Amazon Aurora PostgreSQL

Prerequisites

• IP address or host name of your PostgreSQL server is available.

• The PostgreSQL version is 9.6 or higher.

• If ingestion mode is Logical Replication:

  • The database that you are connecting is a master instance. Amazon Aurora PostgreSQL does not support logical replication on read replicas.

  • Log-based incremental replication is enabled.

• Hevo’s IP addresses are whitelisted.

• SELECT, USAGE, and CONNECT privileges are granted to the database user.

  Note: We recommend that you create a database user for configuring your Amazon Aurora PostgreSQL Source in Hevo. However, if you already have one, refer to section Grant privileges to the user.

• You are assigned the Team Administrator, Team Collaborator, or Pipeline Administrator role in Hevo, to create the Pipeline.

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Perform the following steps to configure your Amazon Aurora PostgreSQL Source:

Set up Log-based Incremental Replication

1. Create a parameter group

1. Log in to the Amazon RDS console.

2. In the left navigation pane, select Parameter groups.

3. In the Parameter groups page, click Create parameter group.

4. In the Create parameter group page, perform the following steps:

   1. Select an aurora-postgresql version from the Parameter group family drop-down.

      

   2. Select DB Cluster Parameter Group from the Group Name drop-down.

      

   3. Specify the Group Name and Description, and then click Create.

      

   You have successfully created a parameter group.

2. Configure the parameters

1. In the Parameter groups page, select the check box corresponding to the parameter group that you created above.

   

2. In the Actions drop-down, click Edit.

   

3. In the page that appears, search and update the value of the following parameters:

   

   Parameter	Value	Description
   max_replication_slots	5	The number of clients that can connect to the server. Default value: 10. RDS recommends to set this value to at least 5 so that internal replication by RDS is not affected.
   rds.logical_replication	1	The setting to enable or disable logical replication. The value of 1 is required to enable write-ahead logging (WAL) at the logical level.
   wal_sender_timeout	0	The time, in seconds, after which PostgreSQL terminates the replication connections due to inactivity. Default value: 60 seconds. You must set the value to 0 so that the connections are never terminated and your Pipeline does not fail. You can use the following query to check the value configured for the parameter: show wal_sender_timeout

3. Apply the parameter group to your PostgreSQL database

1. In your Amazon RDS console, click Databases in the left navigation pane.

2. In the Databases page, click the DB identifier for your database, and the, Modify.

3. Select the DB cluster parameter group you just created.

4. Set the backup retention period to at least 3 days. This setting defines the number of days for which automated backups are retained.

   

5. For the changes to take effect, reboot the DB instance.

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Whitelist Hevo’s IP Addresses

You need to whitelist the Hevo IP addresses for your region to enable Hevo to connect to your PostgreSQL database.

To do this:

1. Add inbound rules

1. Open the Amazon RDS console.

2. In the left navigation pane, click Databases (or Instances if you’re using an older version).

3. In the Databases section on the right, click the DB identifier of the Amazon Aurora instance to configure a security group on.

   

4. In the Connectivity & security tab, click the link text under Security, VPC security groups.

   

5. In the Actions drop-down on the top right, click Edit inbound rules.

   

6. In the Edit inbound rules page:

   1. Click Add rule.

   2. Add a new rule with Hevo’s IP addresses for your region to give access to the PostgreSQL instance.

   3. Click Save rules.

      

2. Configure Virtual Private Cloud (VPC)

1. In the Amazon RDS console, click the VPC link text.

   

2. In the Your VPCs page, click on the VPC ID, and then, the Network ACL link.

   

3. Click the Inbound Rules tab and ensure that the IP addresses you added have a setting of ALLOW.

   

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Create a Database User and Grant Privileges

1. Create a database user (Optional)

2. Grant privileges to the user

Grant privileges to the database user connecting to the PostgreSQL database as follows:

1. Log into your Amazon Aurora PostgreSQL database as a user with grant privilege.

2. Enter the following commands to give accesses to the database user:

    GRANT CONNECT ON DATABASE <database_name> TO <database_username>;
    GRANT USAGE ON SCHEMA <schema_name> TO <database_username>;
   

3. Alter the schema’s default privileges to grant SELECT privileges on tables to the database user:

    ALTER DEFAULT PRIVILEGES IN SCHEMA <schema_name> GRANT SELECT ON TABLES TO <database_username>;
   

   Note: If you want to use Log-based Incremental Replication, grant the rds_replication role to the database user. Log in to the database as a user with the rds_superuser role and run the following command:

    GRANT rds_replication TO <database_username>;
   

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