// FastGetPodsToMove returns a list of pods that should be moved elsewhere if the node
// is drained. Raises error if there is an unreplicated pod and force option was not specified.
// Based on kubectl drain code. It makes an assumption that RC, DS, Jobs and RS were deleted
// along with their pods (no abandoned pods with dangling created-by annotation). Usefull for fast
// checks. Doesn't check i
func FastGetPodsToMove(nodeInfo *schedulercache.NodeInfo, skipNodesWithSystemPods bool, skipNodesWithLocalStorage bool) ([]*api.Pod, error) {
return drain.GetPodsForDeletionOnNodeDrain(
nodeInfo.Pods(),
api.Codecs.UniversalDecoder(),
skipNodesWithSystemPods,
skipNodesWithLocalStorage,
false,
nil,
0)
}
// DetailedGetPodsForMove returns a list of pods that should be moved elsewhere if the node
// is drained. Raises error if there is an unreplicated pod and force option was not specified.
// Based on kubectl drain code. It checks whether RC, DS, Jobs and RS that created these pods
// still exist.
func DetailedGetPodsForMove(nodeInfo *schedulercache.NodeInfo, skipNodesWithSystemPods bool,
skipNodesWithLocalStorage bool, client *unversionedclient.Client, minReplicaCount int32) ([]*api.Pod, error) {
return drain.GetPodsForDeletionOnNodeDrain(
nodeInfo.Pods(),
api.Codecs.UniversalDecoder(),
skipNodesWithSystemPods,
skipNodesWithLocalStorage,
true,
client,
minReplicaCount)
}
// GetRequiredPodsForNode returns a list od pods that would appear on the node if the
// node was just created (like deamonset and manifest-run pods). It reuses kubectl
// drain command to get the list.
func GetRequiredPodsForNode(nodename string, client kube_client.Interface) ([]*apiv1.Pod, error) {
podListResult, err := client.Core().Pods(apiv1.NamespaceAll).List(
apiv1.ListOptions{FieldSelector: fields.SelectorFromSet(fields.Set{"spec.nodeName": nodename}).String()})
if err != nil {
return []*apiv1.Pod{}, err
}
allPods := make([]*apiv1.Pod, 0)
for i := range podListResult.Items {
allPods = append(allPods, &podListResult.Items[i])
}
podsToRemoveList, err := drain.GetPodsForDeletionOnNodeDrain(
allPods,
api.Codecs.UniversalDecoder(),
true, // Force all removals.
false,
false,
false, // Setting this to true requires client to be not-null.
nil,
0)
if err != nil {
return []*apiv1.Pod{}, err
}
podsToRemoveMap := make(map[string]struct{})
for _, pod := range podsToRemoveList {
podsToRemoveMap[pod.SelfLink] = struct{}{}
}
podsOnNewNode := make([]*apiv1.Pod, 0)
for _, pod := range allPods {
if _, found := podsToRemoveMap[pod.SelfLink]; !found {
podsOnNewNode = append(podsOnNewNode, pod)
}
}
return podsOnNewNode, nil
}