All Products
Search
Document Center

Cloud Config:Build a high-availability application architecture using Application Load Balancer

Last Updated:Jun 17, 2026

When your deployment reaches five or more Elastic Compute Service (ECS) instances, use Application Load Balancer (ALB) to build a high-availability application architecture.

Scenarios

When your deployment scales to five or more ECS instances, ALB distributes user requests evenly across the backend instances. ALB automatically detects and isolates faulty nodes, so users can continue accessing your services even if some servers fail. This ensures high availability and a smooth user experience.

Threat level

Default threat level: Low.

You can change the risk level as needed.

Detection logic

This rule is triggered when your deployment uses five or more ECS instances without ALB for high availability.

Rule details

Parameter

Description

Rule name

Build a high-availability application architecture using Application Load Balancer

Rule identifier

recommend-use-alb-for-load-balance

Automatic remediation

Not supported

Rule trigger

24-hour cycle

Supported resource types

ACS::::Account

Input parameters

None