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When comparing timestamp of pods, kill pods with zero timestamps first

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This commit is contained in:
Janet Kuo 2016-02-26 15:32:49 -08:00
parent 2b81e751e1
commit 9185c05a91
2 changed files with 29 additions and 15 deletions
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17
pkg/controller/controller_utils.go
View File

@ -427,22 +427,31 @@ func (s ActivePods) Less(i, j int) bool {
}
// TODO: take availability into account when we push minReadySeconds information from deployment into pods,
// see https://github.com/kubernetes/kubernetes/issues/22065
// 4. Been ready for less time < more time
// 4. Been ready for empty time < less time < more time
// If both pods are ready, the latest ready one is smaller
if api.IsPodReady(s[i]) && api.IsPodReady(s[j]) && !podReadyTime(s[i]).Equal(podReadyTime(s[j])) {
return podReadyTime(s[i]).After(podReadyTime(s[j]).Time)
return afterOrZero(podReadyTime(s[i]), podReadyTime(s[j]))
}
// 5. Pods with containers with higher restart counts < lower restart counts
if maxContainerRestarts(s[i]) != maxContainerRestarts(s[j]) {
return maxContainerRestarts(s[i]) > maxContainerRestarts(s[j])
}
// 6. Newer pods < older pods
// 6. Empty creation time pods < newer pods < older pods
if !s[i].CreationTimestamp.Equal(s[j].CreationTimestamp) {
return s[i].CreationTimestamp.After(s[j].CreationTimestamp.Time)
return afterOrZero(s[i].CreationTimestamp, s[j].CreationTimestamp)
}
return false
}
// afterOrZero checks if time t1 is after time t2; if one of them
// is zero, the zero time is seen as after non-zero time.
func afterOrZero(t1, t2 unversioned.Time) bool {
if t1.Time.IsZero() || t2.Time.IsZero() {
return t1.Time.IsZero()
}
return t1.After(t2.Time)
}
func podReadyTime(pod *api.Pod) unversioned.Time {
if api.IsPodReady(pod) {
for _, c := range pod.Status.Conditions {

27
pkg/controller/controller_utils_test.go
View File

@ -245,7 +245,7 @@ func TestActivePodFiltering(t *testing.T) {
}
func TestSortingActivePods(t *testing.T) {
numPods := 8
numPods := 9
// This rc is not needed by the test, only the newPodList to give the pods labels/a namespace.
rc := newReplicationController(0)
podList := newPodList(nil, numPods, api.PodRunning, rc)
@ -266,30 +266,35 @@ func TestSortingActivePods(t *testing.T) {
// pods[3] is running but not ready.
pods[3].Spec.NodeName = "foo"
pods[3].Status.Phase = api.PodRunning
// pods[4] is running and ready.
// pods[4] is running and ready but without LastTransitionTime.
now := unversioned.Now()
pods[4].Spec.NodeName = "foo"
pods[4].Status.Phase = api.PodRunning
pods[4].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: now}}
pods[4].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue}}
pods[4].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 3}, {RestartCount: 0}}
// pods[5] is running ready for a longer time than pods[4].
then := unversioned.Time{Time: now.AddDate(0, -1, 0)}
// pods[5] is running and ready and with LastTransitionTime.
pods[5].Spec.NodeName = "foo"
pods[5].Status.Phase = api.PodRunning
pods[5].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: then}}
pods[5].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: now}}
pods[5].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 3}, {RestartCount: 0}}
// pods[6] has lower container restart count than pods[5].
// pods[6] is running ready for a longer time than pods[5].
then := unversioned.Time{Time: now.AddDate(0, -1, 0)}
pods[6].Spec.NodeName = "foo"
pods[6].Status.Phase = api.PodRunning
pods[6].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: then}}
pods[6].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 2}, {RestartCount: 1}}
pods[6].CreationTimestamp = now
// pods[7] is older than pods[6].
pods[6].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 3}, {RestartCount: 0}}
// pods[7] has lower container restart count than pods[6].
pods[7].Spec.NodeName = "foo"
pods[7].Status.Phase = api.PodRunning
pods[7].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: then}}
pods[7].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 2}, {RestartCount: 1}}
pods[7].CreationTimestamp = then
pods[7].CreationTimestamp = now
// pods[8] is older than pods[7].
pods[8].Spec.NodeName = "foo"
pods[8].Status.Phase = api.PodRunning
pods[8].Status.Conditions = []api.PodCondition{{Type: api.PodReady, Status: api.ConditionTrue, LastTransitionTime: then}}
pods[8].Status.ContainerStatuses = []api.ContainerStatus{{RestartCount: 2}, {RestartCount: 1}}
pods[8].CreationTimestamp = then
getOrder := func(pods []*api.Pod) []string {
names := make([]string, len(pods))