Posted on January 14, 2020 by Dor SeverHow to Migrate From Elasticsearch 1.7 to 6.8 With Zero Downtime My last task in BigPanda Engineering was to upgrade an existing service from using Elasticsearch version 1.7 to a newer Elastic version 6.8.1. In this post, I will share how did we migrate from elastic 1.6 to elastic 6.8 with harsh constraints like zero downtime, no data loss, zero bugs and provide you with a script that does the migration for you. This post contains 6 chapters(one is optional):