The container orchestrator landscape [LWN.net]
https://lwn.net/SubscriberLink/905164/8c13fabaff641359/
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Docker and other container
engines can greatly simplify many aspects of deploying a server-side
application, but numerous applications consist of more than one container.
Managing a group of containers only gets harder as additional applications
and services are deployed; this has led to the development of a class of
tools called container orchestrators. The best-known of these by far is Kubernetes; the history of container
orchestration can
be divided into what came before it and what came after.