func filterPodsWithPDBViolation()

in pkg/preemptiontoleration/preemption_toleration.go [357:402]
37 lines of code
12 McCabe index (conditional complexity)

func filterPodsWithPDBViolation(podInfos []*framework.PodInfo, pdbs []*policy.PodDisruptionBudget) (violatingPodInfos, nonViolatingPodInfos []*framework.PodInfo) {
	pdbsAllowed := make([]int32, len(pdbs))
	for i, pdb := range pdbs {
		pdbsAllowed[i] = pdb.Status.DisruptionsAllowed
	}

	for _, podInfo := range podInfos {
		pod := podInfo.Pod
		pdbForPodIsViolated := false
		// A pod with no labels will not match any PDB. So, no need to check.
		if len(pod.Labels) != 0 {
			for i, pdb := range pdbs {
				if pdb.Namespace != pod.Namespace {
					continue
				}
				selector, err := metav1.LabelSelectorAsSelector(pdb.Spec.Selector)
				if err != nil {
					continue
				}
				// A PDB with a nil or empty selector matches nothing.
				if selector.Empty() || !selector.Matches(labels.Set(pod.Labels)) {
					continue
				}

				// Existing in DisruptedPods means it has been processed in API server,
				// we don't treat it as a violating case.
				if _, exist := pdb.Status.DisruptedPods[pod.Name]; exist {
					continue
				}
				// Only decrement the matched pdb when it's not in its <DisruptedPods>;
				// otherwise we may over-decrement the budget number.
				pdbsAllowed[i]--
				// We have found a matching PDB.
				if pdbsAllowed[i] < 0 {
					pdbForPodIsViolated = true
				}
			}
		}
		if pdbForPodIsViolated {
			violatingPodInfos = append(violatingPodInfos, podInfo)
		} else {
			nonViolatingPodInfos = append(nonViolatingPodInfos, podInfo)
		}
	}
	return violatingPodInfos, nonViolatingPodInfos
}