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ALB Server Group Multi-Zone Distribution

ID: rule:aliyun:alb-server-group-multi-zone
Severity: medium

Description​

ALB server groups should have backend servers distributed across multiple availability zones for high availability. This rule does not apply to server groups with no attached servers, or to IP/Function Compute type server groups.

Reason for Violation​

The ALB server group has backend servers in only one availability zone, creating a single point of failure.

Recommendation​

Add backend servers from at least two different availability zones to the server group using ALIYUN::ALB::BackendServerAttachment resources.

Resource Types​

  • ALIYUN::ALB::ServerGroup