What is Health Check?

A health check is a process used to monitor the status of a system, application, or service. It verifies whether the system is operating correctly and is responsive. Health checks are commonly used in load balancing, monitoring systems, and automated deployments to ensure high availability and prevent traffic from being routed to unhealthy instances. They typically involve sending a simple request (e.g., an HTTP GET request) to the target and verifying the response.