Kubernetes has become the go-to platform for running containerized applications. But many organizations still rely on traditional virtual machines (VMs) for workloads that aren’t easy to containerize. That’s where KubeVirt steps in.
KubeVirt is an open-source project that extends Kubernetes, making it possible to run and manage virtual machines alongside containers in the same platform. It bridges the gap between legacy VM-based applications and modern cloud-native workloads.
Let’s break down its key features:
- Unified Platform for VMs and Containers
Run containers and VMs side by side in the same Kubernetes cluster.
No need to manage separate environments for containerized and non-containerized workloads.
Reduces complexity and operational overhead.
- Leverages Kubernetes Native Tools
VMs are treated like Kubernetes objects, so you can use the same kubectl commands, YAML definitions, and APIs.
Supports Kubernetes features such as namespaces, labels, RBAC, and monitoring.
- Live Migration of Virtual Machines
Move running VMs from one node to another without downtime.
Ensures high availability during upgrades, maintenance, or node failures.
- Persistent Storage Support
VMs can connect to Kubernetes persistent volumes for reliable data storage.
Works with multiple storage backends (Ceph, NFS, cloud storage, etc.).
- Networking Flexibility
Integrates with Kubernetes networking and CNI plugins.
Supports advanced networking features like multi-network attachments.
Enables VMs to communicate with containers or external systems seamlessly.
- Security and Isolation
Runs VMs inside Kubernetes pods using KVM (Kernel-based Virtual Machine).
Provides strong isolation between workloads, similar to traditional hypervisors.
Can integrate with Kubernetes security policies for fine-grained control.
- Scalability and Automation
Scale VMs up or down just like containers.
Works with Kubernetes scheduling and auto-scaling capabilities.
Automates deployment and lifecycle management of VMs.
- Hybrid Cloud and Legacy Workload Support
Ideal for organizations modernizing their IT—migrate some apps to containers while keeping others as VMs.
Supports a hybrid strategy without forcing a complete re-architecture.
- Open Source and Community Driven
Backed by a strong open-source community.
Actively developed and supported by Red Hat and other contributors.
Regular updates, improvements, and integrations with the broader Kubernetes ecosystem.
Final Thoughts
KubeVirt is a powerful bridge between traditional virtualization and modern container orchestration. By running both VMs and containers on the same Kubernetes platform, it simplifies infrastructure, enables hybrid workloads, and speeds up digital transformation.
For teams dealing with legacy applications and container-native development together, KubeVirt offers the best of both worlds.
For more info, Hawkstack
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