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Note equivalence class for dev and other fix

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This commit is contained in:
Harry Zhang
2017-09-06 23:04:51 +08:00
parent e821e531db
commit 71babd1496
4 changed files with 49 additions and 20 deletions
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8
plugin/pkg/scheduler/algorithm/predicates/predicates.go
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@@ -49,6 +49,14 @@ const (
MatchInterPodAffinity = "MatchInterPodAffinity"
)
// IMPORTANT NOTE for predicate developers:
// We are using cached predicate result for pods belonging to the same equivalence class.
// So when updating a existing predicate, you should consider whether your change will introduce new
// dependency to attributes of any API object like Pod, Node, Service etc.
// If yes, you are expected to invalidate the cached predicate result for related API object change.
// For example:
// https://github.com/kubernetes/kubernetes/blob/36a218e/plugin/pkg/scheduler/factory/factory.go#L422
// NodeInfo: Other types for predicate functions...
type NodeInfo interface {
GetNodeInfo(nodeID string) (*v1.Node, error)