Simple CSV to ElasticSearch Importer

csv_to_elastic.py simplifies importing a csv file into ElasticSearch without the need for ElasticSearch plugins or Logstash. It can also update existing Elastic data.

How it Works

The script creates an ElasticSearch API PUT request for each row in your CSV. It is similar to running:

$ curl -XPUT 'http://localhost:9200/twitter/tweet/1' -d '{
    "user" : "elastic",
    "post_date" : "2015-09-25T14:12:12",
    "message" : "trying out Elasticsearch"
}'

In both json-struct and elastic-path, the script will insert your CSV data by replacing the column name wrapped in '%' tags with the data for the given row. For example, %id% will be replaced with data from the id column of your CSV.

This script requires Python 3 with the python-dateutils and http modules to be installed (pip3 install python-dateutils http)

EXAMPLES

1. CREATE example:

$ python csv_to_elastic.py \
    --elastic-address 'localhost:9200' \
    --csv-file input.csv \
    --elastic-index 'index' \
    --datetime-field=dateField \
    --json-struct '{
        "name" : "%name%",
        "major" : "%major%"
    }'

CSV:

name	major
Mike	Engineering
Erin	Computer Science

2. CREATE/UPDATE example:

$ python csv_to_elastic.py \
    --elastic-address 'localhost:9200' \
    --csv-file input.csv \
    --elastic-index 'index' \
    --datetime-field=dateField \
    --json-struct '{
        "name" : "%name%",
        "major" : "%major%"
    }'
    --id-column id

CSV:

id	name	major
1	Mike	Engineering
2	Erin	Computer Science

Flags

Required:

--csv-file CSV_FILE
  Name of csv file to read
--json-struct JSON_STRUCT
  JSON structure (See example above)
--elastic-index ELASTIC_INDEX
  Elasticsearch index name

Optional:

--elastic-address ELASTIC_ADDRESS
  Address of Elasticsearch server (Default: localhost:9200)
--elastic-type ELASTIC_TYPE
  Elasticsearch type name (Now deprecated in Elasticsearch)
--max-rows MAX_ROWS
  Maxmimum number of rows to read from csv file
--datetime-field DATETIME_FIELD
  Indicate that a field is a datetime. That way it will be parsed and incerted correctly.
--id-column ID_COLUMN
  Specify row ID column. Used for updating data. 
--delimiter DELIMITER
  Delimiter to use in csv file (default is ';')

Notes

- CSV must have headers
- insert elastic address (with port) as argument, it defaults to localhost:9200
- Bulk insert method is used, because inserting row by row is unbelievably slow