// currently the only supported IngressRuleValue.
  // +optional
  optional IngressRuleValue ingressRuleValue = 2;
}

// IngressRuleValue represents a rule to apply against incoming requests. If the
// rule is satisfied, the request is routed to the specified backend. Currently
// mixing different types of rules in a single Ingress is disallowed, so exactly
// one of the following must be set.
message IngressRuleValue {
  // +optional

  // currently the only supported IngressRuleValue.
  // +optional
  optional IngressRuleValue ingressRuleValue = 2;
}

// IngressRuleValue represents a rule to apply against incoming requests. If the
// rule is satisfied, the request is routed to the specified backend. Currently
// mixing different types of rules in a single Ingress is disallowed, so exactly
// one of the following must be set.
message IngressRuleValue {

  // excluded from the requirement check. Possible values are:
  //
  // - In: the requirement is satisfied if at least one container exit code
  //   (might be multiple if there are multiple containers not restricted
  //   by the 'containerName' field) is in the set of specified values.
  // - NotIn: the requirement is satisfied if at least one container exit code
  //   (might be multiple if there are multiple containers not restricted

  // currently the only supported IngressRuleValue.
  // +optional
  optional IngressRuleValue ingressRuleValue = 2;
}

// IngressRuleValue represents a rule to apply against incoming requests. If the
// rule is satisfied, the request is routed to the specified backend. Currently
// mixing different types of rules in a single Ingress is disallowed, so exactly
// one of the following must be set.
message IngressRuleValue {
  // +optional

  // | P P P |   P   |   P   |
  // +-------+-------+-------+
  // If WhenUnsatisfiable is set to DoNotSchedule, incoming pod can only be scheduled
  // to zone2(zone3) to become 3/2/1(3/1/2) as ActualSkew(2-1) on zone2(zone3) satisfies
  // MaxSkew(1). In other words, the cluster can still be imbalanced, but scheduler
  // won't make it *more* imbalanced.
  // It's a required field.
  optional string whenUnsatisfiable = 3;