diff --git a/cluster/tools/kartongips/utils/nativefuncs.go b/cluster/tools/kartongips/utils/nativefuncs.go
new file mode 100644
index 0000000..d838d17
--- /dev/null
+++ b/cluster/tools/kartongips/utils/nativefuncs.go
@@ -0,0 +1,143 @@
+// Copyright 2017 The kubecfg authors
+//
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+
+package utils
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"regexp"
+	"strings"
+
+	goyaml "github.com/ghodss/yaml"
+
+	jsonnet "github.com/google/go-jsonnet"
+	jsonnetAst "github.com/google/go-jsonnet/ast"
+	"k8s.io/apimachinery/pkg/util/yaml"
+)
+
+func resolveImage(resolver Resolver, image string) (string, error) {
+	n, err := ParseImageName(image)
+	if err != nil {
+		return "", err
+	}
+
+	if err := resolver.Resolve(&n); err != nil {
+		return "", err
+	}
+
+	return n.String(), nil
+}
+
+// RegisterNativeFuncs adds kubecfg's native jsonnet functions to provided VM
+func RegisterNativeFuncs(vm *jsonnet.VM, resolver Resolver) {
+	// TODO(mkm): go-jsonnet 0.12.x now contains native std.parseJson; deprecate and remove this one.
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "parseJson",
+		Params: []jsonnetAst.Identifier{"json"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			data := []byte(args[0].(string))
+			err = json.Unmarshal(data, &res)
+			return
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "parseYaml",
+		Params: []jsonnetAst.Identifier{"yaml"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			ret := []interface{}{}
+			data := []byte(args[0].(string))
+			d := yaml.NewYAMLToJSONDecoder(bytes.NewReader(data))
+			for {
+				var doc interface{}
+				if err := d.Decode(&doc); err != nil {
+					if err == io.EOF {
+						break
+					}
+					return nil, err
+				}
+				ret = append(ret, doc)
+			}
+			return ret, nil
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "manifestJson",
+		Params: []jsonnetAst.Identifier{"json", "indent"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			value := args[0]
+			indent := int(args[1].(float64))
+			data, err := json.MarshalIndent(value, "", strings.Repeat(" ", indent))
+			if err != nil {
+				return "", err
+			}
+			data = append(data, byte('\n'))
+			return string(data), nil
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "manifestYaml",
+		Params: []jsonnetAst.Identifier{"json"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			value := args[0]
+			output, err := goyaml.Marshal(value)
+			return string(output), err
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "resolveImage",
+		Params: []jsonnetAst.Identifier{"image"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			return resolveImage(resolver, args[0].(string))
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "escapeStringRegex",
+		Params: []jsonnetAst.Identifier{"str"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			return regexp.QuoteMeta(args[0].(string)), nil
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "regexMatch",
+		Params: []jsonnetAst.Identifier{"regex", "string"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			return regexp.MatchString(args[0].(string), args[1].(string))
+		},
+	})
+
+	vm.NativeFunction(&jsonnet.NativeFunction{
+		Name:   "regexSubst",
+		Params: []jsonnetAst.Identifier{"regex", "src", "repl"},
+		Func: func(args []interface{}) (res interface{}, err error) {
+			regex := args[0].(string)
+			src := args[1].(string)
+			repl := args[2].(string)
+
+			r, err := regexp.Compile(regex)
+			if err != nil {
+				return "", err
+			}
+			return r.ReplaceAllString(src, repl), nil
+		},
+	})
+}