Migrating a database from Yandex Managed Service for MySQL® to Object Storage

With Data Transfer, you can transfer data from a Managed Service for MySQL® source cluster to Yandex Object Storage object storage.

To transfer data:

1. Prepare the source cluster.
2. Set up and activate the transfer.
3. Test your transfer.

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

Required paid resourcesRequired paid resources

• Managed Service for MySQL® cluster: computing resources allocated to hosts, size of storage and backups (see Managed Service for MySQL® pricing).
• Public IP addresses if public access is enabled for cluster hosts (see Virtual Private Cloud pricing).
• Object Storage bucket: use of storage, data operations (see Object Storage pricing).
• Each transfer: use of computing resources and number of transferred data rows (see Data Transfer pricing).

Getting startedGetting started

Set up the infrastructure:

Prepare the source clusterPrepare the source cluster

1. If you created the infrastructure manually, you must now prepare your source cluster.

2. Connect to the Managed Service for MySQL® source cluster.

3. Add test data to the database. As an example, we'll use a table with information transmitted by car sensors.

   Create a table:

   CREATE TABLE measurements (
       device_id varchar(200) NOT NULL,
       datetime timestamp NOT NULL,
       latitude real NOT NULL,
       longitude real NOT NULL,
       altitude real NOT NULL,
       speed real NOT NULL,
       battery_voltage real,
       cabin_temperature real NOT NULL,
       fuel_level real,
       PRIMARY KEY (device_id)
   );
   

   Populate the table with data:

   INSERT INTO measurements VALUES
       ('iv9a94th6rzt********', '2022-06-05 17:27:00', 55.70329032, 37.65472196,  427.5,    0, 23.5, 17, NULL),
       ('rhibbh3y08qm********', '2022-06-06 09:49:54', 55.71294467, 37.66542005, 429.13, 55.5, NULL, 18, 32);
   

Set up and activate the transferSet up and activate the transfer

1. Create a target endpoint:

   • Database type: Object Storage.

   • Endpoint settings:

     • Connection settings:

       • Bucket: Enter the name of the Object Storage bucket.

       • Service account: Select or create a new service account with the storage.uploader role.

     • Folder name: measurements.

2. Create a source endpoint and transfer:

   Manually

   Terraform

   1. Create a source endpoint:

      • Database type: MySQL.

      • Endpoint parameters:

        • Connection settings:

          • Connection type: Managed Service for MySQL cluster.

            Select your source cluster from the list and specify its connection settings.

        • (Optional) Included tables, Excluded tables: Specify regular expressions for tables both subject and not subject to transfer.

   2. Create a transfer of the Snapshot type that will use the new endpoints.

   3. Activate the transfer.

   1. In the data-transfer-mmy-objs.tf file, specify these variables:

      • target_endpoint_id: ID of the target endpoint.
      • transfer_enabled: Set to 1 to create a transfer.
      • (Optional) include_tables_regex, exclude_tables_regex: Regular expressions for tables both subject and not subject to transfer.

   2. Make sure the Terraform configuration files are correct using this command:

      terraform validate
      

      Terraform will show any errors found in your configuration 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.

      The transfer will activate automatically upon creation.

Test your transferTest your transfer

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

2. Make sure the data has been moved from the Managed Service for MySQL® source cluster to the Object Storage bucket:

   1. In the management console, select the folder containing your bucket.
   2. In the list of services, select Object Storage.
   3. Select the bucket from the list.
   4. Navigate to the Objects tab.
   5. Make sure that the Object Storage bucket contains the measurements directory with the <source_cluster_database_name>_measurements object with test data.

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 the target endpoint.

Delete the other resources depending on how you created them: