You can upgrade your existing public network Cloud Load Balancer (CLB) instances to domain name-based CLB instances. After the upgrade, the CLB service will be delivered through domain names, and VIPs may change dynamically with business requests and will no longer be displayed in the console.
CLB Service Comparison Before and After the Upgrade
Item
After Upgrade
Before Upgrade
SLA
99.99%
99.95%
Domain names supported
Yes
No
Automatic VIP scaling supported
Yes
No
VIP changes
VIPs may change dynamically with business requests and will no longer be displayed in the console.
VIPs are fixed.
Health check source IP
100.64.0.0/10 IP range by default, helping prevent IP conflicts
CLB instance VIP by default, which can be switched to the 100.64.0.0/10 IP range
Restrictions
Classic networks do not support the upgrade of CLB instances. If your CLB instance is in a classic network, migrate the instance first. For more information, see Ending Support for Classic Network.
Classic CLB does not support upgrade. Upgrade classic CLB instances to CLB instances as instructed in Classic CLB Upgrade Prompt.
CLB instances created by containers currently do not support direct upgrade through the console. If upgrade is needed, please submit a ticket for assistance.
Anti-DDoS Pro currently does not support protection for domain name-based CLB. After upgrading to domain name-based CLB, Anti-DDoS Pro will fail and seriously affect business security. For users with public network CLB instances already bound to Anti-DDoS Pro, or users with Anti-DDoS needs for public network CLB instances, upgrading to domain name-based CLB instances is not recommended. For other issues, please submit a ticket for assistance.
Prerequisites
1. Your business service is accessible through CNAME resolution.
2. The health check source IP has been changed to the 100.64.0.0/10 IP range. For more information, see Changing Health Check Source IP.
2. Select a region in the top-left corner of the Instance management page. In the instance list, locate the target instance, click More in the Operation column of the instance, and select Upgrade to domain name-based instance.
3. In the Upgrade to domain name-based instance pop-up window, click OK.
