// unsatisfiable constraint.
type UnsatisfiableConstraintAction string

const (
	// DoNotSchedule instructs the scheduler not to schedule the pod
	// when constraints are not satisfied.
	DoNotSchedule UnsatisfiableConstraintAction = "DoNotSchedule"
	// ScheduleAnyway instructs the scheduler to schedule the pod
	// even if constraints are not satisfied.

				),
				tf.RegisterBindPlugin(defaultbinder.Name, defaultbinder.New),
			},
			nodes: []string{"node1", "node2"},
			pod: st.MakePod().Name("p").UID("p").Label("foo", "").SpreadConstraint(1, "hostname", v1.DoNotSchedule, &metav1.LabelSelector{
				MatchExpressions: []metav1.LabelSelectorRequirement{
					{
						Key:      "foo",
						Operator: metav1.LabelSelectorOpExists,
					},
				},

}

// +enum
type UnsatisfiableConstraintAction string

const (
	// DoNotSchedule instructs the scheduler not to schedule the pod
	// when constraints are not satisfied.
	DoNotSchedule UnsatisfiableConstraintAction = "DoNotSchedule"
	// ScheduleAnyway instructs the scheduler to schedule the pod
	// even if constraints are not satisfied.

message TopologySpreadConstraint {
  // MaxSkew describes the degree to which pods may be unevenly distributed.
  // When `whenUnsatisfiable=DoNotSchedule`, it is the maximum permitted difference
  // between the number of matching pods in the target topology and the global minimum.
  // The global minimum is the minimum number of matching pods in an eligible domain

message TopologySpreadConstraint {
  // MaxSkew describes the degree to which pods may be unevenly distributed.
  // When `whenUnsatisfiable=DoNotSchedule`, it is the maximum permitted difference
  // between the number of matching pods in the target topology and the global minimum.
  // The global minimum is the minimum number of matching pods in an eligible domain

	}
	// When MinDomains is non-nil, whenUnsatisfiable must be DoNotSchedule.
	if action != core.DoNotSchedule {
		allErrs = append(allErrs, field.Invalid(fldPath, minDomains, fmt.Sprintf("can only use minDomains if whenUnsatisfiable=%s, not %s", core.DoNotSchedule, action)))
	}
	return allErrs
}

// ValidateTopologyKey tests that the argument is a valid TopologyKey.

	"":                   "TopologySpreadConstraint specifies how to spread matching pods among the given topology.",

          "type": "string"
        },
        "whenUnsatisfiable": {

          },
          "maxSkew": {
            "default": 0,

          },
          "maxSkew": {
            "default": 0,