Install or Update PostgreSQL® on Your cPanel & WHM Server

Overview

This document explains how to install or update PostgreSQL® on a server. However, we strongly recommend that you allow an experienced PostgreSQL database administrator to perform this process.

Important:
We only support versions of PostgreSQL that you install with the /usr/local/cpanel/scripts/installpostgres script. We do not support versions of PostgreSQL that you install via any other method.
Note:
cPanel & WHM functions with the version of PostgreSQL that ships with your operating system.

Back up databases

Before you install or update PostgreSQL on your server, back up your server’s databases. This action allows you to restore your databases after you install or update PostgreSQL.

To back up your databases, log in to your server as the root user via SSH and perform the following steps:

  1. Back up the PostgreSQL databases on your server. To do this, run the following command: 

    pg_dumpall -U postgres > db.out
    Note:
    In this example, db.out represents the database backup file.

  2. To revert to your previous version of PostgreSQL, move your current PostgreSQL data directory. To do this, run the following commands: 

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      service postgresql stop
  mv /var/lib/pgsql /var/lib/directory_file_name
    Note:
    • In this example, /directory_file_name represents the actual directory name.
    • If you enabled the Monitor option through WHM’s Service Manager interface (WHM >> Home >> Service Configuration >> Service Manager), deselect the checkbox in the Monitor column before you run this command. This action prevents an automatic restart of the PostgreSQL service after you stop it.

Install or upgrade and configure PostgreSQL

To install or upgrade and configure PostgreSQL on your server, perform the following steps:

  1. Run the /usr/local/cpanel/scripts/installpostgres command to install or upgrade PostgreSQL.

  2. Access WHM’s Configure PostgreSQL interface (WHM >> Home >> SQL Services >> Configure PostgreSQL).

  3. Click Install Config if PostgreSQL does not exist on your server.

    Warning:
    If a PostgreSQL configuration already exists on your server, this action overwrites your configuration authentication file.

  4. Click Create Users to add current cPanel users to PostgreSQL.

  5. Enter a new password in the Enter New Password text box.

  6. Confirm your new password, and click Change Password.

    Warning:
    Only use letters and numbers. Non-alphanumeric characters can cause errors to occur.

  7. Import your databases. To do this, run the following command: 

    psql -U postgres dbname < dumpfile.sql

Restore a previous PostgreSQL version

If the new installation fails, revert to your previous version of PostgreSQL and restore the earlier PostgreSQL data directory. To do this, run the following commands:

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service postgresql stop
mv /var/lib/pgsql /var/lib/directory_file_name
mv /var/lib/pgsql.old /var/lib/pgsql
service postgresql restart

For more information about PostgreSQL, visit the PostgreSQL website.