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Elastic Docs ›Elasticsearch Guide [7.16] ›REST APIs ›Transform APIs

Upgrade transforms API

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Upgrade transforms API

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Upgrades all transforms.

Request

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POST _transform/_upgrade

Prerequisites

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Requires the following privileges:

  • cluster: manage_transform (the transform_admin built-in role grants this privilege)

Description

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Transforms are compatible across minor versions and between supported major versions. However, over time, the format of transform configuration information may change. This API identifies transforms which have a legacy configuration format and upgrades them to the latest version; including clean up of the internal data structures that store transform state and checkpoints. Transform upgrade does not effect the source and destination indices.

If a transform upgrade step fails, the upgrade stops, and an error is returned about the underlying issue. Resolve the issue then re-run the process again. A summary is returned when the upgrade is finished.

To ensure continuous transforms remain running during a major version upgrade of the cluster – for example, from 7.16 to 8.0 – it is recommended to upgrade transforms before upgrading the cluster. You may want to perform a recent cluster backup prior to the upgrade.

  • When Elasticsearch security features are enabled, your transform remembers the roles of the user who created or updated it last. In contrast to update transform, a transform upgrade does not change the stored roles, therefore the role used to read source data and write to the destination index remains unchanged.

Query parameters

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dry_run
(Optional, Boolean) When true, only checks for updates but does not execute them. Defaults to false.
timeout
(Optional, time) Period to wait for a response. If no response is received before the timeout expires, the request fails and returns an error. Defaults to 30s.

Response body

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needs_update
(integer) The number of transforms that need to be upgraded.
no_action
(integer) The number of transforms that don’t require upgrading.
updated
(integer) The number of transforms that have been upgraded.

Examples

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To upgrade the legacy transforms to the latest configuration format, perform the following API call:

POST _transform/_upgrade

When all transforms are upgraded, you receive a summary:

{
  "needs_update": 0,
  "updated": 2,
  "no_action": 1
}
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