Migrating databases from Yandex Managed Service for MySQL® to Yandex Object Storage

Data Transfer enables you to transfer data from a Managed Service for MySQL® source cluster to Yandex 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, which includes computing resources allocated to hosts, storage and backup size (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).

Getting startedGetting started

Set up your infrastructure:

Prepare the source clusterPrepare the source cluster

1. If you created the infrastructure manually, set up your source cluster.

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

3. Populate the database with test data. In this example, we will use a table containing information from 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: Specify the Object Storage bucket name.

       • Service account: Select an existing service account or create a new one 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.

        • Included tables, Excluded tables: Regular expressions for the tables you want to transfer and for those you want to ignore. These parameters are optional.

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

   3. Activate the transfer.

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

      • target_endpoint_id: Target endpoint ID.
      • transfer_enabled: 1 to create a transfer.
      • include_tables_regex, exclude_tables_regex: Regular expressions for the tables you want to transfer and for those you want to ignore. These variables are optional.

   2. Validate your Terraform configuration files 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.

      The transfer will be activated 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 transferred 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 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

To reduce the consumption of resources, delete those you do not need:

1. Delete the transfer.

2. Delete the target endpoint.

3. Delete the other resources depending on how you created them:

   Manually

   Terraform

   1. Delete the source endpoint.

   2. Delete the Object Storage bucket.

   3. Delete the Managed Service for MySQL® cluster.

   4. If you created a service account when creating the target endpoint, delete it.

   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.