This topic describes how to add a node to a primary ApsaraDB RDS for MySQL cluster. This operation does not affect the read and write operations of the instance. After the node is added, you can configure the weight of the cluster's read-only endpoint to distribute traffic to the new node and implement load balancing. A single ApsaraDB RDS for MySQL cluster supports a maximum of eight secondary nodes.
Prerequisites
The ApsaraDB RDS for MySQL primary instance must meet the following conditions:
Series: Cluster Edition
Instance status: Running
Billing rules
For more information about the billing rules after nodes are added, see Specification changes.
Procedure
Go to the Instances page. In the top navigation bar, select the region in which the RDS instance resides. Then, find the RDS instance and click the ID of the instance.
On the Basic Information page, in the Instance Topology Management section, click Add or Delete Node.
In the dialog box that appears, select Add Node and click Next.
In the Node configuration item, click the
icon or Add a Node, and then configure the zone, instance type, and vSwitch for the new node.
NoteTo cancel adding the new node, you can click the
icon to the left of the node.Read the terms of service and click Confirm Order.
The node is added when the instance status changes from Adding Node to Running.
Related operations
After you add the node, you can configure the weight of the cluster's read-only endpoint to distribute traffic to the new node for load balancing.
Add a node to a primary ApsaraDB RDS for MySQL cluster by calling the CreateDBNodes API operation.