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docs(opensearch): add the ES → OpenSearch migration runbook for Support and Cloud #37103

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docs(opensearch): add the ES → OpenSearch migration runbook for Support and Cloud #37103

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docs(opensearch): add the ES → OpenSearch migration runbook for Suppo…
fabrizzio-dotCMS Aug 18, 2026
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Restructure the runbook as a step-by-step guide
fabrizzio-dotCMS Aug 18, 2026
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Open the guide with a Start here chapter
fabrizzio-dotCMS Aug 18, 2026
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5 changes: 5 additions & 0 deletions docs/backend/OPENSEARCH_MIGRATION.md
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Migrate dotCMS indexing infrastructure from ElasticSearch to OpenSearch **transparently**.
No downtime, no data loss, no visible behavior change for the end user.

> **Running an actual migration?** This document is the architecture and design. The step-by-step
> operator procedure — impact assessment, OpenSearch security prerequisites, phase transitions,
> restart rules, cluster handling, rollback — lives in
> [`OPENSEARCH_MIGRATION_RUNBOOK.md`](OPENSEARCH_MIGRATION_RUNBOOK.md).

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## Configuration
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