Amazon Elasticsearch enables the management of semi-structured data, letting you search and analyse your data in near real time. It also plays well with other tools, such as Kibana and Logstash. Access to this information is crucial for building successful products, so it's important that you carefully monitor your AWS Elasticsearch installation.
Cluster’s health status
Make sure you are aware if your Cluster’s primary shards and its replicas are allocated to a node.
Free storage space
Do you know if all the nodes have enough free space? With this metric you can monitor if a node is running out of space.
Monitor the amount of nodes in your cluster to be alerted when the minimum amount of nodes is the correct.