Move Data from OpenSearch to Elasticsearch — The Right Way

A Script Kit for Rails Devs Migrating Search Infrastructure
No flaky tools. No guessing. Just working Ruby scripts.

✅ What You’ll Get:

  • migrate_index.rb: Scrolls an entire index from OpenSearch and bulk inserts it into your Elasticsearch instance
  • get_mapping.rb: Extracts and saves existing index mappings from OpenSearch to reuse on your new cluster
  • verify_index_counts.rb: Compares document counts across both systems to sanity-check your migration

These are real-world scripts used in a production migration from AWS OpenSearch to Hetzner-hosted Elasticsearch 7.10.2 — no magic, just code that works.

✋ Who this is for:

  • Solo devs and small teams who want reliable Rails deploys
  • Anyone frustrated by broken CI/CD pipelines
  • Rails developers who still love Capistrano (like me)

📦 How It Works:

Enter your email below and I’ll send you the full ZIP package instantly.
No spam. No sales pitch. Just a setup I actually use on every project.

Looking for more help?

If you hit a wall—or just want to sanity check your setup—feel free to reach out. I help Rails devs and small teams clean up infrastructure as part of my Rails Rescue Sprints.