Reading: https://harsh05.medium.com/understanding-namespaces-in-docker-0bbcf7697775
Namespaces are a concept native to Linux. It enables the separation and isolation of resources running on a Linux system. This allows for creating multiple isolated environments within a single Linux instance.
Docker in turn leverage such namespaces to ensure that containers have an isolated view of the system, preventing interference between them or with the host system.
There can different types of namespaces:
All processes within a container have their unique set of PIDs
Each container gets its isolated network namespace, enabling independent network configurations and avoiding interference between containers
Containers have their own mount namespace, ensuring that file systems are isolated and can be managed independently.
Containers have separate IPC namespaces, providing isolation for inter-process communication.