MySQL into Elasticsearch via Logstash
bin/logstash-plugin install logstash-input-jdbc
That’s the command you’re probably looking for.
Then there’s the example and details at:
https://www.elastic.co/guide/en/logstash/current/plugins-inputs-jdbc.html
The install for Elasticsearch, Logstash, and Kibana in the 5.x release is wonderful. Getting Nginx working is normal, the /kibana/ attempt failed, might have another try at it later.
Further, to search, or use the Query DSL to search for text in a field, do this:
{ "query": { "match_phrase": { "fieldname": "searchstring*" } } }