Migrating data from Yandex Managed Service for MySQL® to Yandex Managed Service for Greenplum® using Yandex Data Transfer
You can set up data transfer from Managed Service for MySQL® to Managed Service for Greenplum® databases using Data Transfer. To do this:
- Prepare the test data.
- Create a database in the target cluster.
- Prepare and activate the transfer.
- Test the transfer.
If you no longer need the resources you created, delete them.
Getting started
Prepare the infrastructure:
-
Create a Managed Service for MySQL® source cluster in any availability zone with publicly available hosts in any suitable configuration and the following settings:
- DB name:
mmy_db
- Username:
mmy_user
- Password:
<source_password>
- DB name:
-
Grant
mmy_user
theREPLICATION CLIENT
andREPLICATION SLAVE
administrative privileges.For more information about administrative privileges, see the settings description.
-
In the same availability zone, create a Managed Service for Greenplum® target cluster in any suitable configuration with publicly available hosts and the following settings:
- Username:
mgp_user
- Password:
<target_password>
- Access from Data Transfer: Enabled
- Username:
-
Make sure that the cluster security groups are set up correctly and allow connecting to them:
-
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 mmy-to-mgp.tf
configuration file to the same working directory.This file describes:
- Networks and subnets for hosting the clusters.
- Security groups for making cluster connections.
- Managed Service for MySQL® source cluster.
- Managed Service for Greenplum® target cluster.
- Source endpoint.
- Transfer.
-
In the
mmy-to-mgp.tf
file, specify:- MySQL® and Greenplum® versions
- MySQL® and Greenplum® user passwords
-
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:
-
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:
-
Run the command:
terraform apply
-
Confirm the update of resources.
-
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
-
Connect to the
mmy_db
database in the Managed Service for MySQL® source cluster. -
Create a simple table named
x_tab
:CREATE TABLE table1 ( id int NOT NULL, name varchar (10), PRIMARY KEY (id) )
-
Populate the table with data:
INSERT INTO table1 VALUES (1, 'Name1'), (2, 'Name2'), (3, 'Name3')
Create a database in the target cluster
-
Connect to the auxiliary
postgres
database of the Managed Service for Greenplum® target cluster asmgp_user
. -
Create a database named
mgp_db
:CREATE DATABASE mgp_db;
Prepare and activate the transfer
-
Create a target endpoint of the
Greenplum®
type and specify the cluster connection parameters in it:- Connection type:
Managed Service for Greenplum cluster
. - Managed Service for Greenplum cluster:
<name_of_Greenplum®_target_cluster>
from the drop-down list. - Database:
mgp_db
. - User:
mgp_user
. - Password:
<user_password>
.
- Connection type:
-
Create a source endpoint and a transfer.
ManuallyUsing Terraform-
Create a source endpoint of the
MySQL®
type and specify the cluster connection parameters in it:- Connection type:
Managed Service for MySQL cluster
. - Managed Service for MySQL cluster:
<name_of_MySQL®_source_cluster>
from the drop-down list. - Database:
mmy_db
. - User:
mmy_user
. - Password:
<user_password>
.
- Connection type:
-
Create a transfer of the Snapshot and replication type that will use the created endpoints.
-
Activate the transfer and wait for its status to change to Replicating.
-
In the
mmy-to-mgp.tf
file, specify the values for these parameters:target_endpoint_id
: ID of the target endpoint.transfer_enabled
: Set to1
to enable transfer creation.
-
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:
-
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:
-
Run the command:
terraform apply
-
Confirm the update of resources.
-
Wait for the operation to complete.
-
-
-
The transfer will be activated automatically. Wait for its status to change to Replicating.
-
Test the transfer
Check the transfer performance by testing the copy and replication processes.
Test the copy process
-
Connect to the
mgp_db
database in the Managed Service for Greenplum® target cluster. -
Run the following query:
SELECT * FROM mmy_db.table1;
Test the replication process
-
Connect to the Managed Service for MySQL® source cluster database.
-
Add data to
table1
:INSERT INTO table1 VALUES (4, 'Name4');
-
Make sure the new row has been added to the target database:
-
Connect to the Managed Service for Greenplum® target cluster database.
-
Run the following query:
SELECT * FROM mmy_db.table1;
-
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:
If you created your resources using Terraform:
-
In the terminal window, go to the directory containing the infrastructure plan.
-
Delete the
mmy-to-mgp.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.
-
Confirm updating the resources.
-
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:
-
Run the command:
terraform apply
-
Confirm the update of resources.
-
Wait for the operation to complete.
-
All the resources described in the
mmy-to-mgp.tf
configuration file will be deleted. -