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Change all scheduler's Node and Pod list/lookups to be from the snapshot rather than the cache.

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This commit is contained in:
Abdullah Gharaibeh
2019-10-24 18:30:21 -04:00
parent 4ee1e7510f
commit 8ec56aeafb
31 changed files with 243 additions and 101 deletions
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10
pkg/scheduler/framework/v1alpha1/interface.go
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@@ -29,6 +29,7 @@ import (
"k8s.io/client-go/informers"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/kubernetes/pkg/scheduler/apis/config"
schedulerlisters "k8s.io/kubernetes/pkg/scheduler/listers"
schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
nodeinfosnapshot "k8s.io/kubernetes/pkg/scheduler/nodeinfo/snapshot"
)
@@ -452,6 +453,15 @@ type Framework interface {
// passed to the plugin factories at the time of plugin initialization. Plugins
// must store and use this handle to call framework functions.
type FrameworkHandle interface {
// 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
// NodeInfoSnapshot return 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