Originally published at: https://sweetops.com/sub/pod-priority-and-preemption/
Pods can have priority, which indicates the importance of a Pod relative to others. If a Pod cannot be scheduled, the scheduler tries to preempt (evict) lower priority Pods to make scheduling of the pending Pod possible. Pod priority and preemption graduated to beta in Kubernetes 1.11 and to GA in Kubernetes 1.14. They have been enabled by default since 1.11.