Migrating data from MySQL® to YDB
With Data Transfer, you can transfer data from a Managed Service for MySQL® source cluster to Managed Service for YDB.
To transfer data:
If you no longer need the resources you created, delete them.
Prepare the infrastructure
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Create a Managed Service for MySQL® source cluster with any suitable configuration.
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Create a Managed Service for YDB database in any suitable configuration.
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If using security groups, configure them to be able to connect to the cluster from the internet.
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If you do not have Terraform yet, install it.
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Get the authentication credentials. You can add them to environment variables or specify them later in the provider configuration file.
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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.
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Download the data-transfer-mmy-ydb.tf
configuration file to the same working directory.This file describes:
- Network.
- Subnet.
- Security group and the rule required to connect to a Managed Service for MySQL® cluster.
- Managed Service for MySQL® source cluster.
- Managed Service for YDB database.
- Source endpoint.
- Transfer.
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Specify in the
data-transfer-mmy-ydb.tf
file:-
The Managed Service for MySQL® source cluster parameters that will also be used as the source endpoint parameters:
source_mysql_version
: MySQL® version.source_db_name
: Database name.source_user
andsource_password
: Database owner username and password.
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target_db_name
: Managed Service for YDB database name.
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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.
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Create the required infrastructure:
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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.
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If you are happy with the planned changes, apply them:
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Run the command:
terraform apply
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Confirm the update of resources.
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Wait for the operation to complete.
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All the required resources will be created in the specified folder. You can check resource availability and their settings in the management console
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Prepare the source cluster
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If you created the infrastructure manually, prepare the source cluster.
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Add test data to the database. As an example, we will use a simple 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 transfer
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Database type:
YDB
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Endpoint parameters:
- Connection settings → Database: Select the Managed Service for YDB database from the list.
- Service account ID: Select or create a service account with the
ydb.editor
role.
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Create a source endpoint and transfer:
ManuallyTerraform-
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Database type:
MySQL®
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Endpoint parameters → Connection settings:
Managed Service for MySQL cluster
.Select a source cluster from the list and specify its connection settings.
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Create a transfer of the Snapshot and replication type that will use the created endpoints.
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Activate your transfer.
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Uncomment the following in the
data-transfer-mmy-ydb.tf
file:- The
target_endpoint_id
variable and set it to the value of the endpoint ID for the target created in the previous step. - The
yandex_datatransfer_endpoint
andyandex_datatransfer_transfer
resources.
- The
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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:
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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.
-
If you are happy with the planned changes, apply them:
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Run the command:
terraform apply
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Confirm the update of resources.
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Wait for the operation to complete.
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Once created, your transfer will be activated automatically.
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Test the transfer
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Wait for the transfer status to change to Replicating.
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Make sure the data from the source Managed Service for MySQL® cluster has been moved to the Managed Service for YDB database:
Management consoleCLI- In the management console
, select the folder with the DB you need. - In the list of services, select Managed Service for YDB.
- Select the database from the list.
- Go to the Navigation tab.
- Check that the Managed Service for YDB database contains the
<source_cluster_DB_name>_measurements
table with the test data.
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Check that the database contains the
<source_cluster_DB_name>_measurements
table with the test data:SELECT * FROM <source_cluster_DB_name>_measurements;
- In the management console
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Connect to the Managed Service for MySQL® source cluster and add data to the
measurements
table:INSERT INTO measurements VALUES ('iv7b74th678t********', '2020-06-08 17:45:00', 53.70987913, 36.62549834, 378.0, 20.5, 5.3, 20, NULL);
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Check that the Managed Service for YDB database shows information about the added row:
Management consoleCLI- In the management console
, select the folder with the DB you need. - In the list of services, select Managed Service for YDB.
- Select the database from the list.
- Go to the Navigation tab.
- Check that new data has been added to the
<source_cluster_DB_name>_measurements
table.
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Check that new data has been added to the
<source_cluster_DB_name>_measurements
table:SELECT * FROM <source_cluster_DB_name>_measurements;
- In the management console
Delete the resources you created
Note
Before deleting the created resources, deactivate the transfer.
Some resources are not free of charge. To avoid paying for them, delete the resources you no longer need:
- Delete the transfer.
- Delete the target endpoint.
- If you created a service account together with the target endpoint, delete it.
Delete the other resources depending on how they were created:
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In the terminal window, go to the directory containing the infrastructure plan.
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Delete the
data-transfer-mmy-ydb.tf
configuration file. -
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.
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Confirm updating the resources.
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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.
-
If you are happy with the planned changes, apply them:
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Run the command:
terraform apply
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Confirm the update of resources.
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Wait for the operation to complete.
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All the resources described in the
data-transfer-mmy-ydb.tf
configuration file will be deleted. -