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In this article:

  • Required paid resources
  • Getting started
  • Prepare the test data
  • Prepare and activate your transfer
  • Test the transfer
  • Delete the resources you created
  1. Building a data platform
  2. Migrating data from Managed Service for OpenSearch to Managed Service for YDB using Data Transfer

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

Written by
Yandex Cloud
Updated at May 5, 2025
  • Required paid resources
  • Getting started
  • Prepare the test data
  • Prepare and activate your transfer
  • Test the transfer
  • Delete the resources you created

With Data Transfer, you can transfer data from a Managed Service for OpenSearch cluster to a Managed Service for YDB DB.

To transfer data:

  1. Prepare the test data.
  2. Prepare and activate your transfer.
  3. Test the transfer.

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

Required paid resourcesRequired paid resources

The support cost includes:

  • Managed Service for OpenSearch cluster fee: Using computing resources allocated to hosts (including hosts with the MANAGER role) and disk space (see Managed Service for OpenSearch pricing).

  • Per-transfer fee: Using computing resources and the number of transferred data rows (see Data Transfer pricing).

  • Fee for using public IP addresses for cluster hosts (see Virtual Private Cloud pricing).

  • Fee for the Managed Service for YDB database. The charge depends on the usage mode:

    • For the serverless mode, you pay for data operations and the amount of stored data.
    • For dedicated instance mode, you pay for the use of computing resources, dedicated DBs, and disk space.

    Learn more about the Managed Service for YDB pricing plans.

Getting startedGetting started

Set up your infrastructure:

Manually
Using Terraform
  1. Create a Managed Service for OpenSearch cluster in any suitable configuration with publicly available hosts.

  2. If using security groups in your cluster, make sure they are configured correctly and allow connecting to the Managed Service for OpenSearch cluster.

  3. Get an SSL certificate to connect to the Managed Service for OpenSearch cluster.

  4. Create a Managed Service for YDB database named ydb1 in any suitable configuration.

  5. Create a service account named ydb-account with the ydb.editor role. The transfer will use it to access the database.

  1. If you do not have Terraform yet, install it.

  2. Get the authentication credentials. You can add them to environment variables or specify them later in the provider configuration file.

  3. Configure and initialize a provider. There is no need to create a provider configuration file manually, you can download it.

  4. Place the configuration file in a separate working directory and specify the parameter values. If you did not add the authentication credentials to environment variables, specify them in the configuration file.

  5. Download the opensearch-to-ydb.tf configuration file to the same working directory.

    This file describes:

    • Network.
    • Subnet.
    • Security group and rules required to connect to the Managed Service for OpenSearch cluster from the internet.
    • Database: Managed Service for YDB.
    • Managed Service for OpenSearch target cluster.
    • Target endpoint.
    • Transfer.
  6. In the opensearch-to-ydb.tf file, specify the following settings:

    • mos_version: OpenSearch version.
    • mos_password: User password of the OpenSearch database owner.
    • profile_name: Your YC CLI profile name.
  7. Make sure the Terraform configuration files are correct using this command:

    terraform validate
    

    If there are any errors in the configuration files, Terraform will point them out.

  8. 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.

    All the required resources will be created in the specified folder. You can check resource availability and their settings in the management console.

Prepare the test dataPrepare the test data

  1. Connect to the Managed Service for OpenSearch source cluster.

  2. Create a test index named people and set its schema:

    curl --user admin:<password> \
         --cacert ~/.opensearch/root.crt \
         --header 'Content-Type: application/json' \
         --request PUT 'https://<address_of_OpenSearch_host_with_DATA_role>:9200/people' && \
    curl --user admin:<password> \
         --cacert ~/.opensearch/root.crt \
         --header 'Content-Type: application/json' \
         --request PUT 'https://<address_of_OpenSearch_host_with_DATA_role>:9200/people/_mapping?pretty' \
         --data'
         {
               "properties": {
                  "name": {"type": "text"},
                  "age": {"type": "integer"}
               }
         }
         '
    
  3. Populate the test index with data:

    curl --user admin:<password> \
         --cacert ~/.opensearch/root.crt \
         --header 'Content-Type: application/json' \
         --request POST 'https://<address_of_OpenSearch_host_with_DATA_role>:9200/people/_doc/?pretty' \
         --data'
         {
               "name" : "Alice",
               "age" : "30"
         }
         ' && \
    curl --user admin:<password> \
         --cacert ~/.opensearch/root.crt \
         --header 'Content-Type: application/json' \
         --request POST 'https://<address_of_OpenSearch_host_with_DATA_role>:9200/people/_doc/?pretty' \
         --data'
         {
               "name" : "Robert",
               "age" : "32"
         }
         '
    
  4. Optionally, check the data in the test index:

    curl --user admin:<password> \
         --cacert ~/.opensearch/root.crt \
         --header 'Content-Type: application/json' \
         --request GET 'https://<address_of_OpenSearch_host_with_DATA_role>:9200/people/_search?pretty'
    

Prepare and activate your transferPrepare and activate your transfer

  1. Create a source endpoint of the OpenSearch type with the following settings:

    • Connection type: Managed Service for OpenSearch cluster.
    • Managed Service for OpenSearch cluster: Select a Managed Service for OpenSearch cluster from the list.
    • User: admin.
    • Password: <user_password>.
  2. Create a target endpoint and transfer:

    Manually
    Using Terraform
    1. Create a target endpoint of the YDB type with the following settings:

      • Database: Select the ydb1 database from the list.
      • Service account ID: Select the ydb-account service account from the list.
    2. Create a transfer of the Snapshot type that will use the created endpoints.

    3. Activate the transfer and wait for its status to change to Completed.

    1. In the opensearch-to-ydb.tf file, specify the following settings:

      • source_endpoint_id: Source endpoint ID.
      • transfer_enabled: Set to 1 for creating a target endpoint and transfer.
    2. Make sure the Terraform configuration files are correct using this command:

      terraform validate
      

      If there are any errors in the configuration files, Terraform will point them out.

    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.

    4. The transfer will be activated automatically. Wait for its status to change to Completed.

Test the transferTest the transfer

  1. Connect to the Managed Service for YDB database.

  2. Run this request:

    SELECT * FROM people;
    
    Response example
    # |          _id           | age | name
    --+------------------------+-----+---------
    0 | "5wn5BJEBRVOYnL8d13sP" | 30  | "Alice"
    1 | "6An5BJEBRVOYnL8d13uy" | 32  | "Robert"
    

Delete the resources you createdDelete the resources you created

Note

Before deleting the resources you created, deactivate the transfer.

Some resources are not free of charge. To avoid paying for them, delete the resources you no longer need:

  1. Delete the resources depending on how you created them:

    Manually
    Using Terraform
    1. Delete the transfer.
    2. Delete the target endpoint.
    3. Delete the Managed Service for OpenSearch cluster.
    4. Delete the Managed Service for YDB database.
    5. Delete the service account.
    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.

  2. Delete the source endpoint.

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