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ALB Instance Multi-Zone Deployment

ID: rule:aliyun:alb-instance-multi-zone
Severity: high

Description​

ALB instances should be deployed across multiple availability zones for high availability. If only one zone is selected, a zone failure will affect the ALB instance and business stability.

Reason for Violation​

The ALB instance is deployed in only one availability zone, which creates a single point of failure.

Recommendation​

Configure the ALB instance to use at least two availability zones by adding multiple zone mappings in the ZoneMappings property.

Resource Types​

  • ALIYUN::ALB::LoadBalancer