Migrating data from Yandex Managed Service for PostgreSQL to Yandex Managed Service for OpenSearch using Yandex Data Transfer

You can migrate a database from Yandex Managed Service for PostgreSQL to Yandex Managed Service for OpenSearch using Yandex Data Transfer. Proceed as follows:

1. Set up the transfer.
2. Test your transfer.

If you no longer need the resources you created, delete them.

Required paid resourcesRequired paid resources

• Managed Service for PostgreSQL cluster: Computing resources allocated to hosts, storage and backup size (see Managed Service for PostgreSQL pricing).
• Managed Service for OpenSearch cluster: Use of computing resources and storage size (see Managed Service for OpenSearch pricing).
• Public IP addresses if public access is enabled for cluster hosts (see Virtual Private Cloud pricing).

Getting startedGetting started

Set up the infrastructure:

Set up your transferSet up your transfer

1. Connect to the Managed Service for PostgreSQL cluster. In the db1 database, create a table named x_tab and populate it with data:

   CREATE TABLE x_tab
   (
       id NUMERIC PRIMARY KEY,
       name CHAR(5)
   );
   INSERT INTO x_tab (id, name) VALUES
     (40, 'User1'),
     (41, 'User2'),
     (42, 'User3'),
     (43, 'User4'),
     (44, 'User5');
   

2. Create a target endpoint with the following parameters:

   • Connection type: Managed Service for OpenSearch cluster.
   • Managed Service for OpenSearch cluster: Select the Managed Service for OpenSearch cluster from the list.
   • User: admin.
   • Password: <user_password>.

3. Create a source endpoint and transfer:

   Manually

   Terraform

   1. Create a source endpoint of the PostgreSQL type and specify the cluster connection parameters in it:

      • Installation type: Managed Service for PostgreSQL cluster.
      • Managed Service for PostgreSQL cluster: <PostgreSQL_source_cluster_name> from the drop-down list.
      • Database: db1.
      • User: pg-user.
      • Password: <user_password>.

   2. Create a Snapshot-type transfer configured to use the new endpoints.

   3. Activate the transfer.

   1. In the postgresql-to-opensearch.tf file, specify the values of the following variables:

      • target_endpoint_id: Target endpoint ID.
      • transfer_enabled: 1 to create a transfer.

   2. Validate your Terraform configuration files using this command:

      terraform validate
      

      Terraform will display any configuration errors detected in your files.

   3. Create the required infrastructure:

      1. Run this command to view the planned changes:

         terraform plan
         

         If you described the configuration correctly, the terminal will display a list of the resources to update and their parameters. This is a verification step that does not apply changes to your resources.

      2. If everything looks correct, apply the changes:

         1. Run this command:

            terraform apply
            

         2. Confirm updating the resources.

         3. Wait for the operation to complete.

      The transfer will activate automatically upon creation.

Test your transferTest your transfer

1. Wait for the transfer status to change to Completed.

2. Connect to the target cluster using OpenSearch Dashboards.

3. Select the Global tenant.

4. Create a new index template named public.x_tab:

   1. Open the control panel by clicking .
   2. Under Management, select Stack Management.
   3. Go to the Index Patterns section and click Create index pattern.
   4. In the Index pattern name field, specify public.x_tab and click Next step.
   5. Click Create index pattern.

5. Open the management panel by clicking .

6. Under OpenSearch Dashboards, select Discover.

7. The dashboard that opens should contain data from the Managed Service for PostgreSQL database.

Delete the resources you createdDelete the resources you created

To reduce the consumption of resources you do not need, delete them:

1. Delete the target endpoint.

2. Delete other resources using the same method used for their creation:

   Manually

   Terraform

   1. Delete the Managed Service for OpenSearch cluster.
   2. Delete the Managed Service for PostgreSQL cluster.
   3. Delete the source endpoint.
   4. Delete the transfer.

   1. In the terminal window, go to the directory containing the infrastructure plan.

      Warning

      Make sure the directory has no Terraform manifests with the resources you want to keep. Terraform deletes all resources that were created using the manifests in the current directory.

   2. Delete resources:

      1. Run this command:

         terraform destroy
         

      2. Confirm deleting the resources and wait for the operation to complete.

      All the resources described in the Terraform manifests will be deleted.