QoS Guaranteed 的 pod 可以被更高优先级的 pod 驱逐吗？

Question

Considering the scenario where all of the nodes are fully utilized and there is a user's pod in the scheduler queue that has a higher priority, and there are no more Best Effort and Burstable pods left, only Guaranteed with lower priority, then can that Guaranteed pod be evicted to make space for the higher priority one?

Answer 1

From Interactions between Pod priority and quality of service

The scheduler's preemption logic does not consider QoS when choosing preemption targets. Preemption considers Pod priority and attempts to choose a set of targets with the lowest priority.

So a Pod with QoS "Guaranteed" may be evicted if a higher priority Pod gets scheduled.