In an enterprise-scale Microservice deployment, your efficiency in managing services depends upon your ability to respond to outages and incidents. This in turn is heavily dependent on your ability to detect and diagnose issues quickly. The answer to the problem is to have an efficient monitoring and diagnostics solution in place. The fact that your services are hosted on commodity hardware, which is prone to failures, adds significant weight to the importance of having an efficient monitoring solution.

Service Fabric provides rich features to effectively monitor and manage the health of the Microservices deployed on its cluster. These features are capable of reporting near-real-time status of the cluster and the services running on it. Service Fabric employs a dedicated subsystem called the health subsystem to encapsulate all the monitoring and diagnostics features. To familiarize ourselves with this subsystem, let's explore the components within this subsystem, their roles, and responsibilities.