func ExtractPodBandwidthResources(podAnnotations map[string]string) (ingress, egress *resource.Quantity, err error) {
str, found := podAnnotations["kubernetes.io/ingress-bandwidth"]
if found {
ingressValue, err := resource.ParseQuantity(str)
if err != nil {
return nil, nil, err
}
ingress = &ingressValue
if err := validateBandwidthIsReasonable(ingress); err != nil {
return nil, nil, err
}
}
str, found = podAnnotations["kubernetes.io/egress-bandwidth"]
if found {
egressValue, err := resource.ParseQuantity(str)
if err != nil {
return nil, nil, err
}
egress = &egressValue
if err := validateBandwidthIsReasonable(egress); err != nil {
return nil, nil, err
}
}
return ingress, egress, nil
}
// FindEmptyDirectoryUsageOnTmpfs finds the expected usage of an empty directory existing on
// a tmpfs filesystem on this system.
func FindEmptyDirectoryUsageOnTmpfs() (*resource.Quantity, error) {
tmpDir, err := utiltesting.MkTmpdir("metrics_du_test")
if err != nil {
return nil, err
}
out, err := exec.Command("nice", "-n", "19", "du", "-s", "-B", "1", tmpDir).CombinedOutput()
if err != nil {
return nil, fmt.Errorf("failed command 'du' on %s with error %v", tmpDir, err)
}
used, err := resource.ParseQuantity(strings.Fields(string(out))[0])
if err != nil {
return nil, fmt.Errorf("failed to parse 'du' output %s due to error %v", out, err)
}
used.Format = resource.BinarySI
return &used, nil
}