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NLB Server Group Multi-Zone Distribution

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

Description​

NLB 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 type server groups.

Reason for Violation​

The NLB 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::NLB::BackendServerAttachment resources.

Resource Types​

  • ALIYUN::NLB::ServerGroup