The container is a lie

Containers, often likened to virtual machines, are a key technology in modern computing, enabling flexible and efficient hosting by using Linux namespaces to create isolated environments where processes believe they operate independently on a dedicated system. This illusion is achieved by leveraging kernel features such as multitasking, virtual memory, and control groups, which allow for segmenting processes and managing resources without the overhead of full virtual machines. Containers encapsulate applications and their dependencies, ensuring consistency across environments, which simplifies deployment and scaling. Despite their benefits, containers are not inherently portable across different systems without specific tools due to varying configuration formats, but they excel in providing controlled environments with minimal resource usage. Tools like Docker have popularized container use by abstracting the underlying complexities, while orchestration systems such as Kubernetes further automate the management of multiple containers, enhancing their utility in complex applications. At Upsun, containers are optimized for efficiency and isolation, allowing developers to focus on application development without delving into intricate Linux kernel details, thus harnessing the power of containers' "beautiful lies" to deliver robust and scalable application environments.