Migrating data from Yandex Object Storage to Yandex Managed Service for PostgreSQL using Yandex Data Transfer

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Updated at November 7, 2024

Getting started
Prepare the test data
Set up the transfer
Activate the transfer
Delete the resources you created

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

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

Getting started

Prepare the infrastructure:

Manually

Terraform

Create a Managed Service for PostgreSQL target cluster in any suitable configuration with the following settings:
- Public access to cluster hosts: Allowed.
- DB name: db1
- Username: pg-user
- Password: <user_password>
If using security groups in your cluster, make sure they are configured correctly and allow connecting to the cluster.
Create an Yandex Object Storage bucket.
Create a service account named storage-viewer with the storage.viewer role. The transfer will use it to access the bucket.
Create a static access key for the storage-viewer service account.

If you do not have Terraform yet, install it.
Get the authentication credentials. You can add them to environment variables or specify them later in the provider configuration file.
Configure and initialize a provider. There is no need to create a provider configuration file manually, you can download it.
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.
Download the objstorage-to-postgres.tf configuration file to the same working directory.

This file describes:
- Network.
- Subnet.
- Security group required to connect to a cluster.
- Service account to be used to create and access the bucket.
- Yandex Lockbox secret which will store the static key of the service account to configure the source endpoint.
- Object Storage source bucket.
- Managed Service for PostgreSQL target cluster.
- Target endpoint.
- Transfer.
Specify the following in the objstorage-to-postgres.tf file:
- folder_id: Cloud folder ID, same as in the provider settings.
- bucket_name: Bucket name consistent with the naming conventions.
- pg_password: PostgreSQL user password.
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.
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.
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 data

Create demo_data.csv on the running instance and fill it with test data:
```
1,Anna
2,Robert
3,Umar
4,Algul
5,Viktor
```
Upload the prepared file to the Object Storage bucket.

Set up the transfer

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.
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. 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:
    
    Run the command:
    
    terraform apply
    
    Confirm the update of resources.
    
    Wait for the operation to complete.

Activate the transfer

Activate the transfer and wait for its status to change to Completed.
Connect to the Managed Service for PostgreSQL target cluster database.

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 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
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. 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.
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:
    
    Run the command:
    
    terraform apply
    
    Confirm the update of resources.
    
    Wait for the operation to complete.
  All the resources described in the objstorage-to-postgres.tf configuration file will be deleted.

Migrating data from Yandex Object Storage to Yandex Managed Service for PostgreSQL using Yandex Data Transfer

Getting startedGetting started

Prepare the test dataPrepare the test data

Set up the transferSet up the transfer

Activate the transferActivate the transfer

Delete the resources you createdDelete the resources you created

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Getting started

Prepare the test data

Set up the transfer

Activate the transfer

Delete the resources you created