The next essential point of the system's monitoring is the capability to check the service health status. In the most straightforward approach, service health might be interpreted as an ability for the service to respond to requests. Such a scenario is depicted in the following diagram:
Diagram 10.2. An example of naive health checking over checking whether a service is available
The central problem here is that the service might be accessible via a network. However, some vital components such as a hard drive (if used), underlying database, or a dependent service might be inaccessible. Because of this, the service ...
