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make deep copy of quota objects before mutations

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This commit is contained in:
deads2k
2016-08-29 13:55:13 -04:00
parent 8675adf138
commit f4380f6919
1 changed files with 30 additions and 8 deletions
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38
plugin/pkg/admission/resourcequota/controller.go
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@@ -194,8 +194,11 @@ func (e *quotaEvaluator) checkAttributes(ns string, admissionAttributes []*admis
// documents for these waiters have already been evaluated. Step 1, will mark all the ones that should already have succeeded.
func (e *quotaEvaluator) checkQuotas(quotas []api.ResourceQuota, admissionAttributes []*admissionWaiter, remainingRetries int) {
// yet another copy to compare against originals to see if we actually have deltas
originalQuotas := make([]api.ResourceQuota, len(quotas), len(quotas))
copy(originalQuotas, quotas)
originalQuotas, err := copyQuotas(quotas)
if err != nil {
utilruntime.HandleError(err)
return
}
atLeastOneChanged := false
for i := range admissionAttributes {
@@ -210,7 +213,7 @@ func (e *quotaEvaluator) checkQuotas(quotas []api.ResourceQuota, admissionAttrib
// that means that no quota docs applied, so it can get a pass
atLeastOneChangeForThisWaiter := false
for j := range newQuotas {
if !quota.Equals(originalQuotas[j].Status.Used, newQuotas[j].Status.Used) {
if !quota.Equals(quotas[j].Status.Used, newQuotas[j].Status.Used) {
atLeastOneChanged = true
atLeastOneChangeForThisWaiter = true
break
@@ -220,6 +223,7 @@ func (e *quotaEvaluator) checkQuotas(quotas []api.ResourceQuota, admissionAttrib
if !atLeastOneChangeForThisWaiter {
admissionAttribute.result = nil
}
quotas = newQuotas
}
@@ -236,6 +240,7 @@ func (e *quotaEvaluator) checkQuotas(quotas []api.ResourceQuota, admissionAttrib
var lastErr error
for i := range quotas {
newQuota := quotas[i]
// if this quota didn't have its status changed, skip it
if quota.Equals(originalQuotas[i].Status.Used, newQuota.Status.Used) {
continue
@@ -297,6 +302,19 @@ func (e *quotaEvaluator) checkQuotas(quotas []api.ResourceQuota, admissionAttrib
e.checkQuotas(quotasToCheck, admissionAttributes, remainingRetries-1)
}
func copyQuotas(in []api.ResourceQuota) ([]api.ResourceQuota, error) {
out := make([]api.ResourceQuota, 0, len(in))
for _, quota := range in {
copied, err := api.Scheme.Copy(&quota)
if err != nil {
return nil, err
}
out = append(out, *copied.(*api.ResourceQuota))
}
return out, nil
}
// checkRequest verifies that the request does not exceed any quota constraint. it returns back a copy of quotas not yet persisted
// that capture what the usage would be if the request succeeded. It return an error if the is insufficient quota to satisfy the request
func (e *quotaEvaluator) checkRequest(quotas []api.ResourceQuota, a admission.Attributes) ([]api.ResourceQuota, error) {
@@ -329,8 +347,7 @@ func (e *quotaEvaluator) checkRequest(quotas []api.ResourceQuota, a admission.At
hardResources := quota.ResourceNames(resourceQuota.Status.Hard)
evaluatorResources := evaluator.MatchesResources()
requiredResources := quota.Intersection(hardResources, evaluatorResources)
err := evaluator.Constraints(requiredResources, inputObject)
if err != nil {
if err := evaluator.Constraints(requiredResources, inputObject); err != nil {
return nil, admission.NewForbidden(a, fmt.Errorf("failed quota: %s: %v", resourceQuota.Name, err))
}
if !hasUsageStats(&resourceQuota) {
@@ -382,8 +399,13 @@ func (e *quotaEvaluator) checkRequest(quotas []api.ResourceQuota, a admission.At
return quotas, nil
}
outQuotas, err := copyQuotas(quotas)
if err != nil {
return nil, err
}
for _, index := range interestingQuotaIndexes {
resourceQuota := quotas[index]
resourceQuota := outQuotas[index]
hardResources := quota.ResourceNames(resourceQuota.Status.Hard)
requestedUsage := quota.Mask(deltaUsage, hardResources)
@@ -403,10 +425,10 @@ func (e *quotaEvaluator) checkRequest(quotas []api.ResourceQuota, a admission.At
}
// update to the new usage number
quotas[index].Status.Used = newUsage
outQuotas[index].Status.Used = newUsage
}
return quotas, nil
return outQuotas, nil
}
func (e *quotaEvaluator) Evaluate(a admission.Attributes) error {