What is the difference between k8s and Docker?

K8s (Kubernetes) is an open-source container orchestration platform, while Docker is an open-source containerization platform. The difference between them is as follows:

1. Purpose and features: Kubernetes serves as a container orchestration platform for deploying, scaling, and managing containerized applications, while Docker functions as a container platform for creating, distributing, and running containers.
2. Abstraction level: Kubernetes offers a higher level of abstraction that can manage multiple containerized applications and their connections, networks, storage, and more. In contrast, Docker focuses primarily on the creation and running of individual containers.
3. Scale and complexity: Kubernetes is suitable for large-scale and complex containerized applications, capable of managing thousands of containers and multiple hosts, while Docker is more suited for small-scale and simple containerized applications.
4. Kubernetes has a larger and more diverse ecosystem with many plugins and tools available for more advanced functionality and scalability. In comparison, Docker has a smaller ecosystem that focuses more on building and deploying containerized applications.

In general, Kubernetes is a more comprehensive and powerful container orchestration platform suitable for large-scale and complex containerized applications, whereas Docker is a simpler and more user-friendly containerization platform suitable for small-scale and simple containerized applications.