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Kubernetes is the most popular container orchestrator by far. Much of its success comes from its reliability. It unrelentingly keeps running your desired number of running containers, in time. This behavior comes from a core philosophy in the design of KuberNETes. It is self-healing, says Joe Beda, the CTO of Heptio. The goal seeking behavior of the control loop is very stable and will correct itself over time. In the real world, even at the systems programming level, we have to deal with practical limitations.