# System Requirements for Alibaba Cloud ApsaraDB RDS for PostgreSQL

To back up and restore PostgreSQL data on an Alibaba application, verify that your environment has the required software and a firewall.

## Software Requirements

- Packages required on access nodes:

  - Virtual Server Agent

  - PostgreSQL Agent

- Access nodes that you run backup and restore operations on must have one of the following operating systems:

  - CentOS 9.x, 8.x

  - Oracle Linux Enterprise 9.x, 8.x

  - Red Hat Enterprise Linux 9.x, 8.x

  - Rocky Linux 9.x, 8.x

  - Windows 2022, 2019, 2016

  Note

  - If you have network configuration enabled on the access nodes, before you deploy a Windows or a Linux proxy, configure a firewall on the cloud proxy and on-premises. For more information, see Configuring a Firewall to Install the Virtual Server Agent on a Cloud VM or Instance.

  - Containers can serve as access nodes as long as the PostgreSQL server is accessible from the container environment. For more information about setting up an access node container, see Installing Commvault Packages in Kubernetes Using Helm.

## User Account Requirements

- For DumpBasedBackupSet, verify that the PostgreSQL instance has a user account with sufficient privileges to perform the following:

  - Perform backup and restore operations of the database objects as part of the subclient content

    The following table illustrates the necessary privileges the user account should have to perform backup and restore operations:

    Operations | Privileges PostgreSQL User Should Have
    --- | ---
    Backup | LOGIN
    Restore | CREATEDB, CREATEROLE, INHERIT, LOGIN

    CONNECTION LIMIT, if set, should at least have a value of 2.

    Initially, the user account credentials are provided during the instance configuration after the installation of the agent. You can change the user account at the instance level.

    Note

    You may need to grant other privileges to the PostgreSQL backup user to secure the objects in the database. To know more about database roles and privileges, see PostgreSQL documentation.

- You require SELECT privileges on all tables and objects within the schema or databases being backed up.

  The following statements are valid for PostgreSQL:

  - Version 14 or above

    - GRANT pg_read_all_data to user_name;

  - Version 13 or below

    - GRANT SELECT ON ALL TABLES IN SCHEMA schema_name TO user_name;

## Alibaba User Permissions

Download the alicloud_min_permission_policy.json file and use it on the Alibaba command line to apply all of the required permissions for backups and restores.

## Supported PostgreSQL Version

From PostgreSQL version 12.x to version 18.x.

Note

- The PostgreSQL version 15.x support is added with Commvault Maintenance Release 11.32.16 (or a more recent version).

- The PostgreSQL version 16.x support is added with Commvault Maintenance Release 11.32.55 (or a more recent version).

- The PostgreSQL version 16.x support is added with Commvault Maintenance Release 11.36.32 (or a more recent version).

- The PostgreSQL version 18.x support is added with Commvault Maintenance Release 11.42.41 (or a more recent version).

## SSL and TLS Support

The supported TLS versions to create Alibaba SSL encrypted PostgreSQL instances are TLS 1.0, 1.1 and 1.2.

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