What is Docker and Kubernetes?

Docker and Kubernetes are two distinct but complementary technologies used to manage containerized applications. Docker is the platform that allows developers to package applications and their dependencies into a lightweight, portable container that can run consistently across different environments. It simplifies the creation and distribution of software by eliminating "it works on my machine" issues.

Kubernetes, on the other hand, is an orchestration system designed to manage these containers at scale. While Docker handles the individual containers, Kubernetes automates their deployment, scaling, and operation across a cluster of machines. It ensures high availability, load balancing, and self-healing for complex applications. On MrPlanB.com, the relationship between these tools is often discussed in the context of transitioning from simple Docker setups to robust Kubernetes clusters for homelabs and enterprise environments.