Transferring data from Yandex Object Storage using Yandex Data Transfer

You can migrate data from Yandex Object Storage to the Managed Service for PostgreSQL table using Data Transfer. To do this:

1. Prepare the test data.
2. Set up your transfer.
3. Activate the transfer.

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

Required paid resourcesRequired paid resources

The support cost for this solution includes:

• Fee for an Object Storage bucket: data storage and data operations (see Object Storage pricing).
• Managed Service for PostgreSQL cluster fee: use of computing resources allocated to hosts and disk space (see Managed Service for PostgreSQL pricing).
• Fee for public IP address assignment on cluster hosts (see Virtual Private Cloud pricing).
• Per-transfer fee: use of computing resources and number of transferred data rows (see Data Transfer pricing).

Getting startedGetting started

Set up the infrastructure:

Prepare the test dataPrepare the test data

1. Create demo_data.csv on the running instance and fill it with test data:

   1,Anna
   2,Robert
   3,Umar
   4,Algul
   5,Viktor
   

2. Upload the file you prepared to the Object Storage bucket.

Set up your transferSet up your transfer

1. Create a source endpoint of the Object Storage type with these settings:

   • Database type: Object Storage.

   • Bucket: Object Storage bucket name.

   • Access Key ID: Public component of the service account’s static key. If you created your infrastructure using Terraform, copy the key value from the Yandex Lockbox secret.

   • Secret Access Key: Service account’s secret access key. If you created your infrastructure using Terraform, copy the key value from the Yandex Lockbox secret.

   • Endpoint: https://storage.yandexcloud.net.

   • Region: ru-central1.

   • Data format: CSV.

   • Delimiter: Comma (,).

   • Table: Name of the CSV file in the bucket, e.g., demo_data.csv.

   • Result table schema: Select Manual and specify field names and data types:

     • Id: Int64
     • Name: UTF8

   Keep the default values for all other settings.

2. Create a target endpoint and set up the transfer:

   Manually

   Terraform

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

      • Installation type: Managed Service for PostgreSQL cluster.
      • Managed Service for PostgreSQL cluster: Name of the PostgreSQL source cluster 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 new endpoints.

   1. In the objstorage-to-postgres.tf file, specify the following variables:

      • source_endpoint_id: ID of the source endpoint.
      • transfer_enabled: Set to 1 to create a transfer.

   2. Make sure the Terraform configuration files are correct 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.

Activate the transferActivate the transfer

1. Activate the transfer and wait until its status switches to Completed.

2. Connect to the Managed Service for PostgreSQL target cluster database.

3. Run this request:

   SELECT * FROM public."demo_data.csv";
   

   Response example

    __file_name  | __row_index | Id |  Name  
   --------------+-------------+----+--------
   demo_data.csv |           1 |  1 | Anna
   demo_data.csv |           2 |  2 | Robert
   demo_data.csv |           3 |  3 | Umar
   demo_data.csv |           4 |  4 | Algul
   demo_data.csv |           5 |  5 | Viktor
   

Data successfully migrated.

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:

• Transfer.

• Source endpoint.

• Bucket objects.

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

  Manually

  Terraform

  • Target endpoint.
  • Managed Service for PostgreSQL.
  • Object Storage bucket.

  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.