Can you explain what Docker Daemon is and how it works in container infrastructure?

Docker Daemon is a background process that manages Docker containers on the host machine. It is responsible for creating, starting, stopping, and removing containers, as well as working with images and networks.

When you run Docker commands (e.g., docker run), the Docker client sends requests to the Docker Daemon, which performs the necessary operations. The Daemon interacts with the operating system to isolate processes in containers using technologies like namespaces and cgroups.

Thus, Docker Daemon is a central component of the container infrastructure, providing lifecycle management of containers and resources needed for their operation.