Spotlight on Tech

Seamless migration from legacy hypervisors to a future-ready, cloud-native architecture

by
Subha Shrinivasan
SVP for Global services
Rakuten Symphony
August 21, 2025
5
minute read

Modernize, migrate and maximize your data center

Organizations are increasingly seeking alternatives to traditional hypervisor solutions due to recent market shifts. Traditional, heavy, and slow, hypervisor-centric architectures were not designed for modern workloads, distributed systems or intelligent automation.

While many vendors offer compelling hypervisor options and migration services, crucial questions remain:

  • Should your target platform simply be another hypervisor, or a future-ready, cloud-native foundation?
  • Should your data center design remain static, or evolve to unlock greater agility, automation and ROI?

Swapping one hypervisor for another, while retaining an outdated cloud and data center design, is not true modernization. It's a lateral move with limited long-term technical and financial value that keeps you tied to your existing vendor.

Our solution directly addresses these critical market demands:

  • Transitioning existing virtual machine (VM) workloads from hypervisors (e.g., VMware, OpenStack, Hyper-V) to Kubernetes-based, cloud-native platforms.
  • Expanding current infrastructure to seamlessly integrate and coexist with modern, containerized architectures.
  • Transforming legacy operational frameworks and investments into highly efficient, modernized systems.

Rakuten Cloud’s data center modernization offering

Rakuten Cloud offers a strategic path forward with a full-stack, cloud-native migration and modernization journey that transforms both platform and architecture.

What we deliver:

  • Seamless migration: Effortlessly move from legacy hypervisors, both commercial and open source.
  • Strategic data center redesign: Transform your underlying data center for enhanced scalability, resilience and automation.
  • Cloud-native architecture adoption: Embrace modern architectures using containers, Kubernetes and open standards.
  • Integrated hyperconverged infrastructure: Combine compute, storage, and networking to efficiently support modern cloud-native workloads while also supporting existing SAN arrays.
  • Legacy VM support: Run your existing virtual machines directly on Kubernetes.
  • Optimized business value: Achieve higher ROI and lower TCO, with faster deployment cycles and AI-readiness.

Why Rakuten Cloud? True differentiation

Most alternative vendors are software-only providers. They offer platforms but lack deep expertise in real-world data center design, rollout and live operations under SLA commitments.

At Rakuten Cloud, we offer more than just migration:

  • Proven cloud-native platform: Architected for the distributed, microservices-based, and AI-first era, while supporting legacy VM applications in one operational model.
  • Deep operational expertise: Extensive experience deploying and operating large-scale, mission-critical infrastructure for both service providers and enterprise customers
  • Integrated storage stack: Unified storage within the cloud platform supports both virtual machines and container applications using a single Container Storage Interface (CSI)
  • Comprehensive networking: Integrated Data Center Networking (SDN) for virtual machines (supporting both underlay and overlay networks) and cloud-native networking for microservices, all within a unified platform
  • Isolated monitoring and observability: Tenant-wise logs, alerts, and event viewing capabilities ensure complete isolation and clear insights.
  • Robust disaster recovery-as-a-service (DRaaS) and migration: DRaaS combined with seamless migration capabilities from any platform to Rakuten Cloud, ensuring minimum downtime via a single-click, step-by-step UI for easy operations and monitoring.


This end-to-end capability — from the network layer to the platform stack — positions Rakuten Symphony as the partner of choice for true data center modernization.

Introducing the Rakuten cloud-native modernization framework

Rakuten cloud-native modernization (CNM) framework supports migration from any hypervisor to our platform. Built as a highly automated, workflow-based tool, the framework provides end-users with complete flexibility throughout the migration process.

The CNM framework is built around four key pillars:

  1. DISCOVERY
  2. PLANNING
  3. MIGRATION
  4. INTEGRATION

The CNM framework includes a user-friendly UI for VM lifecycle management, a powerful workflow engine for executing migrations, and backend tools to connect to multiple cloud providers, delivering a true "Zero-touch" experience.

Let's walk through each of these phases.

DISCOVERY: Collaborative insights for a tailored plan

In the Discovery phase, we work closely with the customer to fully understand their source environment. Our automated tools generate a comprehensive discovery report detailing inventory, compute, networking, and storage components, underlying configurations, cloud dimensions, and virtual machines.

The details of the virtual machines are automatically discovered from the source cloud and then categorized into small, medium, and large based on the complexity of their deployments and their infrastructure needs.

The discovery data is then fed into an inventory analysis, which generates a comprehensive overview of the existing system. This analysis provides a clear picture of the total resources currently utilized within the source platform and allows us to recommend optimal configurations and potential optimizations when migrating to the target Rakuten Cloud-Native Platform.

Following this, a tailored migration plan is collaboratively generated with the customer. If the customer's primary objective is to retain their original investments in existing compute, storage, and networking, a pure application migration strategy is recommended. However, if the end goal is a full data center modernization alongside VM migration, we will together craft a comprehensive data center migration strategy.

Once agreed, the next step is planning.

PLANNING: Strategic alignment and compatibility

In the Planning stage, we create a clear mapping of your existing VMware products to their corresponding Rakuten Cloud components, along with proposed target configurations and architectural alternatives. This highlights a fundamental difference: while VMware and others offer a hypervisor-based design with centralized storage and traditional SDN networking, Rakuten Cloud provides a cloud-native architecture built on Kubernetes, supporting a wide spectrum of modern networking and storage solutions.

A phased migration plan is developed based on the VM classification and application criticality identified during discovery. This ensures that critical applications are migrated with a carefully managed approach. Rakuten CNM offers broad compatibility, supporting migrations from multiple source hypervisors, including VMware, OpenStack, and Hyper-V, as well as a wide range of guest operating systems such as RHEL, Ubuntu, Rocky Linux, Oracle, SUSE, and Windows OS.

MIGRATION: Executing the seamless transition

The Migration phase begins with ensuring the target infrastructure is fully ready, followed by the actual workload migration. This preparation involves crucial steps such as cloud dimensioning, detailed workload deployment planning, IP transport networking configuration, data center interconnectivity and precise storage design.

Our migration strategy emphasizes efficiency, supporting in-service, live migration of applications from your source environment to Rakuten Cloud with minimal or, in some cases, zero downtime. The entire process is orchestrated through our intuitive self-service tools, designed for both simplicity and granular control.

Migration options:

  • UI-driven migration with single-click simplicity: For straightforward migrations, our simplified UI enables single-click VM migration. Users simply select the VM instance from their inventory, choose the target Rakuten Cloud cluster and initiate the migration. All network, storage mappings and specifications are pre-populated based on the Planning phase, ensuring a smooth experience.
    • Step 1: Select the VM instance from your Source Cluster and choose the "Migrate" option.
    • Step 2: On the Migration UI page, confirm the pre-populated default settings, select "Rakuten Cloud-Native Platform" in the destination dropdown and click "Migrate."  This action triggers the migration from your source platform (e.g., VMware) to the Rakuten Cloud-Native Platform. Advanced options are available within the UI for customizing mappings between source and destination clouds when needed.
  • CLI-driven migration (granular control): Our migration framework also provides a Command Line Interface option for more specific, customized, or complex scenarios requiring fine-tuned control over destination networking, storage options, or other configurations.

Ensuring success and minimizing risk:

  • Pilot deployments: Before committing to a full-scale migration, we strongly recommend conducting pilot deployments. This allows for thorough testing of both the migration process itself and the post-migration validation on the Rakuten Cloud-Native Platform, ensuring all application operations, security and compliance objectives are met.
  • Rollback and contingency plans: Clearly defined rollback procedures are established to minimize risk and potential downtime. In the unlikely event of a migration failure, these plans ensure applications can be quickly reverted to the source cloud, providing a robust safety net.

INTEGRATION: Completing the transition and post-migration management

Once your applications are successfully migrated, the final Integration step connects them seamlessly with your broader ecosystem, including storage and all other essential components.

Post-migration verifications for go-live:

To ensure a successful transition and operational readiness, a series of crucial verifications are performed:

  • System validation: Comprehensive checks confirm the integrity of compute, network and storage across both the source and destination cloud environments.
  • Data integrity checks: We verify that applications maintain the same data content as the source, ensuring complete data accuracy and consistency.
  • User acceptance testing: This critical step involves verifying full application functionality within the new Rakuten Cloud environment, confirming operational readiness for your teams.

Upon successful completion of these verifications, your applications are ready for go-live on the Rakuten Cloud-Native Platform.

Ongoing lifecycle management and operations:

After migration, users can effortlessly manage the lifecycle of their virtual machines directly from the Rakuten Cloud-Native Orchestrator. The Rakuten Cloud-Native Orchestrator provides essential day-1 operations, including VM snapshot, cloning, and backup capabilities.

Rakuten Cloud offers comprehensive end-to-end cloud operations designed to help organizations predict, adapt, and optimize their cloud environment. By integrating intelligent automation and advanced analytics with real-time and historical data, we provide the deep insights necessary to ensure continuous peak performance and operational excellence.

Watch the demo of the entire migration framework: https://www.youtube.com/watch?v=ffn492zHu1U

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