr(str_shuffle(str_repeat('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', ceil(20/63) )),1,20);")
sudo -u postgres psql -c "CREATE USER $USER WITH PASSWORD '$PASSWORD';"
sudo -u postgres psql -c "CREATE DATABASE $DB;"
sudo -u postgres psql -c "GRANT ALL PRIVILEGES ON DATABASE $DB to $USER;"
cat << EndOfMessage
POSTGRESQL_ADDON_DB="$DB"
POSTGRESQL_ADDON_HOST="localhost"
POSTGRESQL_ADDON_PASSWORD="$PASSWORD"
POSTGRESQL_ADDON_PORT="5432"
POSTGRESQL_ADDON_USER="$USER"
EndOfMessage
https://github.com/davidbouche/linux-install/blob/master/pgsql-database-create.sh
Thanks for your contribution.
David