Delivering data from an Data Streams queue to Managed Service for YDB using Yandex Data Transfer

With Data Transfer, you can deliver data from a stream in Data Streams to a Managed Service for YDB database.

To transfer data:

1. Prepare a Data Streams data stream.
2. Prepare and activate the transfer.
3. Test the transfer.

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

Getting startedGetting started

Prepare the data transfer infrastructure:

Create a Data Streams data streamCreate a Data Streams data stream

Create a Data Streams data stream.

Prepare and activate the transferPrepare and activate the transfer

1. Create an endpoint for the Data Streams source.

   • Database type: Yandex Data Streams.

   • Endpoint parameters:

     • Connection settings:

       • Database: Select the Managed Service for YDB database for the data stream in Data Streams from the list.
       • Stream: Specify the name of the Data Streams data stream.
       • Service account: Select or create a service account with the yds.editor role.

     • Advanced settings:

       • Conversion rules: JSON.

       • Data scheme: JSON specification.

         Fill in the data schema:

         Data schema

             [
                 {
                     "name": "device_id",
                     "type": "string"
                 },
                 {
                     "name": "datetime",
                     "type": "datetime"
                 },
                 {
                     "name": "latitude",
                     "type": "double"
                 },
                 {
                     "name": "longitude",
                     "type": "double"
                 },
                 {
                     "name": "altitude",
                     "type": "double"
                 },
                 {
                     "name": "speed",
                     "type": "double"
                 },
                 {
                     "name": "battery_voltage",
                     "type": "any"
                 },
                 {
                     "name": "cabin_temperature",
                     "type": "double"
                 },
                 {
                     "name": "fuel_level",
                     "type": "any"
                 }
             ]
         

2. Create a target endpoint:

   • Database type: YDB.

   • Endpoint parameters:

     • Connection settings:

       • Database: Select the Managed Service for YDB target database from the list.
       • Service account ID: Select or create a service account with the ydb.editor role.

3. Create a transfer:

   Manually

   Terraform

   1. Create a transfer of the Replication type that will use the created endpoints.
   2. Activate your transfer.

   1. In the yds-to-ydb.tf file, specify the values of the following variables:

      • source_endpoint_id: Source endpoint ID.
      • target_endpoint_id: Target endpoint ID.
      • transfer_enabled: 1 to create a 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 the command to view planned changes:

         terraform plan
         

         If the resource configuration descriptions are correct, the terminal will display a list of the resources to modify and their parameters. This is a test step. No resources are updated.

      2. If you are happy with the planned changes, apply them:

         1. Run the command:

            terraform apply
            

         2. Confirm the update of resources.

         3. Wait for the operation to complete.

      The transfer will be activated automatically.

Test the transferTest the transfer

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

2. Send test data to the data stream in Data Streams:

   {
       "device_id":"iv9a94th6rzt********",
       "datetime":"2020-06-05T17:27:00",
       "latitude":"55.70329032",
       "longitude":"37.65472196",
       "altitude":"427.5",
       "speed":"0",
       "battery_voltage":"23.5",
       "cabin_temperature":"17",
       "fuel_level":null
   }
   

3. Make sure the data has been moved to the target database:

   Management console

   YDB CLI

   1. In the management console, select the folder with the DB.
   2. In the list of services, select Managed Service for YDB.
   3. Select the database from the list.
   4. Go to the Navigation tab.
   5. Make sure the <stream_name> table now contains the test data.

   1. Connect to the Managed Service for YDB database.

   2. Make sure the <stream_name> table now contains the test data:

      ydb table query execute \
      --query "SELECT * \
      FROM <stream_name>"
      

Delete the resources you createdDelete the resources you created

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

1. Delete the transfer.
2. Delete endpoints for both the source and target.
3. If you had created service accounts, delete them.

Delete the other resources depending on how they were created: