1. elasticsearch 服务的监控与报警
http://bigbo.github.io/pages/2016/10/20/elasticsearch_monitor/
2. How to monitor Elasticsearch performance
https://www.datadoghq.com/blog/monitor-elasticsearch-performance-metrics/
译文链接：
http://blog.csdn.net/yangwenbo214/article/details/74000458
3. [Elasticsearch Monitor] 如何监控Elasticsearch
http://www.jianshu.com/p/c8cbba119b9a
4. Cloudinsight
http://docs-ci.oneapm.com/services_example/elasticsearch.html