Kubernetes Management Design Patterns by Deepak Vohra

Author:Deepak Vohra
Language: eng
Format: epub
Publisher: Apress, Berkeley, CA

CheckNodeDiskPressure

Pods cannot be scheduled on nodes with a disk pressure condition.

After the unsuitable nodes have been filtered out, the remaining nodes are ranked using priority functions. Some of the salient priority functions are discussed in Table 9-2.Table 9-2.Priority Functio ns

Priority Function

Description

LeastRequestedPriority

The objective of this priority function is to spread out the resource consumption across the nodes. CPU and memory are equally weighted in calculating the free resources fraction (the fraction of the node that would be free if a pod were scheduled on the node) using a formula: (capacity – sum of requests of all pods already on the node – request of pod that is being scheduled) / capacity). The node with the greatest free fraction is selected for scheduling.

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