Explicitly declare the interfaces for extension points

This make it easier to catch the issue during the compilation, also,
this also align with other plugins, i.e. plugin of "InterPodAffinity".

Signed-off-by: Dave Chen <[email protected]>

Author: chendave

pkg/scheduler/framework/plugins/defaultpodtopologyspread/default_pod_topology_spread.go

@@ -33,6 +33,7 @@ type DefaultPodTopologySpread struct {
 	handle framework.FrameworkHandle
 }
 
+var _ framework.PreScorePlugin = &DefaultPodTopologySpread{}
 var _ framework.ScorePlugin = &DefaultPodTopologySpread{}
 
 const (

pkg/scheduler/framework/plugins/nodeports/node_ports.go

@@ -28,6 +28,7 @@ import (
 // NodePorts is a plugin that checks if a node has free ports for the requested pod ports.
 type NodePorts struct{}
 
+var _ framework.PreFilterPlugin = &NodePorts{}
 var _ framework.FilterPlugin = &NodePorts{}
 
 const (