instructions.txt

INSTALLING POSTGRES:

sudo apt install postgresql postgresql-contrib

SETTING UP MULTIPLE INSTANCES OF THE DATABASE:

1. Create 5 new folders - primary, db01, db02, db03, db04, db05 (preferable in the directory /usr/local/postgres/)

2. Create clusters:

Run the following commands:

sudo chown -R <user_name> /var/run/postgresql/
cd /usr/lib/postgresql/10/bin/
./initdb -D <path to the created folder> -U <system_username> -W

run the last command for each of the created folders to set up a database in each of them.

3. Start the database server at ports 5440, 5441, 5442, 5443, 5444 respectively.

pg_ctl -D <path_to_primary> -o "-p 5440" start
pg_ctl -D <path_to_db01> -o "-p 5441" start
pg_ctl -D <path_to_db02> -o "-p 5442" start
pg_ctl -D <path_to_db03> -o "-p 5443" start
pg_ctl -D <path_to_db04> -o "-p 5444" start

INSTALLATION AND RUNNING THE PROJECT:

1. (Optional) Make sure Virtual Environment is installed in the system. Create a new virtual environment in the project directory and switch to the virtual environment. 
2. Run command -> pip install -r requirements.txt
3. Start the servers: (each command in a different terminal switched to the virtual environment)

python db01/manage.py runserver 9001
python db02/manage.py runserver 9002
python db03/manage.py runserver 9003
python db04/manage.py runserver 9004
python server/manage.py runserver 9000

4. Create superuser: python server/manage.py createsuperuser
   Enter valid details.

5. Goto 127.0.0.1:9000/admin and login as the superuser.
6. Goto the model database details and enter all database details.
7. Goto 127.0.0.1:9000/login