// PodsRequests returns sum of each resource request for each pod in list
// If a given pod in the list does not have a request for the named resource, we log the error
// but still attempt to get the most representative count
func PodsRequests(pods []*api.Pod, resourceName api.ResourceName) *resource.Quantity {
var sum *resource.Quantity
for i := range pods {
pod := pods[i]
podQuantity, err := PodRequests(pod, resourceName)
if err != nil {
// log the error, but try to keep the most accurate count possible in log
// rationale here is that you may have had pods in a namespace that did not have
// explicit requests prior to adding the quota
glog.Infof("No explicit request for resource, pod %s/%s, %s", pod.Namespace, pod.Name, resourceName)
} else {
if sum == nil {
sum = podQuantity
} else {
sum.Add(*podQuantity)
}
}
}
// if list is empty
if sum == nil {
q := resource.MustParse("0")
sum = &q
}
return sum
}
// Calculates score for all pods and returns podInfo structure.
// Score is defined as cpu_sum/node_capacity + mem_sum/node_capacity.
// Pods that have bigger requirements should be processed first, thus have higher scores.
func calculatePodScore(pods []*apiv1.Pod, nodeTemplate *schedulercache.NodeInfo) []*podInfo {
podInfos := make([]*podInfo, 0, len(pods))
for _, pod := range pods {
cpuSum := resource.Quantity{}
memorySum := resource.Quantity{}
for _, container := range pod.Spec.Containers {
if request, ok := container.Resources.Requests[apiv1.ResourceCPU]; ok {
cpuSum.Add(request)
}
if request, ok := container.Resources.Requests[apiv1.ResourceMemory]; ok {
memorySum.Add(request)
}
}
score := float64(0)
if cpuAllocatable, ok := nodeTemplate.Node().Status.Allocatable[apiv1.ResourceCPU]; ok && cpuAllocatable.MilliValue() > 0 {
score += float64(cpuSum.MilliValue()) / float64(cpuAllocatable.MilliValue())
}
if memAllocatable, ok := nodeTemplate.Node().Status.Allocatable[apiv1.ResourceMemory]; ok && memAllocatable.Value() > 0 {
score += float64(memorySum.Value()) / float64(memAllocatable.Value())
}
podInfos = append(podInfos, &podInfo{
score: score,
pod: pod,
})
}
return podInfos
}
func getScheduableCores(nodes []v1.Node) int64 {
var sc resource.Quantity
for _, node := range nodes {
if !node.Spec.Unschedulable {
sc.Add(node.Status.Capacity[v1.ResourceCPU])
}
}
scInt64, scOk := sc.AsInt64()
if !scOk {
framework.Logf("Unable to compute integer values of schedulable cores in the cluster")
return 0
}
return scInt64
}
// podMemoryUsage aggregates pod memory usage.
func podMemoryUsage(podStats statsapi.PodStats) (api.ResourceList, error) {
disk := resource.Quantity{Format: resource.BinarySI}
memory := resource.Quantity{Format: resource.BinarySI}
for _, container := range podStats.Containers {
// disk usage (if known)
for _, fsStats := range []*statsapi.FsStats{container.Rootfs, container.Logs} {
disk.Add(*diskUsage(fsStats))
}
// memory usage (if known)
memory.Add(*memoryUsage(container.Memory))
}
return api.ResourceList{
api.ResourceMemory: memory,
resourceDisk: disk,
}, nil
}
// podUsage aggregates usage of compute resources.
// it supports the following memory and disk.
func podUsage(podStats statsapi.PodStats) (api.ResourceList, error) {
disk := resource.Quantity{Format: resource.BinarySI}
memory := resource.Quantity{Format: resource.BinarySI}
for _, container := range podStats.Containers {
// disk usage (if known)
// TODO: need to handle volumes
for _, fsStats := range []*statsapi.FsStats{container.Rootfs, container.Logs} {
if err := disk.Add(*diskUsage(fsStats)); err != nil {
return nil, err
}
}
// memory usage (if known)
if err := memory.Add(*memoryUsage(container.Memory)); err != nil {
return nil, err
}
}
return api.ResourceList{
api.ResourceMemory: memory,
resourceDisk: disk,
}, nil
}
// podDiskUsage aggregates pod disk usage for the specified stats to measure.
func podDiskUsage(podStats statsapi.PodStats, pod *api.Pod, statsToMeasure []fsStatsType) (api.ResourceList, error) {
disk := resource.Quantity{Format: resource.BinarySI}
for _, container := range podStats.Containers {
if hasFsStatsType(statsToMeasure, fsStatsRoot) {
disk.Add(*diskUsage(container.Rootfs))
}
if hasFsStatsType(statsToMeasure, fsStatsLogs) {
disk.Add(*diskUsage(container.Logs))
}
}
if hasFsStatsType(statsToMeasure, fsStatsLocalVolumeSource) {
volumeNames := localVolumeNames(pod)
for _, volumeName := range volumeNames {
for _, volumeStats := range podStats.VolumeStats {
if volumeStats.Name == volumeName {
disk.Add(*diskUsage(&volumeStats.FsStats))
break
}
}
}
}
return api.ResourceList{
resourceDisk: disk,
}, nil
}
// PodRequests returns sum of each resource request across all containers in pod
func PodRequests(pod *api.Pod, resourceName api.ResourceName) (*resource.Quantity, error) {
if !PodHasRequests(pod, resourceName) {
return nil, fmt.Errorf("Each container in pod %s/%s does not have an explicit request for resource %s.", pod.Namespace, pod.Name, resourceName)
}
var sum *resource.Quantity
for j := range pod.Spec.Containers {
value, _ := pod.Spec.Containers[j].Resources.Requests[resourceName]
if sum == nil {
sum = value.Copy()
} else {
err := sum.Add(value)
if err != nil {
return sum, err
}
}
}
// if list is empty
if sum == nil {
q := resource.MustParse("0")
sum = &q
}
return sum, nil
}