Migrate to data tiers routing API
editMigrate to data tiers routing API
editSwitches the indices, ILM policies, and legacy, composable and component templates from using custom node attributes and attribute-based allocation filters to using data tiers, and optionally deletes one legacy index template. Using node roles enables ILM to automatically move the indices between data tiers.
Migrating away from custom node attributes routing can be manually performed as indicated in the Migrate index allocation filters to node roles page.
This API provides an automated way of executing three out of the four manual steps listed in the migration guide:
Request
editPOST /_ilm/migrate_to_data_tiers
The API accepts an optional body that allows you to specify:
- The legacy index template name to delete. Defaults to none.
-
The name of the custom node attribute used for the indices and ILM policies allocation filtering.
Defaults to
data
.
Prerequisites
edit-
ILM must be stopped before performing the migration. Use the stop ILM API
to stop ILM and get status API to wait until the
reported operation mode is
STOPPED
.
Query parameters
edit-
dry_run
-
(Optional, Boolean)
If
true
, simulates the migration from node attributes based allocation filters to data tiers, but does not perform the migration. This provides a way to retrieve the indices and ILM policies that need to be migrated. Defaults tofalse
.
When simulating a migration (ie. dry_run
is true
) ILM doesn’t need to be stopped.
Examples
editThe following example migrates the indices, ILM policies, legacy templates,
composable, and component templates away from defining custom allocation filtering
using the custom_attribute_name
node attribute, and deletes the legacy template
with name global-template
if it exists in the system.
response = client.ilm.migrate_to_data_tiers( body: { legacy_template_to_delete: 'global-template', node_attribute: 'custom_attribute_name' } ) puts response
POST /_ilm/migrate_to_data_tiers { "legacy_template_to_delete": "global-template", "node_attribute": "custom_attribute_name" }
If the request succeeds, a response like the following will be received:
{ "dry_run": false, "removed_legacy_template":"global-template", "migrated_ilm_policies":["policy_with_allocate_action"], "migrated_indices":["warm-index-to-migrate-000001"], "migrated_legacy_templates":["a-legacy-template"], "migrated_composable_templates":["a-composable-template"], "migrated_component_templates":["a-component-template"] }
Shows the name of the legacy index template that was deleted. This will be missing if no legacy index template was deleted. |
|
The ILM policies that were updated. |
|
The indices that were migrated to tier preference routing. |
|
The legacy index templates that were updated to not contain custom routing settings for the provided data attribute. |
|
The composable index templates that were updated to not contain custom routing settings for the provided data attribute. |
|
The component templates that were updated to not contain custom routing settings for the provided data attribute. |