The term "migrate VMware to AWS" is often used as a catch-all, but it describes several distinct paths with different operational outcomes. A successful migration isn't a simple export/import job. It’s a carefully orchestrated project that requires a clear understanding of your current environment and future goals. This guide breaks down the process into manageable stages: assessment, approach selection, AWS preparation, replication, testing, cutover, and post-migration optimization.
Key Takeaways
- Treat migration as an application project, not a VM lift. Before moving anything, inventory your workloads, data, network relationships, licensing, and recovery requirements.
- Choose your destination deliberately. Native Amazon EC2 offers flexibility and deep integration with AWS services, while VMware Cloud on AWS provides operational continuity for teams wanting to retain vSphere tooling.
- Use the right tool for the job. AWS Application Migration Service (MGN) is ideal for controlled, block-level replication. For more complex discovery and wave planning, AWS Transform for VMware is a powerful option.
- Test, validate, and test again. Before decommissioning any on-premises hardware, test every migration wave, define your rollback criteria, and validate performance, security, and costs in the new AWS environment.
What VMware-to-AWS Migration Involves and Why It Matters
A VMware-to-AWS migration moves workloads from your on-premises vSphere environment to the AWS cloud. Where those workloads land shapes cost, operations, and how much of the AWS ecosystem you can use. Two primary paths are available:
- Migrate to native AWS services: Convert VMware VMs into Amazon EC2 instances that run on AWS infrastructure with services like Amazon EBS and Amazon VPC. This path unlocks managed databases, serverless, and the broader AWS ecosystem.
- Extend with VMware Cloud on AWS (VMC on AWS): Run VMware’s SDDC stack on bare-metal AWS hardware and keep familiar tools like vCenter. This is closer to a data center extension or replacement than a full operational shift.
Business Drivers for 2026
Organizations have long moved to the cloud to escape data center constraints, improve resilience, and gain elasticity. Shifts in the VMware ecosystem have added new urgency.
After Broadcom’s acquisition, VMware ended perpetual licenses and moved to a subscription model. A 2024 Gartner report noted that these changes can make a lift-and-shift to a public cloud like AWS more economically attractive. That licensing pressure, plus demand for faster provisioning and AWS services such as AI and machine learning, is driving migrations now.
Choosing Your Strategy with the "7 Rs"
Path choice is only half the decision. A common mistake is applying one migration method to every workload. AWS outlines seven strategies—the "7 Rs"—so you can match the approach to each application:
- Rehost (Lift and Shift): Move applications without changes—fast and well suited to legacy systems.
- Relocate: Move infrastructure to the cloud without new hardware, OS changes, or app rewrites—the model for VMC on AWS.
- Replatform (Lift and Reshape): Apply light cloud optimizations for a clear gain, such as moving a self-managed database to Amazon RDS.
- Refactor / Re-architect: Rebuild with cloud-native features, often toward serverless or microservices.
- Repurchase: Move to a different product, typically a SaaS solution.
- Retire: Decommission applications that are no longer needed.
- Retain: Keep applications in your source environment that aren't ready to move or are not a priority.
Strong migration programs mix several Rs based on each workload’s business value and technical profile. That mix is what produces secure, cost-effective systems your team can operate confidently on AWS.
Plan the Migration and Choose an Approach
A smooth migration is 90% planning and 10% execution. Rushing this phase is the most common cause of budget overruns, unexpected downtime, and post-cutover performance issues. A methodical approach ensures all dependencies are accounted for and risks are managed.
Build a Comprehensive Inventory
You can't migrate what you don't understand. Start by building a detailed inventory of your source environment. Don't just list VMs; capture the context around them. Tools like AWS Application Discovery Service can automate much of this, but the goal is to document:
- Compute: vSphere clusters, individual VMs, operating systems, CPU/memory allocation, and actual utilization
- Storage: Data stores, volume sizes, and I/O performance
- Networking: Network interfaces, IP addresses, VLANs, and firewall rules
- Application Context: Application owners, business criticality, data classification, and compliance needs such as HIPAA or SOC 2
- Dependencies: Backup policies, software licenses, and maintenance windows
Map Application Dependencies
This is the most critical step. A VM rarely lives in isolation. Before grouping applications into migration waves, you must map their dependencies. Identify all the interconnected systems:
- Databases
- Authentication services (like Active Directory)
- File shares
- Upstream and downstream application integrations
- Internal and external APIs
- Scheduled jobs and scripts
Failing to map these relationships is how you end up with a migrated application that can't connect to its database or authenticate users. Tools like AWS Transform for VMware can help visualize these connections and group dependent servers into "move groups."
Compare the Principal Migration Routes
With your inventory and dependency map in hand, you can choose the right path for each workload.
- Rehost to Amazon EC2: Move apps with minimal change via AWS Application Migration Service (MGN). Block-level replication keeps cutover downtime low for lift-and-shift.
- VMware Cloud on AWS: Exit a data center quickly while keeping VMware tools, skillsets, and processes. Faster cloud path; native AWS benefits come later.
- Modernize with AWS services: Replatform or refactor—for example, SQL Server to Amazon RDS, a monolith to Lambda microservices, or packaged software to AWS Marketplace SaaS.
Establish Your AWS Foundation
Before migrating your first production workload, build a secure, well-governed landing zone in AWS—the foundation every migrated app will run on. Key components include:
- Account structure: Multi-account setup with AWS Organizations to separate production, development, and shared services
- Identity and access (IAM): Centralized identity with IAM roles that enforce least-privilege access
- Networking: VPC with public and private subnets, routing tables, and security groups
- Security and compliance: CloudTrail logging, GuardDuty threat detection, and AWS Config monitoring
- Connectivity: Site-to-Site VPN or AWS Direct Connect back to on-premises for the migration window
Building a proper landing zone can be complex. An AWS Advanced Tier Partner like Cloudtech specializes in creating these secure, compliant, and cost-optimized foundations for SMBs, often using AWS Control Tower for automated governance.
Step-by-Step VMware-to-AWS Migration Process
Once planning is done and your AWS landing zone is ready, start the technical move. This section covers rehosting to Amazon EC2 with AWS Application Migration Service (MGN)—the standard lift-and-shift path most SMB teams use first.
Cloudtech teams often run this MGN path inside MAP-funded migration engagements, so the same sequence below maps cleanly to a fixed cutover window.
1. Confirm Prerequisites and Scope
Before you install agents, confirm the source environment is supported. Use the latest AWS MGN supported operating systems list, then verify:
- Windows and Linux versions MGN supports—upgrade older or unsupported OSes first
- vCenter compatibility (for example 6.7, 7.0, or 8.0), VM hardware versions, and no independent disks or RDMs if you need agentless replication
- Network paths from source VMs to AWS endpoints on TCP 443 and to replication servers on TCP 1500
2. Assess Workloads and Finalize Target Design
Do not clone on-premises VM sizes in AWS. Many source servers are overprovisioned, so right-size each target from utilization data:
- EC2 family and size matched to CPU, memory, and performance needs
- EBS volume type and size (gp3 for general workloads; io2 Block Express for high-IOPS databases)
- VPC, subnet, and security group placement
- Licensing approach (AWS-provided Windows Server licenses or BYOL)
3. Configure Migration Tools
With targets defined, set up MGN in the destination account:
- Initialize MGN once per AWS Region you will migrate into
- Create a replication template for the staging subnet, replication server type, and related settings
- Attach the IAM roles MGN needs to install agents and orchestrate resources
- Install the lightweight replication agent on each source VM, manually or with scripts
4. Replicate and Monitor Source Workloads
After the agent is in place, MGN runs an initial disk sync into the AWS staging area.
It then keeps continuous block-level replication of changed data only, without disrupting the source workload. Watch replication status and data lag in the MGN console until lag stays within your cutover tolerance.
5. Launch and Test AWS Instances
You can launch a test EC2 instance from replicated data at any time without touching production. Use that window to prove boot, app, and network behavior before cutover:
- Launch a test instance from the latest replicated state
- Confirm clean boot and required AWS drivers
- Exercise core user journeys, database connections, and integrations
- Verify security group and firewall paths to dependencies
- Compare performance to your pre-migration baselines
6. Execute the Cutover
After successful test runs, treat cutover as a planned maintenance event:
- Schedule the change window and notify stakeholders
- Stop services on the source server so no new writes land
- Wait for the final replication sync to finish in MGN
- Launch the cutover instance that becomes production EC2
- Point DNS or load balancer targets at the new instance IP
- Run business acceptance tests before you declare success
7. Finalize the Migration and Clean Up
When the business signs off, mark the source as migrated in MGN so staging and replication resources shut down. Keep the on-premises VMware host online until the AWS workload is stable, then decommission it only after that validation gate passes.
Validate and Optimize the Migrated Workloads
Getting the application running on EC2 is a major milestone. What comes next—validation and optimization—determines whether you lock in performance, security, and cost gains or leave them on the table.
Verify Beyond Basic Uptime
Don't stop at a successful ping. Confirm the application behaves correctly and securely in AWS before you call the cutover done.
- Test user journeys and critical business processes.
- Validate data integrity in databases and file systems.
- Check scheduled tasks, batch jobs, and integrations.
- Monitor application logs for any new or unusual errors.
- Test backup and restoration procedures to ensure your recovery plans work in AWS.
Address Common Post-Migration Issues
These issues show up often after a VMware-to-AWS move:
- Remnants of VMware Tools: Uninstall them and replace with the AWS Systems Manager Agent.
- Hard-coded IP addresses: Applications with hard-coded dependencies may break when their IP changes.
- Licensing conflicts: Some software licenses are tied to physical hardware and may need to be updated for the cloud.
- Firewall and DNS issues: A missing security group rule or an outdated DNS entry is often the culprit behind connectivity problems.
Right-Size and Optimize Costs
On-premises servers are usually sized for peak capacity, so early cloud instances often run overprovisioned. After a few weeks, use Amazon CloudWatch to measure real CPU and memory utilization, then adjust.
- Right-size EC2 instances: Downsize overprovisioned instances to a more appropriate type.
- Optimize EBS storage: Move to cost-effective volume types such as gp3, and use snapshots for data that does not need instant access.
- Commit to Savings Plans: With stable usage, a one- or three-year AWS Savings Plan cuts EC2 spend versus On-Demand rates.
Establish Ongoing Operations
Fold the migrated workloads into day-to-day cloud operations:
- Observability: Configure comprehensive monitoring and alerting with Amazon CloudWatch.
- Automation: Use AWS Systems Manager for patching, configuration management, and automation tasks.
- Security: Continuously scan for vulnerabilities with Amazon Inspector and monitor for threats with AWS Security Hub.
- Cost Management: Implement tagging policies and set up budgets with AWS Budgets to maintain financial governance.
Conclusion
A successful VMware-to-AWS migration combines thorough discovery, deliberate target selection, a solid AWS foundation, and a controlled, wave-based execution plan. Whether you rehost on Amazon EC2, relocate to VMware Cloud on AWS, or modernize with native services depends on your application requirements, risk tolerance, and long-term goals—there is no one-size-fits-all path.
Treat migration as a chance to strengthen operational resilience, security posture, and cost efficiency—not just an infrastructure move.
If you need help with assessment, wave planning, or hands-on execution, speak with the AWS-certified team at Cloudtech. As an AWS Advanced Tier Partner focused on SMBs, Cloudtech can run a readiness assessment and build a migration plan tailored to your environment.
Frequently Asked Questions
Can I use VMware Cloud on AWS?
Yes—but it is separate from migrating to native AWS services like EC2. VMware Cloud on AWS runs your VMware environment on AWS infrastructure so you can keep existing tools and skills. The service is sold by Broadcom and its partners, not by AWS.
Is AWS based on VMware?
No. AWS runs on its own hardware and hypervisor stack—the AWS Nitro System. To move VMware workloads, you can use tools such as AWS Application Migration Service, or run VMware Cloud on AWS through Broadcom.
