Add on-premises servers to a primary/secondary server group

Overview

This topic describes how to create a primary/secondary server group and then add on-premises servers to the primary/secondary server group. A primary/secondary server group contains a primary server and a secondary server that can fail over to prevent service interruption. By default, the primary server receives all requests that are distributed by a Server Load Balancer (SLB) instance. When the primary server fails, requests are redirected to the secondary server.

Prerequisites

Applications are deployed on the on-premises servers, and the servers are ready to receive requests.

Procedure

1. On the Instances page, click the instance.
2. On the Instances Management page, click the Primary/Secondary Server Groups tab.
   
3. On the Primary/Secondary Server Groups section, click the Create Primary/Secondary Server Group button.
   
4. On the Create Primary/Secondary Server Group section, configure the primary/secondary server group name.
   
5. On the Create Primary/Secondary Server Group section, click the Add On-premises Server button.
6. On the Select Servers section, click the Add button.
   Note: You can add only two on-premises servers to a primary/secondary server group.
   
7. On the Select Servers section, click the Add button.
   
8. On the Select Servers section, select a virtual private cloud (VPC) from the VPC Connected to IDC drop-down list.
9. On the Select Servers section, enter a name for the on-premises server that you want to add.
10. On the Select Servers section, specify the IP address of the server. Note: The on-premises server must use the specified IP address to communicate with the VPC.
    
11. On the Select Servers section, click the Next button.
12. On the Configure Ports and Weights section, configure the backend port opened on each on-premises server to receive requests.
13. On the Configure Ports and Weights section, click the Add button. Note: You can set multiple ports for an on-premises server.
    
14. On the Create Primary/Secondary Server Group section, click the Create button.
    
15. On the pop-up message, click the OK button.