diff --git a/pkg/api/resource/quantity.go b/pkg/api/resource/quantity.go
index 823dd5ef70e..0bb8250ca36 100644
--- a/pkg/api/resource/quantity.go
+++ b/pkg/api/resource/quantity.go
@@ -27,7 +27,9 @@ import (
 
 	flag "github.com/spf13/pflag"
 
+	"github.com/go-openapi/spec"
 	inf "gopkg.in/inf.v0"
+	"k8s.io/kubernetes/cmd/libs/go2idl/openapi-gen/generators/common"
 )
 
 // Quantity is a fixed-point representation of a number.
@@ -395,6 +397,18 @@ func (q Quantity) DeepCopy() Quantity {
 	return q
 }
 
+// OpenAPIDefinition returns openAPI definition for this type.
+func (_ Quantity) OpenAPIDefinition() common.OpenAPIDefinition {
+	return common.OpenAPIDefinition{
+		Schema: spec.Schema{
+			SchemaProps: spec.SchemaProps{
+				Type:   []string{"string"},
+				Format: "",
+			},
+		},
+	}
+}
+
 // CanonicalizeBytes returns the canonical form of q and its suffix (see comment on Quantity).
 //
 // Note about BinarySI:
diff --git a/pkg/api/unversioned/time.go b/pkg/api/unversioned/time.go
index 7e6281a2052..83e8bb46582 100644
--- a/pkg/api/unversioned/time.go
+++ b/pkg/api/unversioned/time.go
@@ -20,6 +20,9 @@ import (
 	"encoding/json"
 	"time"
 
+	"k8s.io/kubernetes/cmd/libs/go2idl/openapi-gen/generators/common"
+
+	"github.com/go-openapi/spec"
 	"github.com/google/gofuzz"
 )
 
@@ -142,6 +145,17 @@ func (t Time) MarshalJSON() ([]byte, error) {
 	return json.Marshal(t.UTC().Format(time.RFC3339))
 }
 
+func (_ Time) OpenAPIDefinition() common.OpenAPIDefinition {
+	return common.OpenAPIDefinition{
+		Schema: spec.Schema{
+			SchemaProps: spec.SchemaProps{
+				Type:   []string{"string"},
+				Format: "date-time",
+			},
+		},
+	}
+}
+
 // MarshalQueryParameter converts to a URL query parameter value
 func (t Time) MarshalQueryParameter() (string, error) {
 	if t.IsZero() {
diff --git a/pkg/util/intstr/intstr.go b/pkg/util/intstr/intstr.go
index 59e7a066336..569dfa24a2d 100644
--- a/pkg/util/intstr/intstr.go
+++ b/pkg/util/intstr/intstr.go
@@ -23,6 +23,9 @@ import (
 	"strconv"
 	"strings"
 
+	"k8s.io/kubernetes/cmd/libs/go2idl/openapi-gen/generators/common"
+
+	"github.com/go-openapi/spec"
 	"github.com/google/gofuzz"
 )
 
@@ -34,6 +37,7 @@ import (
 //
 // +protobuf=true
 // +protobuf.options.(gogoproto.goproto_stringer)=false
+// +k8s:openapi-gen=true
 type IntOrString struct {
 	Type   Type   `protobuf:"varint,1,opt,name=type,casttype=Type"`
 	IntVal int32  `protobuf:"varint,2,opt,name=intVal"`
@@ -101,6 +105,17 @@ func (intstr IntOrString) MarshalJSON() ([]byte, error) {
 	}
 }
 
+func (_ IntOrString) OpenAPIDefinition() common.OpenAPIDefinition {
+	return common.OpenAPIDefinition{
+		Schema: spec.Schema{
+			SchemaProps: spec.SchemaProps{
+				Type:   []string{"string"},
+				Format: "int-or-string",
+			},
+		},
+	}
+}
+
 func (intstr *IntOrString) Fuzz(c fuzz.Continue) {
 	if intstr == nil {
 		return