By default, on CentOS 7, the PostgreSQL v10 data directory is located in /var/lib/pgsql/10/data.
Here’s a simple trick to easily place it somewhere else without using symbolic links.
First of all, install PostgreSQL 10:
# yum install -y https://download.postgresql.org/pub/repos/yum/10/redhat/rhel-7-x86_64/pgdg-centos10-10-2.noarch.rpm
# yum install -y postgresql10-server
If you wish to place your data in (e.g.) /pgdata/10/data, create the directory with the good rights:
# mkdir -p /pgdata/10/data
# chown -R postgres:postgres /pgdata
Then, customize the systemd service:
# systemctl edit postgresql-10.service
Add the following content:
[Service]
Environment=PGDATA=/pgdata/10/data
This will create a /etc/systemd/system/postgresql-10.service.d/override.conf file which will be merged with the original service file.
To check its content:
# cat /etc/systemd/system/postgresql-10.service.d/override.conf
[Service]
Environment=PGDATA=/pgdata/10/data
Reload systemd:
# systemctl daemon-reload
Initialize the PostgreSQL data directory:
# /usr/pgsql-10/bin/postgresql-10-setup initdb
Start and enable the service:
# systemctl enable postgresql-10
# systemctl start postgresql-10
And Voila! It’s just that simple.
This article has been improved thanks to @darixzen: https://discourse.nordisch.org/t/epmd-and-systemd/434.
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