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setup/doc/postgres.md

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Setup Postgres

  • install Postgres like this

  • create copy of config file pg_hba.conf file
    NOTE: Insert the postgresql version that is running on the respective host

cd /etc/postgresql/<psql version>/main/
sudo cp pg_hba.conf pg_hba.conf-backup
  • switch authentication method from peer to md5 for all local users connecting by Unix domain sockets by opening the following config file and adding the example configuration
sudo vi pg_hba.conf

# "local" is for Unix domain socket connections only
#local   all             all                                     peer
local   all             all                                     md5
  • restart PostgreSQL to enable the changes
systemctl status postgresql
sudo systemctl restart postgresql
systemctl status postgresql

TODO: move the following description to dedicated setup files

Allow Remote Connections

sudo ufw allow 5432
sudo ufw enable
sudo ufw status numbered
  • create config backup
sudo cp /etc/postgresql/<version>/main/postgresql.conf /etc/postgresql/<version>/main/postgresql.conf-backup
  • open config file to define what IP addresses postgres to listen on
sudo vi /etc/postgresql/<version>/main/postgresql.conf
  • edit config file like this
#listen_addresses = 'localhost'
listen_addresses = '*'
  • open config file to define access to all databases for all users with an encrypted key
sudo vi /etc/postgresql/<version>/main/pg_hba.conf
  • edit config file like this
# TYPE  DATABASE	USER	ADDRESS   	METHOD
host    all     	all     0.0.0.0/0       md5
host    all             all     :/0             md5
  • restart PostgreSQL to enable the changes
sudo systemctl restart postgresql
systemctl status postgresql

Disable Start Up At System Boot

  • If you install the PostgreSQL database from packages, it is automatically added to the start up scripts of the operating system. If you are only learning to work with the database, it is unnecessary to start the database each time you boot the system. Remove system startup link for the PostgreSQL database
sudo update-rc.d -f postgresql remove

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