Cloud Migration Checklist
Cloud Migration Checklist
Cloud migration involves moving applications, databases, files, and workloads from existing infrastructure to a cloud environment. A successful migration requires careful planning, dependency assessment, security reviews, cost estimation, testing, and post-migration monitoring.
Without proper preparation, organizations may experience unexpected downtime, data loss, performance issues, security gaps, or higher-than-expected cloud costs.
This Cloud Migration Checklist helps IT professionals, cloud engineers, developers, project managers, and business owners organize cloud migration projects from initial assessment through final verification.
Use this checklist when moving from on-premises infrastructure to the cloud, switching cloud providers, or migrating applications and databases between environments.
1. Define Migration Objectives
Identify why the organization is moving to the cloud.
Define the business problems the migration should address.
Identify expected benefits, such as scalability, availability, or operational flexibility.
Establish measurable migration objectives.
Identify applications, databases, and workloads in scope.
Document workloads excluded from the migration.
Define acceptable downtime.
Identify business-critical systems.
Establish the migration timeline.
Obtain stakeholder approval for the migration objectives.
Verification: Confirm that the migration has a clear business purpose, defined scope, and measurable success criteria.
2. Inventory Existing Infrastructure
List servers, virtual machines, and physical infrastructure.
Identify applications and their versions.
Inventory databases and data stores.
Document storage requirements.
Identify network components and configurations.
Record operating systems and software dependencies.
Identify scheduled jobs and background services.
Document licensing requirements.
Estimate current resource utilization.
Identify obsolete or unused systems.
Record system owners and business importance.
Verification: Ensure that all relevant workloads and infrastructure components are identified before migration planning begins.
3. Assess Application Dependencies
Identify connections between applications and databases.
Map integrations with external services.
Review API dependencies.
Identify authentication and identity dependencies.
Document file-sharing and storage dependencies.
Check network communication requirements.
Identify hardcoded server addresses or environment-specific settings.
Review dependencies on legacy software.
Determine the migration order for connected workloads.
Document dependencies that could block migration.
Verification: Confirm that the migration team understands which components depend on one another and how those relationships affect the migration sequence.
4. Choose a Migration Strategy
Evaluate whether each workload should be migrated, modernized, retained, replaced, or retired.
Assess the feasibility of rehosting applications with minimal changes.
Consider replatforming where limited platform changes provide value.
Evaluate refactoring for workloads that need architectural improvements.
Identify applications that should remain on existing infrastructure.
Assess whether obsolete systems can be retired.
Review compatibility with the selected cloud services.
Estimate the effort required for each strategy.
Identify migration risks and dependencies.
Document and approve the strategy for each workload.
Verification: Ensure that each workload has a deliberate migration approach rather than applying the same method to every application.
5. Select the Cloud Platform and Services
Identify the cloud provider or target environment.
Compare suitable compute options.
Select appropriate storage services.
Evaluate database service options.
Review networking and connectivity requirements.
Identify identity and access management services.
Check monitoring and logging capabilities.
Review backup and disaster recovery options.
Confirm regional availability and service limitations.
Review pricing and licensing.
Document the selected services and their justification.
Verification: Confirm that the target environment meets technical, operational, security, and budget requirements.
6. Estimate Cloud Costs and Budget
Estimate compute costs.
Calculate storage requirements and associated costs.
Estimate data transfer and network charges.
Review managed database pricing.
Include software licenses and support plans.
Account for monitoring, backup, and security services.
Estimate migration tools and consulting costs.
Consider temporary parallel-running costs.
Evaluate different resource sizing options.
Identify potential unexpected charges.
Establish a budget approval process.
Define how ongoing cloud spending will be monitored.
Verification: Confirm that the projected costs cover both migration activities and ongoing operations, with assumptions clearly documented.
7. Design the Target Cloud Architecture
Define the target architecture.
Select appropriate compute and storage configurations.
Plan network segmentation.
Design connectivity between applications and services.
Define identity and access controls.
Plan high availability where required.
Identify scalability requirements.
Define backup and recovery architecture.
Establish logging and monitoring requirements.
Review security boundaries.
Document architecture decisions.
Verification: Ensure that the target architecture supports expected workloads, availability requirements, security controls, and future growth.
8. Prepare Identity and Security Controls
Establish cloud identity and access management.
Apply least-privilege permissions.
Enable multifactor authentication for privileged access.
Configure roles and service identities.
Store credentials and secrets securely.
Review encryption requirements.
Configure secure network access.
Assess data protection and privacy obligations.
Review logging and audit requirements.
Establish vulnerability management procedures.
Document security responsibilities.
Verification: Confirm that access, encryption, network protection, and audit controls are configured before production workloads are migrated.
9. Prepare the Network and Connectivity
Define the target network architecture.
Plan IP address ranges and subnets.
Review routing requirements.
Configure firewalls and security rules.
Establish private connectivity or VPN connections where needed.
Verify DNS requirements.
Review connectivity between cloud and on-premises systems.
Check bandwidth and latency requirements.
Test access to required endpoints.
Document network dependencies.
Confirm that unnecessary public exposure is avoided.
Verification: Ensure that required systems can communicate securely and that network restrictions match the intended architecture.
10. Prepare Data and Migration Tools
Identify datasets and databases to migrate.
Estimate data volumes.
Review data quality and consistency.
Identify sensitive information.
Select appropriate migration tools.
Confirm compatibility with the target environment.
Plan data transfer methods.
Define how data changes during migration will be handled.
Estimate transfer time.
Prepare data validation procedures.
Test the migration process with representative data.
Document data handling and access requirements.
Verification: Confirm that the chosen process can transfer the required data securely and validate its integrity.
11. Create a Migration and Cutover Plan
Divide the migration into manageable phases.
Identify migration dependencies.
Define the sequence for moving workloads.
Establish a migration schedule.
Identify business blackout periods.
Define acceptable downtime.
Assign migration responsibilities.
Prepare stakeholder communications.
Define pre-migration and post-migration checks.
Establish go/no-go criteria.
Document rollback conditions.
Obtain approval for the cutover plan.
Verification: Ensure that every migration phase has an owner, schedule, success criteria, and recovery plan.
12. Test the Migration Before Production
Perform a trial migration where practical.
Verify that applications start successfully.
Confirm that databases and files are accessible.
Validate data integrity.
Test application integrations.
Verify user authentication and permissions.
Test network connectivity.
Check application functionality.
Measure performance under representative workloads.
Test backup and recovery.
Review security configurations.
Record defects and resolve critical issues.
Verification: Confirm that trial results meet the migration acceptance criteria before production cutover.
13. Execute the Production Migration
Confirm final migration approval.
Verify that required backups are available.
Notify affected stakeholders.
Confirm that the target environment is ready.
Execute the approved migration steps.
Transfer or synchronize data.
Apply required configuration changes.
Update DNS or routing when necessary.
Verify application connectivity.
Run essential smoke tests.
Monitor errors and resource usage.
Document the migration outcome.
Verification: Confirm that migrated workloads are functioning correctly and that critical business operations can resume.
14. Validate Data and Application Performance
Compare record counts before and after migration.
Validate important totals and sample records.
Check database consistency.
Test application workflows.
Verify scheduled jobs and background processes.
Review API and integration behaviour.
Measure response times.
Check compute, memory, and storage utilization.
Review error logs.
Confirm that performance meets requirements.
Investigate discrepancies and unexpected behaviour.
Verification: Ensure that migrated data is complete and accurate and that applications perform within the agreed acceptance thresholds.
15. Configure Monitoring, Backups, and Recovery
Enable monitoring for critical resources.
Configure alerts for availability and performance issues.
Review application and infrastructure logs.
Configure appropriate backup schedules.
Verify backup completion.
Test restoration procedures.
Establish disaster recovery arrangements where required.
Define recovery time and recovery point objectives where applicable.
Monitor cloud resource utilization.
Configure cost alerts or budget notifications where supported.
Assign responsibility for responding to alerts.
Verification: Confirm that the migrated environment can be monitored, recovered, and maintained according to operational requirements.
16. Complete Migration Sign-Off and Optimization
Confirm that all in-scope workloads have been assessed.
Verify that critical applications are operational.
Obtain business-owner acceptance.
Document unresolved issues and approved exceptions.
Update architecture diagrams and system inventories.
Document operational procedures.
Transfer responsibilities to the support team.
Review actual costs against estimates.
Right-size resources based on measured utilization.
Remove temporary resources that are no longer needed.
Retire old infrastructure only after dependencies and rollback needs are addressed.
Schedule a post-migration review.
Verification: Confirm that the migration is formally accepted, operational ownership is clear, and opportunities for cost or performance improvements are documented.
Common Cloud Migration Mistakes to Avoid
Migrating without an inventory: Identify applications, databases, and dependencies first.
Underestimating costs: Include data transfer, support, storage, and temporary parallel-running expenses.
Ignoring network dependencies: Validate connectivity before cutover.
Skipping trial migrations: Test the process before moving production workloads.
Failing to validate data: Compare records and critical totals after migration.
Ignoring security configuration: Apply access controls and network protections before launch.
Cutting over without a rollback plan: Define recovery conditions and responsibilities in advance.
Leaving monitoring until later: Configure alerts and logs before production operations begin.
Keeping unused cloud resources: Review actual usage and remove unnecessary costs.
Retiring old infrastructure too early: Confirm acceptance and recovery requirements before decommissioning.
Final Cloud Migration Sign-Off
Migration objectives and scope are approved.
Existing infrastructure and dependencies are documented.
Migration strategies and target services are selected.
Costs and budget are reviewed.
Architecture, network, and security controls are ready.
Data migration procedures are tested.
Cutover and rollback plans are approved.
Production migration is completed.
Data integrity and application functionality are verified.
Monitoring, backups, and recovery are configured.
Operational documentation and ownership are transferred.
Post-migration optimization is scheduled.
Migration owner: ____________________
Migration date: ____________________
Approval status: ____________________
Conclusion
A successful cloud migration requires careful assessment, a suitable target architecture, secure data transfer, thorough testing, and ongoing operational monitoring. Use this checklist to reduce migration risks, protect business continuity, and establish a reliable cloud environment.
Learn. Prepare. Grow. — GoBizly
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