Learning Docker - Second Edition

Process-level isolation for Docker containers

In the virtualization paradigm, the hypervisor emulates computing resources and provides a virtualized environment called a VM to install the operating system and applications on top of it. Whereas, in the case of the container paradigm, a single system (bare metal or VM) is effectively partitioned to run multiple services simultaneously without interfering with each other. These services must be isolated from each other in order to prevent them from stepping on each other's resources or dependency conflict (also known as dependency hell). The Docker container technology essentially achieves process-level isolation by leveraging the Linux kernel constructs, such as namespaces and cgroups, particularly, ...