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 the transfer.
3. Activate the transfer.

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

Getting startedGetting started

Prepare 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 prepared file to the Object Storage bucket.

Set up the transferSet up the transfer

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

   • Database type: Object Storage.

   • Bucket: Bucket name in Object Storage.

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

   • Secret Access Key: Private part of the service account static 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

   Leave the default values for other properties.

2. Create a target endpoint and a transfer:

   Manually

   Terraform

   1. Create a target 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: 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 created endpoints.

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

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

   2. Check that 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.

Activate the transferActivate the transfer

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

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

3. Run the following query:

   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.

• Delete the other resources depending on how they were created:

  Manually

  Terraform

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

  1. Delete all objects from the bucket.

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

  3. Delete the objstorage-to-postgres.tf configuration file.

  4. Check that 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.

  5. Confirm updating the resources.

     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.

     All the resources described in the objstorage-to-postgres.tf configuration file will be deleted.