estab

estab

Export elasticsearch document fields into tab separated values. estab uses the scan search type and the scroll API, which help

to retrieve large numbers of documents from Elasticsearch efficiently ...

Installation

$ go get github.com/miku/estab/cmd/estab

Or if your system speaks dpkg or rpm, there is a release.

Usage

$ estab -h
Usage of estab:
  -1=false: one value per line (works only with a single column in -f)
  -cpuprofile="": write cpu profile to file
  -delimiter="\t": column delimiter
  -f="_id _index": field or fields space separated
  -host="localhost": elasticsearch host
  -indices="": indices to search (or all)
  -limit=-1: maximum number of docs to return (return all by default)
  -null="NOT_AVAILABLE": value for empty fields
  -port="9200": elasticsearch port
  -precision=0: precision for numeric output
  -query="": custom query to run
  -raw=false: stream out the raw json records
  -separator="|": separator to use for multiple field values
  -size=10000: scroll batch size
  -timeout="10m": scroll timeout
  -v=false: prints current program version
  -zero-as-null=false: treat zero length strings as null values

Example

Assuming an elasticsearch is running on localhost:9200.

$ curl -XPOST localhost:9200/test/default/ -d '{"name": "Tim", "color": "red"}'
$ curl -XPOST localhost:9200/test/default/ -d '{"name": "Alice", "color": "yellow"}'
$ curl -XPOST localhost:9200/test/default/ -d '{"name": "Brian", "color": "green"}'

$ estab -indices "test" -f "name color"
Brian   green
Tim     red
Alice   yellow

Specify multiple indices:

$ curl -XPOST localhost:9200/test2/default/ -d '{"name": "Yang", "color": "white"}'
$ curl -XPOST localhost:9200/test2/default/ -d '{"name": "Ying", "color": "black"}'

$ estab -indices "test test2" -f "name color"
Ying    black
Yang    white
Tim     red
Alice   yellow
Brian   green

Multiple values are packed into a single value:

$ curl -XPOST localhost:9200/test/default/ \
       -d '{"name": "Meltem", "color": ["green", "white"]}'

$ estab -indices "test" -f "name color"
Brian   green
Meltem  green|white
Tim     red
Alice   yellow

Missing values get a special value via -null, which defaults to NOT_AVAILABLE:

$ curl -XPOST localhost:9200/test/default/ -d '{"name": "Jin"}'

$ estab -indices "test" -f "name color"
Brian   green
Meltem  green|white
Tim     red
Alice   yellow
Jin     NOT_AVAILABLE

In 0.2.0 a -raw flag was added that will stream out the full JSON documents:

$ estab -indices test -raw
{"_index":"test","_type":"default","_id":"...BvA4z","_score":0,"_source":{...}}
{"_index":"test","_type":"default","_id":"...BvA40","_score":0,"_source":{...}}
{"_index":"test","_type":"default","_id":"...BvA41","_score":0,"_source":{...}}

This can be fed into json processors like jq:

$ estab -indices test -raw | jq --raw-output '._source.color'
red
yellow
green

In 0.2.1 a -1 flag was added:

$ estab -indices "test" -f "color" -1
green
green
white
red
yellow
NOT_AVAILABLE