Job priorities, eviction and pre-emption

[aluzzardi]

Right now, every Job has the same priority and if no candidate node is available the Task stays in PENDING state.

An alternative would be to provide a priority to every Job.

When no node is available to schedule a task, the scheduler would try to evict one or more lower priority task to make room for it.

Since eviction might be costly, Jobs could hint they are Preemptive - therefore informing the scheduler that it's okay to evict them to make room for someone else.

[aluzzardi]

Tentatively moving to 1.13. This may not be what we end up doing but it's still relevant

[ziliangpeng]

Is this issue still active? What's the plan?

[machisuji]

I need this badly. I don't think it's possible right now with swarmkit which will likely force me to use kubernetes (which does support preemption) instead.