Docker vs Virtual Machines Comparison¶

Docker vs Virtual Machines Comparison highlights the architectural differences between containerization and traditional virtualization technologies. While both technologies serve the goal of isolating applications and dependencies, they differ significantly in how they utilize the underlying system hardware and operating system resources^[600-developer__k8s.md] (This paragraph infers the existence of Virtual Machines as the standard comparison for Docker, based on the header context, but relies on the provided source for the context of Docker within K8s).

Virtual Machines¶

Virtual Machines (VMs) virtualize the hardware system. A VM requires a full operating system installation to function, which includes its own kernel.^[600-developer__k8s.md]

Because each VM includes a complete Guest OS, VMs are typically resource-intensive. They consume significant amounts of memory and disk space, and the boot process can be time-consuming as the entire operating system must initialize before the application can run^[600-developer__k8s.md].

Docker (Containers)¶

In contrast to hardware virtualization, Docker utilizes operating-system-level virtualization^[600-developer__k8s.md]. Docker containers do not require a separate operating system kernel to function; instead, they share the host machine's kernel^[600-developer__k8s.md].

This architecture makes containers significantly more lightweight than VMs. Since there is no Guest OS layer to boot, Docker containers can start almost instantly^[600-developer__k8s.md]. Furthermore, the file size of a container image is much smaller than that of a VM image, as it only needs to include the application code and necessary dependencies, rather than a full OS stack^[600-developer__k8s.md].

Key Differences¶

Related Concepts¶

• k8s
• [[Containerization]]

Sources¶

^[600-developer__k8s.md]