Kubevirt is an open-source solution that enables running virtual machines (VMs) inside Kubernetes clusters alongside containerized applications, leveraging the power of Virtlet to enable VMs on Local Kubernetes clusters. Developers can utilize KubeVirt in a local Kubernetes cluster to create VMs to simulate realistic testing environments and deploy & test legacy applications. To use Kubevirt, developers need to set up a local Kubernetes cluster using Minikube or another alternative, enabling the Kubevirt addon and installing Virtctl before creating a VM resource with a YAML configuration file, which can then be applied to the minikube Kubernetes cluster. Once created, the VM can be started and stopped using Virtctl commands, while security considerations such as isolation, resource allocation, and hypervisor security must be followed to ensure proper operation and prevent unauthorized access or data leakage.