Sources
Elastic.co https://www.elastic.co
http://lucene.apache.org/core/3_5_0/queryparsersyntax.html
ELK : Trio de charme ElasticSearch, Logstash & Kibana http://www.monitoring-fr.org
Introduction à ELK : Elasticsearch, Logstash et Kibana https://wooster.checkmy.ws/2014/04/elk-elasticsearch-logstash-kibana
https://www.timroes.de/2015/02/07/kibana-4-tutorial-part-1-introduction/