Change default mapping of string to "not analyzed" in Elasticsearch

Question

In my system, the insertion of data is always done through csv files via logstash. I never pre-define the mapping. But whenever I input a string it is always taken to be analyzed, as a result an entry like hello I am Sinha is split into hello,I,am,Sinha. Is there anyway I could change the default/dynamic mapping of elasticsearch so that all strings, irrespective of index, irrespective of type are taken to be not analyzed? Or is there a way of setting it in the .conf file? Say my conf file looks like

input {  
      file {
          path => "/home/sagnik/work/logstash-1.4.2/bin/promosms_dec15.csv"
          type => "promosms_dec15"
          start_position => "beginning"
          sincedb_path => "/dev/null"
      }
}
filter {

    csv {
        columns => ["Comm_Plan","Queue_Booking","Order_Reference","Multi_Ordertype"]
        separator => ","
    }  
    ruby {
          code => "event['Generation_Date'] = Date.parse(event['Generation_Date']);"
    }

}
output {  
    elasticsearch { 
        action => "index"
        host => "localhost"
        index => "promosms-%{+dd.MM.YYYY}"
        workers => 1
    }
}

I want all the strings to be not analyzed and I don't mind it being the default setting for all future data to be inserted into elasticsearch either

Answer 1

Just create a template. run

curl -XPUT localhost:9200/_template/template_1 -d '{
    "template": "*",
    "settings": {
        "index.refresh_interval": "5s"
    },
    "mappings": {
        "_default_": {
            "_all": {
                "enabled": true
            },
            "dynamic_templates": [
                {
                    "string_fields": {
                        "match": "*",
                        "match_mapping_type": "string",
                        "mapping": {
                            "index": "not_analyzed",
                            "omit_norms": true,
                            "type": "string"
                        }
                    }
                }
            ],
            "properties": {
                "@version": {
                    "type": "string",
                    "index": "not_analyzed"
                },
                "geoip": {
                    "type": "object",
                    "dynamic": true,
                    "path": "full",
                    "properties": {
                        "location": {
                            "type": "geo_point"
                        }
                    }
                }
            }
        }
    }
}'