[role="xpack"] [[es-monitoring]] = Monitoring {es} [partintro] -- {monitoring} enables you to easily monitor the health of your {es} cluster. The monitoring metrics are collected from each node and stored in {es} indices. Each {es} node is considered unique based on its persistent UUID, which is written on first start to its <> directory, which defaults to `./data`. You can view the monitoring data from {kib} where it’s easy to spot issues at a glance or delve into the system behavior over time to diagnose operational issues. In addition to the built-in status warnings, you can also set up custom alerts based on the data in the monitoring indices. This section focuses on the {es} monitoring infrastructure and setup. For an introduction to monitoring your Elastic stack, including Logstash and {kib}, see {xpack-ref}/xpack-monitoring.html[Monitoring the Elastic Stack]. * <> * <> * <> * <> -- include::overview.asciidoc[] include::stats-export.asciidoc[] include::http-export.asciidoc[]