How to configure multiple PostgreSQL-9
- 1. How to configure multiple PostgreSQL-9.3 instances on same server -- Vivek Singh
- 2. Multiple PostgreSQL Instances on Same Server • Steps to Create Multiple PostgreSQL Instances on Same Server • Below are the steps to create two instances of Postgresql 9.3 version on same machine. • In this example, one instance is for "env1" environment and the other one is for "env2". • 1. Create two copies of Postgres init files, one for each environment: • cd /etc/init.d/ • cp postgresql-9.3 postgresql-env1 • cp postgresql-9.3 postgresql-env2 • mv postgresql-9.3 postgresql-old
- 3. Multiple PostgreSQL Instances on Same Server • 2. Create 2 files of same postgres init file names in /etc/sysconfig/pgsql/ • cat > /etc/sysconfig/pgsql/postgresql-env1 <<EOF • PGENGINE=/usr/pgsql-9.3/bin • PGPORT=5432 • PGDATA=/var/lib/pgsql/9.3/env1/data • PGLOG=/var/lib/pgsql/9.3/pgstartup.5432.log • EOF • cat > /etc/sysconfig/pgsql/postgresql-env2 <<EOF • PGENGINE=/usr/pgsql-9.3/bin • PGPORT=5433 • PGDATA=/var/lib/pgsql/9.3/env2/data • PGLOG=/var/lib/pgsql/9.3/pgstartup.5433.log • EOF
- 4. Multiple PostgreSQL Instances on Same Server • 3. Initialise the data directories for both instances: • /etc/init.d/postgresql-env1 initdb • /etc/init.d/postgresql-env2 initdb • 4. Change port is postgresql.conf files: • echo "port = 5432" >>/var/lib/pgsql/9.3/env1/data/postgresql.conf • echo "port = 5433" >>/var/lib/pgsql/9.3/env2/data/postgresql.conf
- 5. Multiple PostgreSQL Instances on Same Server • 5. Start both postgres services: • cd /etc/init.d • service postgresql-env1 start • service postgresql-env2 start • 6. Add services to start up on reboot: • chkconfig add postgresql-env1 • chkconfig add postgresql-env2 • chkconfig postgresql-env1 on • chkconfig postgresql-env2 on
- 6. Multiple PostgreSQL Instances on Same Server • 7. Verify ports by psql commands: • $ psql -p5432 -c "select name, setting from pg_settings where name ='port'" • name | setting • port | 5432 • $ psql -p5433 -c "select name, setting from pg_settings where name ='port'" • name | setting • port | 5433
- 7. Multiple PostgreSQL Instances on Same Server • 8. Verify postmaster processes: • $ ps -ef | grep postmaster • postgres 26200 1 0 21:15 ? 00:00:00 /usr/pgsql-9.3/bin/postmaster -p 5432 -D /var/lib/pgsql/9.3/env1/data • postgres 26265 1 0 21:16 ? 00:00:00 /usr/pgsql-9.3/bin/postmaster -p 5433 -D /var/lib/pgsql/9.3/env2/data