- What's New
- Function Overview
- Service Overview
- Billing
- Getting Started
- User Guide
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Best Practices
- Using Global Accelerator to Speed Up Cross-Border Access to Web Servers
- Using CDN and Global Accelerator to Speed Up Cross-Border Access
- Using Global Accelerator to Speed Up Cross-Border Access to Third-Party On-premises Servers
- Using Global Accelerator to Accelerate Communications Between Cloud and On-Premises Servers and Implement Multi-active DR
- Transferring the Source IP Address of a Client
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API Reference
- Before You Start
- API Overview
- Calling APIs
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API
- Global Accelerator
- Listener
- Endpoint Group
- Endpoint
- Health Check
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IP Address Group
- Creating an IP Address Group
- Querying IP Address Groups
- Querying Details of an IP Address Group
- Updating an IP Address Group
- Deleting an IP Address Group
- Adding CIDR Blocks to an IP Address Group
- Removing CIDR Blocks from an IP Address Group
- Associating an IP Address Group with a Listener
- Disassociating an IP Address Group from a Listener
- Region
- Tag
- Log
- Permissions Policies and Supported Actions
- Appendix
- SDK Reference
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FAQs
- Can I Use the Ping Command to Test Latency?
- How Will I Be Billed for Global Accelerator?
- How Can I Increase the Global Accelerator Quotas?
- How Can I Use Traffic Dial to Distribute Traffic?
- What Types of Endpoints Can Be Added to a Global Accelerator?
- Can I Use Global Accelerator in an Area That Is Not Listed Among the Acceleration Areas?
- What Are the Statuses and Health Check Results of Endpoints?
- What Should I Do If an Endpoint Is Unhealthy?
- Most Frequently Asked Questions
- Configuring the TOA Module
- How Can I Use Global Accelerator to Enable European Users to Access the Applications Deployed in or Outside the Chinese Mainland (Excluding Europe) Faster?
- General Reference
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Configuring a Health Check
Scenario
You can configure a health check to detect unhealthy endpoints and ensure service reliability and availability.
Constraints
- For UDP listeners, ensure that the security group rules configured for each endpoint allow ICMP traffic over the health check port.
- Ensure that the security group rules configured for each endpoint allow traffic from given CIDR blocks over the health check port.
For details, see Table 1.
Table 1 CIDR blocks that need to be allowed Endpoint Type
Endpoint Group Region
CIDR Blocks to Be Allowed
EIP
Custom EIP
N/A
122.9.234.0/23
116.196.216.0/23
124.71.242.0/23
ECS
ELB
IP address
Custom domain name
CN North-Beijing4
1.92.116.0/26
1.92.117.0/26
CN East-Shanghai1
60.204.194.192/27
60.204.195.192/27
CN South-Guangzhou
110.41.74.0/25
110.41.75.0/25
CN-Hong Kong
190.92.249.0/26
190.92.250.0/26
AP-Singapore
101.44.164.192/27
101.44.165.192/27
TR-Istanbul
101.44.42.0/27
101.44.43.0/27
Procedure
- Log in to the Global Accelerator console.
- Search for the global accelerator by name or ID.
- Click the name of the global accelerator to go to the details page.
- Click Endpoint Groups.
- Click the name of the endpoint group.
- In the basic information area, click Configure next to Health Check.
- Specify the parameters listed in Table 2.
Table 2 Parameters required for configuring a 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 number 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.
- Click OK.
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