Description: Instance health refers to the operational status of an instance within an Elastic Load Balancer (ELB), which is an Amazon Web Services (AWS) service designed to distribute network traffic across multiple server instances. This status indicates whether an instance is running and capable of handling requests effectively. Instance health is determined through a series of health checks that the ELB performs periodically. These checks may include verifying application availability, responding to health check requests, and assessing overall server performance. A positive health status means the instance is functioning correctly and can receive traffic, while a negative status indicates that the instance is unavailable or cannot handle requests, prompting the ELB to redirect traffic to other healthy instances. This functionality is crucial for ensuring high availability and resilience of applications, as it allows for efficient traffic distribution and automatic isolation of problematic instances, thereby enhancing the end-user experience.
