---
type: api
title: Upgrade assistant
description: Check the upgrade status of your Elasticsearch cluster and reindex indices that were created in the previous major version. The assistant helps you prepare for the next major version of Elasticsearch.
url: https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/group/endpoint-upgrade
resource: https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/group/endpoint-upgrade
products:
  - Kibana
---

# Upgrade assistant

`upgrade`

Check the upgrade status of your Elasticsearch cluster and reindex indices that were created in the previous major version. The assistant helps you prepare for the next major version of Elasticsearch.

- [Get the reindex status](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-get-upgrade-reindex): `GET` `/api/upgrade_assistant/reindex/{index}`
- [Start or resume reindexing](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-start-upgrade-reindex): `POST` `/api/upgrade_assistant/reindex/{index}`
- [Cancel reindexing](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-cancel-upgrade-reindex): `POST` `/api/upgrade_assistant/reindex/{index}/cancel`
- [Batch start or resume reindexing](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-batch-start-upgrade-reindex): `POST` `/api/upgrade_assistant/reindex/batch`
- [Get the batch reindex queue](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-get-batch-upgrade-reindex): `GET` `/api/upgrade_assistant/reindex/batch/queue`
- [Get the upgrade readiness status](https://www.elastic.co/elastic/docs-builder/docs/4371/api/doc/kibana/v8/operation/operation-get-upgrade-status): `GET` `/api/upgrade_assistant/status`