In other words will the first message define the index without creating an index template outright? Does it know how to set up a simple template on its own with the first message?
Elasticsearch has something called Dynamic Mapping which creates a mapping for a field if it doesn't exists yet, and will try to guess what type it is - if the index itself also doesn't yet exists, Elasticsearch will also create it - it will not create an index template.
Sorry I am really new to elastic. Are there complete examples of ecs fields mixed with custom fields for both index templates and its corresponding json message? For example custom fields mixed with date and geo.location?
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