Fedora, CentOS, or Red Hat

This section describes the steps needed to set up a single-node Citus cluster on your own Linux machine from RPM packages.

1. Install PostgreSQL 14 and the Citus extension

  1. # Add Citus repository for package manager
  2. curl https://install.citusdata.com/community/rpm.sh | sudo bash
  4. # install Citus extension
  5. sudo yum install -y citus102_14

2. Initialize the Cluster

Let’s create a new database on disk. For convenience in using PostgreSQL Unix domain socket connections, we’ll use the postgres user.

  1. # this user has access to sockets in /var/run/postgresql
  2. sudo su - postgres
  4. # include path to postgres binaries
  5. export PATH=$PATH:/usr/pgsql-14/bin
  7. cd ~
  8. mkdir citus
  9. initdb -D citus

Citus is a Postgres extension. To tell Postgres to use this extension you’ll need to add it to a configuration variable called shared_preload_libraries:

  1. echo "shared_preload_libraries = 'citus'" >> citus/postgresql.conf

3. Start the database server

Finally, we’ll start an instance of PostgreSQL for the new directory:

  1. pg_ctl -D citus -o "-p 9700" -l citus_logfile start

Above you added Citus to shared_preload_libraries. That lets it hook into some deep parts of Postgres, swapping out the query planner and executor. Here, we load the user-facing side of Citus (such as the functions you’ll soon call):

  1. psql -p 9700 -c "CREATE EXTENSION citus;"

4. Verify that installation has succeeded

To verify that the installation has succeeded, and Citus is installed:

  1. psql -p 9700 -c "select citus_version();"

You should see details of the Citus extension.

At this step, you have completed the installation process and are ready to use your Citus cluster. To help you get started, we have a tutorial which has instructions on setting up a Citus cluster with sample data in minutes.