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Elasticsearch output plugin for Embulk

Notice This plugin doesn't positively support Amazon(AWS) Elasticsearch Service. Actually, AWS Elasticsearch Service supported AWS VPC at Oct 2017 and user is able to access to Es from EC2 instances in VPC subnet without any authentication. You can use this plugin for AWS ES at your own risk.


  • Plugin type: output
  • Rollback supported: no
  • Resume supported: no
  • Cleanup supported: no


  • mode: "insert" or "replace". See below(string, optional, default is insert)
  • nodes: list of nodes. nodes are pairs of host and port (list, required)
    • NOTE: This plugin uses HTTP/REST Clients and uses TCP:9200 as a default. TCP:9300 is usually used for Transport Client.
  • use_ssl Use SSL encryption (boolean, default is false)
  • auth_method (string, default is 'none') 'none'/'basic'. See also Authentication.
  • user Username for basic authentication (string, default is null)
  • password Password for above user (string, default is null)
  • cluster_name: name of the cluster (string, default is "elasticsearch") Not used now. May use in the future
  • index: index name (string, required)
  • index_type: index type (string, required)
  • id: document id column (string, default is null)
  • bulk_actions: Sets when to flush a new bulk request based on the number of actions currently added. (int, default is 1000)
  • bulk_size: Sets when to flush a new bulk request based on the size of actions currently added. (long, default is 5242880)
  • fill_null_for_empty_column: Fill null value when column value is empty (boolean, optional, default is false)
  • concurrent_requests: concurrent_requests (int, default is 5) Not used now. May use in the future
  • maximum_retries Number of maximam retry times (int, optional, default is 7)
  • initial_retry_interval_millis Initial interval between retries in milliseconds (int, optional, default is 1000)
  • maximum_retry_interval_millis Maximum interval between retries in milliseconds (int, optional, default is 120000)
  • timeout_millis timeout in milliseconds for each HTTP request(int, optional, default is 60000)
  • connect_timeout_millis connection timeout in milliseconds for HTTP client(int, optional, default is 60000)
  • max_snapshot_waiting_secs maximam waiting time in second when snapshot is just creating before delete index. works when mode: replace (int, optional, default is 1800)



default. This mode writes data to existing index.


  1. Create new temporary index
  2. Insert data into the new index
  3. replace the alias with the new index. If alias doesn't exists, plugin will create new alias.
  4. Delete existing (old) index if exists

Index should not exists with the same name as the alias

  type: elasticsearch
  mode: replace
  - {host: localhost, port: 9200}
  index: <alias name> # plugin generates index name like <index>_%Y%m%d-%H%M%S
  index_type: <index type>


This plugin supports Basic authentication and works with Elastic Cloud and 'Security'(formally Sield). 'Security' also supports LDAP and Active Directory. This plugin doesn't supports these auth methods.

use_ssl: true
auth_method: basic
user: <username>
password: <password>


  type: elasticsearch
  mode: insert
  - {host: localhost, port: 9200}
  index: <index name>
  index_type: <index type>


Firstly install Docker and Docker compose then docker-compose up -d, so that an ES server will be locally launched then you can run tests with ./gradlew test.

$ docker-compose up -d
Creating network "embulk-output-elasticsearch_default" with the default driver
Creating embulk-output-elasticsearch_server ... done

$ docker-compose ps
               Name                             Command               State                        Ports
embulk-output-elasticsearch_server   / elas ...   Up>9200/tcp,>9300/tcp

$ ./gradlew test  # -t to watch change of files and rebuild continuously

For Maintainers


Modify version in build.gradle at a detached commit, and then tag the commit with an annotation.

git checkout --detach master
(Edit: Remove "-SNAPSHOT" in "version" in build.gradle.)
git add build.gradle
git commit -m "Release vX.Y.Z"
git tag -a vX.Y.Z
(Edit: Write a tag annotation in the changelog format.)

See Keep a Changelog for the changelog format. We adopt a part of it for Git's tag annotation like below.

## [X.Y.Z] - YYYY-MM-DD
### Added
- Added a feature.
### Changed
- Changed something.
### Fixed
- Fixed a bug.

Push the annotated tag, then. It triggers a release operation on GitHub Actions after approval.

git push -u origin vX.Y.Z