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. Follow these steps:

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

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

Getting startedGetting started

Sign up for Yandex Cloud and create a billing account:

1. Navigate to the management console and log in to Yandex Cloud or create a new account.
2. On the Yandex Cloud Billing page, make sure you have a billing account linked and it has the ACTIVE or TRIAL_ACTIVE status. If you do not have a billing account, create one and link a cloud to it.

If you have an active billing account, you can create or select a folder for your infrastructure on the cloud page.

Learn more about clouds and folders here.

Required paid resourcesRequired paid resources

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

Set up your infrastructureSet up your infrastructure

Set up the transferSet up the 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 settings:

   • Connection type: Managed Service for OpenSearch cluster.
   • Managed Service for OpenSearch cluster: Select your 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 PostgreSQL-type source endpoint with the following cluster connection settings:

      • 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 transfer of the Snapshot-type that will use the endpoints you created.

   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: Set to 1 to create the 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 be activated automatically upon creation.

Test the transferTest the transfer

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

2. Connect to the target cluster via OpenSearch Dashboards.

3. Select the Global tenant.

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

   1. Open the management panel by clicking .
   2. Under Management, select Stack Management.
   3. Navigate to the Index Patterns section and click Create index pattern.
   4. Specify public.x_tab in the Index pattern name field 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 minimize resource consumption, delete the resources you no longer need:

1. Delete the target endpoint.

2. Delete the other resources depending on how you created them:

   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.