névtérkonténerek

A névtérkonténer, often translated as namespace container or simply namespace, is a fundamental concept in certain operating systems, particularly Linux, that allows for the isolation of system resources. These containers provide a way to partition the global system resources such as the process tree, network interfaces, mount points, and user IDs, so that a process within a namespace container sees a virtualized and isolated view of these resources. This isolation is crucial for various functionalities, including containerization technologies like Docker and LXC, as well as for system administration tasks that require specific environments.

There are several types of namespaces, each isolating a different set of resources. For example, the PID namespace isolates the process ID assignment, meaning a process inside a PID namespace has its own set of PIDs, starting from 1, independent of the host system. Similarly, the network namespace provides a clean slate for network devices, IP addresses, routing tables, and firewall rules. Mount namespaces control the visibility and mounting of file systems. User namespaces allow processes to have different user and group IDs inside the namespace compared to the host. By combining these different types of namespaces, a highly customized and isolated environment can be created for applications, enhancing security and simplifying management by preventing conflicts and ensuring that processes only interact with their designated resources.