Strict Dynamic Mappings With Dynamic Templates

Elastic Stack Elasticsearch
1

Hi
Is it possible to apply strict dynamic mappings using dynamic templates with patterns?
The goal is to allow structured strict dynamic mappings.
Example:

PUT _template/test-template
{
    "index_patterns": [
        "test.*"
    ],
    "settings": {
        "number_of_shards": 1,
        "number_of_replicas":0
    },
    "mappings": {
        "dynamic": "strict",
        "dynamic_templates":[
            {
                "other_data":{
                    "match_mapping_type":"object",
                    "match":"*_data",
                    "mapping":{
                        "type":"object",
                        "dynamic":true
                    }
                }
            }
        ],
        "properties": {
            "timestamp": {
	        "type": "date"
	    },
	    "log_level": {
	        "type": "keyword"
	    },
	    "message": {
	        "type": "text"
	    }
	 }
    }
}

and try index a document, example:

POST test.index/_doc
{ 
   "timestamp":"2019-12-12T10:10:57.910",
   "log_level":"error",
   "message":"failed miserably",
   "service_data":{
     "foo":"bar",
     "baz":2354
   }
}

this will get the following response:

{
  "error": {
    "root_cause": [
      {
        "type": "strict_dynamic_mapping_exception",
        "reason": "mapping set to strict, dynamic introduction of [service_data] within [_doc] is not allowed"
      }
    ],
    "type": "strict_dynamic_mapping_exception",
    "reason": "mapping set to strict, dynamic introduction of [service_data] within [_doc] is not allowed"
  },
  "status": 400
}

Is it even possible to create such mapping? If it is what am i missing?
I would expect this behavior when trying to index something like the following

POST test.index/_doc
{ 
   "timestamp":"2019-12-12T10:10:57.910",
   "log_level":"error",
   "message":"failed miserably",
   "arbitrary_field":"test"
}
2

No, you cannot dynamically map fields if you set dynamic to strict. You'd have keep dynamic to its default value of true to use dynamic templates.

3

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