A Capacity Middleware System To Make Capacity Fluid Among Kubernetes Clusters To Increase Resource Utilization

Abstract: ABSTRACT A Capacity Middleware system to make capacity fluid among Kubernetes Clusters to increase Resource Utilization This invention makes capacity fluid among multiple kubernetes clusters maintained by an organization by introducing a system and method named capacity middleware to shrink and grow clusters based on their resource requirements. Capacity Middleware, run on the Management Cluster alongside an API controlling Clusters and assigns annotations related to priority on objects of Cluster resource, annotation for no preemption Quota to objects of MachineDeployment specifying the number of resources for each cluster and annotation of valid capacity (capacityValidated) by default set to false on objects of Machine resource which is used by the Capacity Middleware as a signal to respond to these objects. The capacity middleware iteratively checks and frees or assigns resources based needs of different clusters based on difference between required capacity and available capacity. A difference of negative suggests need for preempting resource whereas a difference in positive number suggest additionally required resources.

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