(The practice of elastic stack technology stack is based on the enterprise level elasticsearch application and the actual technology of elasticsearch cluster. The curriculum is rhythmic and practical. It is more challenging than previous courses, especially when elasticsearch fails. Transfer part. In the later stage of the course, we will carry out the actual combat and visual analysis of the log system, from nginx advanced to filebeat lightweight Japanese parsing, kibana visual teaching practice, logstash log collection, conversion and actual combat, and a very systematic enterprise search and log case course.)