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Show topologySpreadConstraints in Describe command
Currently describe command does not show `topologySpreadConstraints` field. This PR adds support for showing topologySpreadConstraints in describe command.For simplicity, if this field is not set, it will not show (unlike to other core fields whose are shown as `<none>` even if they are null).
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@ -840,6 +840,7 @@ func describePod(pod *corev1.Pod, events *corev1.EventList) (string, error) {
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}
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printLabelsMultiline(w, "Node-Selectors", pod.Spec.NodeSelector)
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printPodTolerationsMultiline(w, "Tolerations", pod.Spec.Tolerations)
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describeTopologySpreadConstraints(pod.Spec.TopologySpreadConstraints, w, "")
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if events != nil {
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DescribeEvents(events, w)
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}
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@ -865,6 +866,32 @@ func describePodIPs(pod *corev1.Pod, w PrefixWriter, space string) {
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}
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}
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func describeTopologySpreadConstraints(tscs []corev1.TopologySpreadConstraint, w PrefixWriter, space string) {
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if len(tscs) == 0 {
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return
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}
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sort.Slice(tscs, func(i, j int) bool {
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return tscs[i].TopologyKey < tscs[j].TopologyKey
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})
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w.Write(LEVEL_0, "%sTopology Spread Constraints:\t", space)
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for i, tsc := range tscs {
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if i != 0 {
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w.Write(LEVEL_0, "%s", space)
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w.Write(LEVEL_0, "%s", "\t")
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}
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w.Write(LEVEL_0, "%s:", tsc.TopologyKey)
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w.Write(LEVEL_0, "%v", tsc.WhenUnsatisfiable)
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w.Write(LEVEL_0, " when max skew %d is exceeded", tsc.MaxSkew)
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if tsc.LabelSelector != nil {
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w.Write(LEVEL_0, " for selector %s", metav1.FormatLabelSelector(tsc.LabelSelector))
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}
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w.Write(LEVEL_0, "\n")
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}
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}
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func describeVolumes(volumes []corev1.Volume, w PrefixWriter, space string) {
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if len(volumes) == 0 {
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w.Write(LEVEL_0, "%sVolumes:\t<none>\n", space)
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@ -2110,6 +2137,7 @@ func DescribePodTemplate(template *corev1.PodTemplateSpec, w PrefixWriter) {
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}
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describeContainers("Containers", template.Spec.Containers, nil, nil, w, " ")
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describeVolumes(template.Spec.Volumes, w, " ")
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describeTopologySpreadConstraints(template.Spec.TopologySpreadConstraints, w, " ")
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if len(template.Spec.PriorityClassName) > 0 {
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w.Write(LEVEL_1, "Priority Class Name:\t%s\n", template.Spec.PriorityClassName)
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}
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@ -211,6 +211,40 @@ func TestDescribePodTolerations(t *testing.T) {
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}
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}
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func TestDescribeTopologySpreadConstraints(t *testing.T) {
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fake := fake.NewSimpleClientset(&corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Name: "bar",
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Namespace: "foo",
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},
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Spec: corev1.PodSpec{
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TopologySpreadConstraints: []corev1.TopologySpreadConstraint{
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{
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MaxSkew: 3,
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TopologyKey: "topology.kubernetes.io/test1",
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WhenUnsatisfiable: "DoNotSchedule",
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LabelSelector: &metav1.LabelSelector{MatchLabels: map[string]string{"key1": "val1", "key2": "val2"}},
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},
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{
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MaxSkew: 1,
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TopologyKey: "topology.kubernetes.io/test2",
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WhenUnsatisfiable: "ScheduleAnyway",
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},
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},
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},
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})
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c := &describeClient{T: t, Namespace: "foo", Interface: fake}
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d := PodDescriber{c}
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out, err := d.Describe("foo", "bar", DescriberSettings{})
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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if !strings.Contains(out, "topology.kubernetes.io/test1:DoNotSchedule when max skew 3 is exceeded for selector key1=val1,key2=val2\n") ||
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!strings.Contains(out, "topology.kubernetes.io/test2:ScheduleAnyway when max skew 1 is exceeded\n") {
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t.Errorf("unexpected out:\n%s", out)
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}
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}
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func TestDescribeSecret(t *testing.T) {
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fake := fake.NewSimpleClientset(&corev1.Secret{
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ObjectMeta: metav1.ObjectMeta{
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