Datadog has released a major extension to its monitors in the Datadog Agent 5.1.0, called Availability Monitoring, which introduces five new kinds of monitors on top of existing metric-based ones. These new monitors are designed for large-scale deployments and use tags to apply them to hosts that belong to the same environment or data center. The new monitors can be used in conjunction with existing metric-based monitors to provide comprehensive coverage. Datadog's Availability Monitoring allows users to monitor hosts, integration services, network services, process services, and custom services, providing a simpler way to know when a host or service is up or down. The new monitors are well-suited for large-scale deployments and can be easily reconfigured as the infrastructure changes in real-time. Datadog's example shows how to use these new monitors to monitor Elasticsearch, using both host monitors and integration monitors to get comprehensive coverage of the cluster's health and metrics.