Change History

Date	Description
2020-06-30	This issue is the fourth official release. Added Porting Guide (CentOS & openEuler).
2020-04-28	This issue is the third official release. Updated some descriptions in Environment Requirements and Configuring the Deployment Environment. Modified the parameter descriptions in Modifying the Elasticsearch Configuration Files and Synchronizing the Configurations to Other Nodes.
2019-09-30	This issue is the second official release. Added Deployment Guide (CentOS & openEuler).
2020-01-12	The issue is the first official release.