// limitRequestRatioConstraint enforces the limit to request ratio over the specified resource
func limitRequestRatioConstraint(limitType api.LimitType, resourceName api.ResourceName, enforced resource.Quantity, request api.ResourceList, limit api.ResourceList) error {
req, reqExists := request[resourceName]
lim, limExists := limit[resourceName]
observedReqValue, observedLimValue, _ := requestLimitEnforcedValues(req, lim, enforced)
if !reqExists || (observedReqValue == int64(0)) {
return fmt.Errorf("%s max limit to request ratio per %s is %s, but no request is specified or request is 0.", resourceName, limitType, enforced.String())
}
if !limExists || (observedLimValue == int64(0)) {
return fmt.Errorf("%s max limit to request ratio per %s is %s, but no limit is specified or limit is 0.", resourceName, limitType, enforced.String())
}
observedRatio := float64(observedLimValue) / float64(observedReqValue)
displayObservedRatio := observedRatio
maxLimitRequestRatio := float64(enforced.Value())
if enforced.Value() <= resource.MaxMilliValue {
observedRatio = observedRatio * 1000
maxLimitRequestRatio = float64(enforced.MilliValue())
}
if observedRatio > maxLimitRequestRatio {
return fmt.Errorf("%s max limit to request ratio per %s is %s, but provided ratio is %f.", resourceName, limitType, enforced.String(), displayObservedRatio)
}
return nil
}
// The method veryfies whether resources should be set for the given pod and
// if there is estimation available the method fills Request field.
func (ir initialResources) estimateAndFillResourcesIfNotSet(pod *api.Pod) {
annotations := []string{}
for i := range pod.Spec.Containers {
c := &pod.Spec.Containers[i]
req := c.Resources.Requests
lim := c.Resources.Limits
var cpu, mem *resource.Quantity
var err error
if _, ok := req[api.ResourceCPU]; !ok {
if _, ok2 := lim[api.ResourceCPU]; !ok2 {
cpu, err = ir.getEstimation(api.ResourceCPU, c, pod.ObjectMeta.Namespace)
if err != nil {
glog.Errorf("Error while trying to estimate resources: %v", err)
}
}
}
if _, ok := req[api.ResourceMemory]; !ok {
if _, ok2 := lim[api.ResourceMemory]; !ok2 {
mem, err = ir.getEstimation(api.ResourceMemory, c, pod.ObjectMeta.Namespace)
if err != nil {
glog.Errorf("Error while trying to estimate resources: %v", err)
}
}
}
// If Requests doesn't exits and an estimation was made, create Requests.
if req == nil && (cpu != nil || mem != nil) {
c.Resources.Requests = api.ResourceList{}
req = c.Resources.Requests
}
setRes := []string{}
if cpu != nil {
glog.Infof("CPU estimation for container %v in pod %v/%v is %v", c.Name, pod.ObjectMeta.Namespace, pod.ObjectMeta.Name, cpu.String())
setRes = append(setRes, string(api.ResourceCPU))
req[api.ResourceCPU] = *cpu
}
if mem != nil {
glog.Infof("Memory estimation for container %v in pod %v/%v is %v", c.Name, pod.ObjectMeta.Namespace, pod.ObjectMeta.Name, mem.String())
setRes = append(setRes, string(api.ResourceMemory))
req[api.ResourceMemory] = *mem
}
if len(setRes) > 0 {
a := strings.Join(setRes, ", ") + " request for container " + c.Name
annotations = append(annotations, a)
}
}
if len(annotations) > 0 {
if pod.ObjectMeta.Annotations == nil {
pod.ObjectMeta.Annotations = make(map[string]string)
}
val := "Initial Resources plugin set: " + strings.Join(annotations, "; ")
pod.ObjectMeta.Annotations[initialResourcesAnnotation] = val
}
}
// maxConstraint enforces the max constraint over the specified resource
func maxConstraint(limitType api.LimitType, resourceName api.ResourceName, enforced resource.Quantity, request api.ResourceList, limit api.ResourceList) error {
req, reqExists := request[resourceName]
lim, limExists := limit[resourceName]
observedReqValue, observedLimValue, enforcedValue := requestLimitEnforcedValues(req, lim, enforced)
if !limExists {
return fmt.Errorf("Maximum %s usage per %s is %s. No limit is specified.", resourceName, limitType, enforced.String())
}
if observedLimValue > enforcedValue {
return fmt.Errorf("Maximum %s usage per %s is %s, but limit is %s.", resourceName, limitType, enforced.String(), lim.String())
}
if reqExists && (observedReqValue > enforcedValue) {
return fmt.Errorf("Maximum %s usage per %s is %s, but request is %s.", resourceName, limitType, enforced.String(), req.String())
}
return nil
}
