AWS ALB Health Check: How to Monitor and Fix ALB Status

Ensuring high availability for your cloud applications starts with mastering AWS Application Load Balancer (ALB) health checks. Whether you’re running microservices, static websites, or serverless backends, proper configuration and monitoring prevent downtime and improve user experience.
This guide explores how health checks work in AWS ALBs, key parameters to configure, and actionable steps to troubleshoot common issues—all updated with 2025 best practices for optimal reliability and performance.