Connecting to an AWS RDS database
How to connect Sequin to an AWS RDS database
This guide provides step-by-step instructions to connect your AWS RDS database to Sequin.
Enable logical replication on RDS
By default, logical replication is not enabled on RDS. You can double check if logical replication is enabled by connecting to your database and running the following command:
SHOW rds.logical_replication;
If the output is off
, then logical replication is not enabled.
To enable it, follow these steps:
Create an RDS parameter group
In the AWS RDS console, create a new parameter group for your database (RDS > Parameter groups > Create parameter group):
- Parameter group family: Select your Postgres version.
- Parameter group name: Enter a name for your parameter group.
- Description: Optionally, enter a description for your parameter group.
Enable logical replication
Edit the parameter group to enable logical replication by setting rds.logical_replication
to 1
:
Apply the parameter group to your database
Open your database options (RDS > Databases > Modify) Then set the DB parameter group to the parameter group you created in the previous step. Select to Apply immediately.
Restart your database
Navigate to your database (RDS > Databases) and click on your database instance. Then click on the Actions button and select Reboot.
Connect Sequin to your RDS database
After enabling logical replication on RDS, you’ll now connect to your database in Sequin.
Enter connection details in Sequin
In the Sequin Console, click on the Connect Database button and enter the credentials for your RDS database:
You can find these connection details in your RDS console under the Connectivity & security section. For security reasons, we recommend using a read-only database user for the connection:
CREATE ROLE [username] WITH LOGIN NOSUPERUSER NOCREATEDB NOCREATEROLE NOREPLICATION PASSWORD '[password]';
- Host: Your RDS host (e.g.,
mydbinstance.abcdefghijkl.us-west-2.rds.amazonaws.com
) - Port: 5432 (default Postgres port)
- Database: Your database name
- Username: Your database username
- Password: The password for your database user
Make sure to enable the SSL option for secure connection.
Create a replication slot
Connect to your database using the SQL client of your choice and execute the following SQL query to create a replication slot:
SELECT pg_create_logical_replication_slot('sequin_slot', 'pgoutput');
This creates a replication slot named sequin_slot
.
Create a publication
Next, create a publication to indicate which tables will publish changes to the replication slot. Run the following SQL command:
CREATE PUBLICATION sequin_pub FOR TABLE table1, table2, table3;
If you want to publish changes from all tables, you can use:
CREATE PUBLICATION sequin_pub FOR ALL TABLES;
Enter the replication slot details in Sequin
Back in the Sequin Console, enter the name of the replication slot (e.g. sequin_slot
) and publication (e.g. sequin_pub
) you just created. Then, name your database and click Create Database.
Create a consumer
With your RDS database connected to Sequin via a replication slot and publication, Sequin is now detecting changes to your tables. Now create a consumer to process your data changes and send them to your application.
Click the Add a consumer button and select your RDS database as the source. Follow the instructions in our quickstart guide to complete the process.
Next steps
With your RDS database connected to Sequin, you can now:
- Set up filters to capture specific changes.
- Use Sequin’s observability features to monitor and debug your data flows.
- Explore Sequin’s replay and backfill features for historical data processing.
For more information on these features, learn how Sequin works.
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