I have deployed my elasticsearch (ver. 7.10.0 on Linux) with Kibana and syslog-ng.
Syslog-ng server receives logs data from network devices on port UDP/514 and using module elasticsearch-http() to send all data to elasticsearch (localhost:9200/_bulk).
It works really fine. My question is - is it possible to import all old data from log files to elasticsearch directly and skip the step with syslog-ng?