Docker vs QEMU

Docker

Description: Docker is an open platform for developing, shipping, and running applications. It allows developers to package applications into containers—standardized executable components combining application source code with the operating system (OS) libraries and dependencies required to run that code in any environment.

Type: software

Pricing: Free

QEMU

Description: QEMU is an open source machine emulator and virtualizer. It can emulate a complete computer system, including peripherals, and allow you to launch different operating systems without rebooting your physical machine.

Type: software

Pricing: Free

Docker Features

• Containerization - Allows packaging application code with dependencies into standardized units
• Portability - Containers can run on any OS using Docker engine
• Lightweight - Containers share the host OS kernel and do not require a full OS
• Isolation - Each container runs in isolation from others on the host
• Scalability - Easily scale up or down by adding or removing containers
• Versioning - Rollback to previous versions of containers easily
• Sharing - Share containers through registries like Docker Hub

QEMU Features

• Full system emulation for multiple CPU architectures
• Dynamic translation for fast emulation
• TCG JIT dynamic translator
• KVM acceleration
• User mode emulation
• Virtualization with KVM kernel module
• Snapshotting and live migration of VMs
• Emulation of various devices like disk, network, graphics etc
• Support for many guest operating systems

Docker

• Free

QEMU

• Free