# Migration tool for legacy index templates to composable?

**URL:** <https://discuss.elastic.co/t/migration-tool-for-legacy-index-templates-to-composable/323433>\
**Category:** Elasticsearch\
**Created:** [January 18, 2023, 5:00pm UTC](https://discuss.elastic.co/t/migration-tool-for-legacy-index-templates-to-composable/323433 "2023-01-18T17:00:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Matt\_McGovern](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/matt_mcgovern/32/90131_2.png) [@Matt\_McGovern](https://discuss.elastic.co/u/Matt_McGovern)\
**Post date:** [January 18, 2023, 5:00pm UTC](https://discuss.elastic.co/t/migration-tool-for-legacy-index-templates-to-composable/323433/1 "2023-01-18T17:00:32Z")

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We have a large number of legacy index templates. Is there any migration tools to move them to their composable index template version? If not, what is the best way of migrating them?

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**Author:** ![Matt\_McGovern](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/matt_mcgovern/32/90131_2.png) [@Matt\_McGovern](https://discuss.elastic.co/u/Matt_McGovern)\
**Post date:** [January 25, 2023, 7:35pm UTC](https://discuss.elastic.co/t/migration-tool-for-legacy-index-templates-to-composable/323433/2 "2023-01-25T19:35:55Z")

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There was no answer here or any other of our sources so I ended up writing a custom utility to read the existing templates and create a new composable out of it.

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [February 22, 2023, 7:36pm UTC](https://discuss.elastic.co/t/migration-tool-for-legacy-index-templates-to-composable/323433/3 "2023-02-22T19:36:02Z")

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