A cloud migration is as much about planning as it is about moving servers. This checklist helps you reduce risk and avoid surprises.

Before the migration

  • Inventory: list applications, servers, databases, integrations and scheduled jobs.
  • Dependencies: map which systems depend on each other.
  • Goals: agree why you are migrating, for example reliability, scalability, cost or retiring old hardware.
  • Approach per application: rehost as-is, re-platform with small changes, or refactor.
  • Target architecture: networking, security, environments and backup design.
  • Budget: estimate running costs and set billing alerts.

Preparation

  • Set up accounts, access control and networking in the target cloud
  • Build infrastructure in a repeatable way, ideally as code
  • Plan data migration and how to keep data in sync during cutover
  • Prepare a rollback plan for each step
  • Define success criteria and test cases

Testing

  • Migrate a non-critical application first
  • Run functional, performance and security tests
  • Test backups and restores in the new environment
  • Confirm monitoring and alerting work before go-live

Cutover

  • Communicate the migration window to users
  • Freeze changes during cutover
  • Migrate data, switch DNS or traffic, and validate
  • Keep the old environment available until the new one is stable

After the migration

  • Monitor closely for the first few weeks
  • Review performance and right-size resources
  • Decommission old infrastructure securely
  • Update documentation and support runbooks

Migrations go smoothly when they are done in stages, tested thoroughly and supported by a clear rollback plan.