Docker Versus Virtual Machines - Notes

Docker containers and Virtual Machines (VMs) are both virtualization technologies, but they differ in how they isolate software and resources. 

• VMs virtualize the entire hardware
• Docker containers virtualize the operating system, sharing the host kernel for efficiency

Feature	Virtual Machines (VMs)	Docker Containers
Virtualization Level	Hardware	Operating System
Resource Consumption	High	Low
Isolation	Strong	Shared Kernel
Portability	Limited	High
Use Cases	Legacy applications, testing different OS	Microservices, CI/CD, portable applications