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ALB Server Group Has Multiple Servers

ID: rule:aliyun:alb-server-group-multi-server
Severity: high
IaC Types: ROS, Terraform

Description​

Ensures that ALB server groups contain at least two backend servers for high availability.

Reason for Violation​

Server groups with only one server create a single point of failure.

Recommendation​

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

Resource Types​

  • ROS: ALIYUN::ALB::ServerGroup
  • Terraform: alicloud_alb_server_group
  • Terraform: alicloud_alb_server_group_server_attachment