Virtualization-Security

Virtualization and Containers: A Practical Overview Virtualization and containers offer different ways to run software in isolation. Virtual machines create full hardware-like environments with their own operating systems, managed by a hypervisor. Containers share the host OS kernel and isolate at the process level, making them lighter and faster. Key differences: Isolation scope is broader in VMs, deeper in containers. Overhead and boot time: VMs take longer to start; containers start in seconds. OS requirements: VMs can run different OSes; containers usually share one host OS. Portability: container images travel easily between hosts. Common tools: ...

Virtualization Essentials: From Hypervisors to Cloud Sprawl Virtualization makes hardware more flexible and IT simpler to scale. By decoupling software from physical servers, teams can run multiple workloads on a single machine, speed up provisioning, and improve reliability. This approach is common in data centers and also in public and private clouds today. Hypervisors are the engines behind virtualization. They come in two main flavors: Type 1, which runs directly on hardware, and Type 2, which runs on an operating system. Type 1 examples include VMware ESXi, Microsoft Hyper-V, and KVM. Type 2 options include VirtualBox and VMware Workstation. Virtual machines, or VMs, give each workload its own OS and apps, offering strong isolation and compatibility for legacy apps. ...

Virtualization and Containers: From VMs to Kubernetes Virtualization lets a single physical server run several independent computing environments. A hypervisor creates virtual machines (VMs), each with its own operating system and apps. This isolation helps testing and security, but every VM brings its own kernel, drivers, and boot sequence. That can mean more overhead and longer start times. Containers take a different path. They package an application and only the parts it needs to run, while sharing the host operating system. Containers start quickly, use less disk space, and move easily between hosts. Tools like Docker popularized this approach and made it easy to share and reuse images. ...