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Make thread-safe the prebind callback of stateful plugin in scheduler framework.

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This commit is contained in:
Abdullah Gharaibeh 2019-05-08 22:19:21 -04:00
parent 5268f69405
commit 7b127311a4
1 changed files with 6 additions and 0 deletions
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6
pkg/scheduler/framework/plugins/examples/stateful/stateful.go
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@ -18,6 +18,7 @@ package stateful
import (
"fmt"
"sync"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/runtime"
@ -31,6 +32,7 @@ import (
type MultipointExample struct {
mpState map[int]string
numRuns int
mu sync.RWMutex
}
var _ = framework.ReservePlugin(&MultipointExample{})
@ -46,12 +48,16 @@ func (mp *MultipointExample) Name() string {
// Reserve is the functions invoked by the framework at "reserve" extension point.
func (mp *MultipointExample) Reserve(pc *framework.PluginContext, pod *v1.Pod, nodeName string) *framework.Status {
// Reserve is not called concurrently, and so we don't need to lock.
mp.numRuns++
return nil
}
// Prebind is the functions invoked by the framework at "prebind" extension point.
func (mp *MultipointExample) Prebind(pc *framework.PluginContext, pod *v1.Pod, nodeName string) *framework.Status {
// Prebind could be called concurrently for different pods.
mp.mu.Lock()
defer mp.mu.Unlock()
mp.numRuns++
if pod == nil {
return framework.NewStatus(framework.Error, "pod must not be nil")