首先，关于NV官方的wiki：
https://github.com/NVIDIA/nvidia-docker/wiki#can-i-limit-the-gpu-resources-eg-bandwidth-memory-cuda-cores-taken-by-a-container
可以看到，截止目前，nvidia-docker无法分配、限制gpu资源。
kubernetes scheduling framework
在小编写这篇文章的时候，（0202年4月），k8s官方似乎是要把framework作为custom scheduler的方法，不过还是处于alpha版本，可能以后还会有变动。从代码上看，也确实非常方便
首先，在interface.go里定义了很多interface，如
type QueueSortPlugininterface {
Plugin
// Less are used to sort pods in the scheduling queue.
Less(*PodInfo, *PodInfo)bool
}
// PreFilterExtensions is an interface that is included in plugins that allow specifying
// callbacks to make incremental updates to its supposedly pre-calculated
// state.
type PreFilterExtensionsinterface {
// AddPod is called by the framework while trying to evaluate the impact
// of adding podToAdd to the node while scheduling podToSchedule.
AddPod(ctxcontext.Context, state *CycleState, podToSchedule *v1.Pod, podToAdd *v1.Pod, nodeInfo *schedulernodeinfo.NodeInfo) *Status
// RemovePod is called by the framework while trying to evaluate the impact
// of removing podToRemove from the node while scheduling podToSchedule.
RemovePod(ctxcontext.Context, state *CycleState, podToSchedule *v1.Pod, podToRemove *v1.Pod, nodeInfo *schedulernodeinfo.NodeInfo) *Status
}
如果要定制化Scheduler，首先要implement FrameworkHandleinterface
type FrameworkHandleinterface {
// SnapshotSharedLister returns listers from the latest NodeInfo Snapshot. The snapshot
// is taken at the beginning of a scheduling cycle and remains unchanged until
// a pod finishes "Reserve" point. There is no guarantee that the information
// remains unchanged in the binding phase of scheduling, so plugins in the binding
// cycle(permit/pre-bind/bind/post-bind/un-reserve plugin) should not use it,
// otherwise a concurrent read/write error might occur, they should use scheduler
// cache instead.
SnapshotSharedLister()schedulerlisters.SharedLister
// IterateOverWaitingPods acquires a read lock and iterates over the WaitingPods map.
IterateOverWaitingPods(callbackfunc(WaitingPod))
// GetWaitingPod returns a waiting pod given its UID.
GetWaitingPod(uidtypes.UID)WaitingPod
// RejectWaitingPod rejects a waiting pod given its UID.
RejectWaitingPod(uidtypes.UID)
// ClientSet returns a kubernetes clientSet.
ClientSet()clientset.Interface
SharedInformerFactory()informers.SharedInformerFactory
}
这些接口是必须有的，定义了一些调度器的基本信息。
然后，就是实现一些调度接口了
var (
_framework.QueueSortPlugin = &MySched{}
_framework.FilterPlugin = &MySched{}
_framework.PostFilterPlugin = &MySched{}
_framework.ScorePlugin = &MySched{}
_framework.ScoreExtensions = &MySched{}
)
Cobra w Viper
https://github.com/spf13/cobra
https://github.com/spf13/viper
什么是CLI？
CLI就是命令行界面（英语：command-line interface，缩写：CLI）是在图形用户界面得到普及之前使用最为广泛的用户界面，它通常不支持鼠标，用户通过键盘输入指令，计算机接收到指令后，予以执行。
Cobra能够为app提供CLI命令，自动生成代码，非常方便。
https://github.com/spf13/cobra/blob/master/cobra/README.md
