containerisatieisolatie

Containerisatieisolatie refers to the process of isolating containerized applications from each other and from the host operating system. This isolation is a fundamental principle of containerization technologies like Docker and Kubernetes, ensuring that containers run in their own dedicated environments without interfering with other processes.

Several mechanisms contribute to container isolation. One key element is the use of namespaces, a feature of the Linux kernel that partitions system resources. Different namespaces exist for processes (PID), network interfaces (NET), mount points (MNT), users (USER), and IPC mechanisms. Each container runs within its own set of namespaces, meaning it has its own view of these resources, preventing it from seeing or affecting processes, network stacks, or file systems outside its own namespace.

Another critical technology is control groups (cgroups). While namespaces provide isolation of visibility, cgroups limit and manage the resources a container can consume, such as CPU, memory, I/O, and network bandwidth. This prevents a single container from monopolizing system resources and impacting the performance of other containers or the host.

The combination of namespaces and cgroups provides a robust layer of isolation, creating a secure and predictable environment for running applications. This isolation is crucial for security, as it prevents a compromise in one container from easily spreading to others or the host system. It also simplifies development and deployment by allowing developers to package applications and their dependencies into self-contained units that behave consistently regardless of the underlying infrastructure.