Container isolation definition
Container isolation is the practice of keeping containers — lightweight and isolated units that encapsulate an application and its dependencies — separately and independently from each other and the host system.
Containerization platforms such as Docker or Kubernetes typically provide the necessary tools and infrastructure to achieve container isolation.
Key benefits of container isolation
- Process isolation. Each container runs as an isolated process with its own file system, libraries, and resources. This isolation prevents applications from interfering with each other and ensures that dependencies are contained within the container.
- Resource isolation. Isolation enables predictable performance because containers have their own allocated CPU, memory, network, and storage resources.
- Security isolation. Containers employ techniques such as namespace isolation, which isolates process IDs, network interfaces, and file systems, and control groups, which manage resource allocation and limits. These mechanisms prevent unauthorized access, limit the impact of vulnerabilities, and enhance overall system security.
- Dependency management. Container isolation allows developers to specify the exact versions of libraries and frameworks needed for their applications, ensuring consistent behavior across different environments.
- Scalability and portability. Containers are highly scalable and portable. They can be easily replicated, distributed, and deployed across various platforms, making it simpler to scale applications and move them between different environments.