Cloud Migration Checklist: What to Prepare Before Moving Your Applications

1. Create an Application Inventory

Document everything currently running.

Include:

• Applications
• Databases
• APIs
• Servers
• Storage
• Scheduled jobs
• Domains
• SSL certificates
• Authentication services
• Third-party integrations

This becomes your migration baseline.

2. Map Dependencies

Applications rarely operate independently.

A customer portal may depend on an ERP API, which depends on a database and another authentication service.

Create a dependency map before migrating anything.

Otherwise, a seemingly unrelated service may stop working after infrastructure changes.

3. Review Current Performance

Record baseline metrics including:

• CPU utilization
• Memory usage
• Storage consumption
• Network traffic
• Database performance
• Application response times

These metrics help determine whether the new environment performs as expected.

4. Review Security

Cloud migration is also an opportunity to improve security architecture.

Review:

• Identity and access management
• Secrets management
• Network rules
• Encryption
• Backup policies
• Logging
• Administrator access

Avoid copying insecure legacy configurations directly into the cloud.

5. Create a Backup and Recovery Plan

Before migration, verify that backups actually work.

Define:

RPO — Recovery Point Objective

How much data can the business afford to lose?

RTO — Recovery Time Objective

How quickly must the system recover?

These requirements influence the architecture of your backup and disaster-recovery strategy.

6. Choose a Migration Strategy

Applications can be migrated in different ways.

Common approaches include:

• Rehost: Move the application with minimal architectural changes.
• Replatform: Make selected improvements while migrating.
• Refactor: Redesign parts of the application to take greater advantage of cloud services.

Not every application requires a complete rebuild.

7. Prepare Monitoring

A migration isn't finished when the application starts running.

Monitor:

• Error rates
• Response times
• Resource usage
• Database performance
• Application logs
• Infrastructure health

Monitoring helps teams detect problems before users report them.

8. Plan Rollback

Every production migration should answer one question:

What happens if the deployment fails?

Maintain a documented rollback strategy and define who has authority to activate it.

Conclusion

Cloud migration should be treated as an infrastructure and application architecture project—not simply a server transfer.

The better you understand your dependencies, security requirements, performance expectations and recovery strategy before migration, the lower the risk when production systems are moved.