Migrating databases from Yandex Managed Service for MySQL® to Yandex 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. 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 infrastructure:

Prepare the source clusterPrepare the source cluster

1. If you created the infrastructure manually, prepare the 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);
   

Prepare and activate the transferPrepare 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 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 a source cluster from the list and specify its connection settings.

        • (Optional) Included tables, Excluded tables: Regular expressions for the tables to include in and exclude from the transfer.

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

   3. Activate your transfer.

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

      • target_endpoint_id: ID of the target endpoint.
      • transfer_enabled: Set to 1 to enable transfer creation.
      • (Optional) include_tables_regex, exclude_tables_regex: Regular expressions for the tables to be transferred and those not to be transferred.

   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.

      Once created, your transfer will be activated automatically.

Test the transferTest the 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 where the bucket is located.
   2. In the list of services, select Object Storage.
   3. Select the bucket from the list.
   4. Go to the Objects tab.
   5. Check that the Object Storage bucket contains the measurements folder with the <source_cluster_database_name>_measurements object with the 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 they were created: