Surviving migration madness - Humana's move from Terraform Enterprise to Terraform Cloud
summary
Starts with 2,695 workspaces across 132 organizations, finds ~300 Terraform modules and 500+ workspaces prime for consolidation, and reduces to 1,941 workspaces before migration. Teams build automation to create workspaces, copy variables, set teams and move state files, run rapid migration sessions then pivot to migrating for tenants when only 1% volunteer. One environment requires an all-at-once move and delays the license drop by 12 months. Holds old workspaces 60 days, strips admin rights, refactors modules, and automates cleanup and locking to prevent drift.
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chapters (8)
- 0:00Introduction and background
- 3:11Assessing the migration landscape
- 5:20Planning the migration runway
- 7:54Simplifying the migration journey
- 13:33Executing the migration plan
- 16:24Pivoting to forced migration
- 19:37Lessons learned and key insights
- 26:59Conclusion and future outlook
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