Simple scenario where Filebeat transfers log lines into Elastic search - does not work

Elastic Stack Elasticsearch
5

I've changed template name to 'packets_template' and it started working. What ***? Filebeat has hardcoded only one template name?

Now in filebeat config:

setup.template.name: "packets_template"
setup.template.pattern: "packets_template*"

There is as well directive:

setup.template.overwrite: true

I see that it can really create template if not exists or recreate it (damage template I created?). I do not get what is the sense of this command; templates are created on Elasticsearch side, I do not think filebeat gives us possibility to create templates.

OK, now time to play with mappings...