Configuring a Health Check

Scenario

You can configure health check to detect unhealthy endpoints and ensure service reliability and availability.

Constraints

• Before configuring a health check, ensure that the security group rules configured for the endpoint allow access from the 122.9.234.0/23, 116.196.216.0/23, and 124.71.242.0/23 over the health check port.
• For UDP listeners, ensure that the security group rules configured for the endpoint allow the UDP traffic over the health check port and the ICMP traffic destined for the endpoint.

Procedure

1. Log in to the management console.
2. Click in the upper left corner and choose Networking > Global Accelerator.

   The Global Accelerator page is displayed.

3. Search for the global accelerator by name or ID.
4. Click the name of the global accelerator to go to the details page.
5. Click Endpoint Groups.
6. Click the name of the endpoint group.
7. In the basic information area, click Configure next to Health Check.
8. Specify the parameters listed in Table 1.

   Table 1 Parameters required for configuring health check

   Parameter	Description
   Health Check	Whether to enable health check. If you disable health check, requests may be forwarded to unhealthy endpoints.
   Protocol	The health check protocol can be TCP. Default value: TCP.
   Port	The port used for health check. The port No. ranges from 1 to 65535.
   Advanced Settings
   Interval (s)	The maximum time between two consecutive health checks, in seconds. The interval ranges from 1 to 60.
   Timeout (s)	The maximum time required for waiting for a response to a health check request, in seconds. The timeout ranges from 1 to 60.
   Maximum Retries	The maximum number of health check retries allowed. The value ranges from 1 to 10.

9. Click OK.