Customize your AlloyDB Omni installation

This page shows you how to download, install, and connect to AlloyDB Omni. To get started quickly with AlloyDB Omni using the default configuration, see Install AlloyDB Omni on Debian or Ubuntu.

In this document, you also learn how to do the following:

• Create a new disk partition to optimize data storage.
• Configure your server.
• Ensure compatibility with Debian, Ubuntu, and RHEL.

Before you begin

Download and install AlloyDB Omni

1. Install the AlloyDB Omni CLI.

2. Use the AlloyDB Omni CLI to confirm that your Linux machine is ready to install AlloyDB Omni:

   sudo alloydb system-check

   If needed, modify your system until the output of the system-check command returns a successful check.

3. Optional: To create a new disk partition for AlloyDB Omni to use for data storage, we recommend that you use an ext4 file system for optimal performance.

   1. To create an ext4 file system, use the following command:

      mkfs.ext4 -m 1 -F "$disk_path"

   2. To mount your disk, use the following command:

      mount --make-shared -o noatime,discard,errors=panic "$disk_path" "$disk_mountpoint"

4. Install the server software using one of the following options:

   • To configure the server as a primary instance, run the following command:

     sudo alloydb database-server install --data-dir=$(realpath DATA_DIR)

     Replace DATA_DIR with the directory on your local file system where you want AlloyDB Omni to store its data, metadata, and configuration files. AlloyDB Omni tries to create this directory if it doesn't already exist. If you don't specify this value, then AlloyDB Omni defaults to /var/alloydb/main/.

     To have AlloyDB Omni listen for connections on a TCP port other than the default 5432, include the --pg-port flag:

     sudo alloydb database-server install \
         --data-dir=$(realpath DATA_DIR) \
         --pg-port=PORT

     Replace PORT with the TCP port that you want AlloyDB Omni to accept connections on.

   • To configure the server as a read replica, include the --replica-source-ip and --replica-source-port flags:

     sudo alloydb database-server install \
         --data-dir=$(realpath DATA_DIR) \
         --replica-source-ip=SOURCE_IP \
         --replica-source-port=SOURCE_PORT

     Replace the following:

     • DATA_DIR: the directory on your local file system where you want AlloyDB Omni to store its data, metadata, and configuration files. AlloyDB Omni tries to create this directory if it doesn't already exist. If you don't specify this value, then AlloyDB Omni defaults to /var/alloydb/main/.

     • SOURCE_IP: the IP address of the primary AlloyDB Omni instance to replicate from.

     • SOURCE_PORT: the TCP port of the primary AlloyDB Omni instance to replicate from. If you don't provide this value, then AlloyDB Omni applies a default value of 5432.

     For more information on AlloyDB Omni read replicas, see Create a read-only replica.

5. If your system runs Red Hat Enterprise Linux, then update the /usr/lib/tuned/virtual-guest/tuned.conf file with the following:

   vm.swappiness=1
   

Connect to and use the database server

Connect to AlloyDB Omni using psql:

sudo docker exec -it pg-service psql -h localhost -U postgres

The terminal window displays psql login text that ends with a postgres=# prompt.