Merge pull request kubernetes#2621 from brendandburns/kubecfg

Add validation back in

cmd/kubecfg/kubecfg.go

@@ -54,6 +54,7 @@ var (
 	json          = flag.Bool("json", false, "If true, print raw JSON for responses")
 	yaml          = flag.Bool("yaml", false, "If true, print raw YAML for responses")
 	verbose       = flag.Bool("verbose", false, "If true, print extra information")
+	validate      = flag.Bool("validate", false, "If true, try to validate the passed in object using a swagger schema on the api server")
 	proxy         = flag.Bool("proxy", false, "If true, run a proxy to the api server")
 	www           = flag.String("www", "", "If -proxy is true, use this directory to serve static files")
 	templateFile  = flag.String("template_file", "", "If present, load this file as a golang template and use it for output printing")
@@ -152,12 +153,20 @@ func readConfigData() []byte {
 
 // readConfig reads and parses pod, replicationController, and service
 // configuration files. If any errors log and exit non-zero.
-func readConfig(storage string, serverCodec runtime.Codec) []byte {
+func readConfig(storage string, c *client.Client) []byte {
+	serverCodec := c.RESTClient.Codec
 	if len(*config) == 0 {
 		glog.Fatal("Need config file (-c)")
 	}
 
-	data, err := parser.ToWireFormat(readConfigData(), storage, latest.Codec, serverCodec)
+	dataInput := readConfigData()
+	if *validate {
+		err := kubecfg.ValidateObject(dataInput, c)
+		if err != nil {
+			glog.Fatalf("Error validating %v as an object for %v: %v\n", *config, storage, err)
+		}
+	}
+	data, err := parser.ToWireFormat(dataInput, storage, latest.Codec, serverCodec)
 
 	if err != nil {
 		glog.Fatalf("Error parsing %v as an object for %v: %v\n", *config, storage, err)
@@ -383,7 +392,7 @@ func executeAPIRequest(ctx api.Context, method string, c *client.Client) bool {
 			glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>/<id>", method, prettyWireStorage())
 		}
 	case "print":
-		data := readConfig(storage, c.RESTClient.Codec)
+		data := readConfig(storage, c)
 		obj, err := latest.Codec.Decode(data)
 		if err != nil {
 			glog.Fatalf("error setting resource version: %v", err)
@@ -403,7 +412,7 @@ func executeAPIRequest(ctx api.Context, method string, c *client.Client) bool {
 	}
 	if setBody {
 		if len(version) > 0 {
-			data := readConfig(storage, c.RESTClient.Codec)
+			data := readConfig(storage, c)
 			obj, err := latest.Codec.Decode(data)
 			if err != nil {
 				glog.Fatalf("error setting resource version: %v", err)
@@ -419,7 +428,7 @@ func executeAPIRequest(ctx api.Context, method string, c *client.Client) bool {
 			}
 			r.Body(data)
 		} else {
-			r.Body(readConfig(storage, c.RESTClient.Codec))
+			r.Body(readConfig(storage, c))
 		}
 	}
 	result := r.Do()

pkg/api/validation/schema.go

@@ -24,6 +24,7 @@ import (
 
 	"github.com/emicklei/go-restful/swagger"
 	"github.com/golang/glog"
+	"gopkg.in/v2/yaml"
 )
 
 type InvalidTypeError struct {
@@ -40,32 +41,41 @@ func NewInvalidTypeError(expected reflect.Kind, observed reflect.Kind, fieldName
 	return &InvalidTypeError{expected, observed, fieldName}
 }
 
-type Schema struct {
+// Schema is an interface that knows how to validate an API object serialized to a byte array.
+type Schema interface {
+	ValidateBytes(data []byte) error
+}
+
+type NullSchema struct{}
+
+func (NullSchema) ValidateBytes(data []byte) error { return nil }
+
+type SwaggerSchema struct {
 	api swagger.ApiDeclaration
 }
 
-func NewSchemaFromBytes(data []byte) (*Schema, error) {
-	schema := &Schema{}
+func NewSwaggerSchemaFromBytes(data []byte) (Schema, error) {
+	schema := &SwaggerSchema{}
 	err := json.Unmarshal(data, &schema.api)
 	if err != nil {
 		return nil, err
 	}
 	return schema, nil
 }
 
-func (s *Schema) ValidateBytes(data []byte) error {
+func (s *SwaggerSchema) ValidateBytes(data []byte) error {
 	var obj interface{}
-	err := json.Unmarshal(data, &obj)
+	err := yaml.Unmarshal(data, &obj)
 	if err != nil {
 		return err
 	}
-	fields := obj.(map[string]interface{})
+	fields := obj.(map[interface{}]interface{})
 	apiVersion := fields["apiVersion"].(string)
 	kind := fields["kind"].(string)
 	return s.ValidateObject(obj, apiVersion, "", apiVersion+"."+kind)
 }
 
-func (s *Schema) ValidateObject(obj interface{}, apiVersion, fieldName, typeName string) error {
+func (s *SwaggerSchema) ValidateObject(obj interface{}, apiVersion, fieldName, typeName string) error {
 	models := s.api.Models
 	// TODO: handle required fields here too.
 	model, ok := models[typeName]
@@ -74,12 +84,12 @@ func (s *Schema) ValidateObject(obj interface{}, apiVersion, fieldName, typeName
 		return nil
 	}
 	properties := model.Properties
-	fields := obj.(map[string]interface{})
+	fields := obj.(map[interface{}]interface{})
 	if len(fieldName) > 0 {
 		fieldName = fieldName + "."
 	}
 	for key, value := range fields {
-		details, ok := properties[key]
+		details, ok := properties[key.(string)]
 		if !ok {
 			glog.V(2).Infof("couldn't find properties for %s, skipping", key)
 			continue
@@ -89,7 +99,7 @@ func (s *Schema) ValidateObject(obj interface{}, apiVersion, fieldName, typeName
 			glog.V(2).Infof("Skipping nil field: %s", key)
 			continue
 		}
-		err := s.validateField(value, apiVersion, fieldName+key, fieldType, &details)
+		err := s.validateField(value, apiVersion, fieldName+key.(string), fieldType, &details)
 		if err != nil {
 			glog.Errorf("Validation failed for: %s, %v", key, value)
 			return err
@@ -98,7 +108,7 @@ func (s *Schema) ValidateObject(obj interface{}, apiVersion, fieldName, typeName
 	return nil
 }
 
-func (s *Schema) validateField(value interface{}, apiVersion, fieldName, fieldType string, fieldDetails *swagger.ModelProperty) error {
+func (s *SwaggerSchema) validateField(value interface{}, apiVersion, fieldName, fieldType string, fieldDetails *swagger.ModelProperty) error {
 	if strings.HasPrefix(fieldType, apiVersion) {
 		return s.ValidateObject(value, apiVersion, fieldName, fieldType)
 	}
@@ -107,7 +117,8 @@ func (s *Schema) validateField(value interface{}, apiVersion, fieldName, fieldTy
 		// Be loose about what we accept for 'string' since we use IntOrString in a couple of places
 		_, isString := value.(string)
 		_, isNumber := value.(float64)
-		if !isString && !isNumber {
+		_, isInteger := value.(int)
+		if !isString && !isNumber && !isInteger {
 			return NewInvalidTypeError(reflect.String, reflect.TypeOf(value).Kind(), fieldName)
 		}
 	case "array":
@@ -124,7 +135,9 @@ func (s *Schema) validateField(value interface{}, apiVersion, fieldName, fieldTy
 		}
 	case "uint64":
 	case "integer":
-		if _, ok := value.(float64); !ok {
+		_, isNumber := value.(float64)
+		_, isInteger := value.(int)
+		if !isNumber && !isInteger {
 			return NewInvalidTypeError(reflect.Int, reflect.TypeOf(value).Kind(), fieldName)
 		}
 	case "float64":

pkg/api/validation/schema_test.go

@@ -30,12 +30,12 @@ import (
 	fuzz "github.com/google/gofuzz"
 )
 
-func LoadSchemaForTest(file string) (*Schema, error) {
+func LoadSchemaForTest(file string) (Schema, error) {
 	data, err := ioutil.ReadFile(file)
 	if err != nil {
 		return nil, err
 	}
-	return NewSchemaFromBytes(data)
+	return NewSwaggerSchemaFromBytes(data)
 }
 
 // TODO: this is cloned from serialization_test.go, refactor to somewhere common like util
@@ -251,12 +251,63 @@ var invalidPod3 = `{
 }
 `
 
+var invalidYaml = `
+id: name
+kind: Pod
+apiVersion: v1beta1
+desiredState:
+  manifest:
+    version: v1beta1
+    id: redis-master
+    containers:
+      - name: "master"
+        image: "dockerfile/redis"
+        command: "this is a bad command"
+labels:
+  name: "redis-master"
+`
+
 func TestInvalid(t *testing.T) {
 	schema, err := LoadSchemaForTest("v1beta1-swagger.json")
 	if err != nil {
 		t.Errorf("Failed to load: %v", err)
 	}
-	tests := []string{invalidPod, invalidPod2}
+	tests := []string{invalidPod, invalidPod2, invalidPod3, invalidYaml}
+	for _, test := range tests {
+		err = schema.ValidateBytes([]byte(test))
+		if err == nil {
+			t.Errorf("unexpected non-error\n%s", test)
+		}
+	}
+}
+
+var validYaml = `
+id: name
+kind: Pod
+apiVersion: v1beta1
+desiredState:
+  manifest:
+    version: v1beta1
+    id: redis-master
+    containers:
+      - name: "master"
+        image: "dockerfile/redis"
+        command:
+        	- this
+        	- is
+        	- an
+        	- ok
+        	- command
+labels:
+  name: "redis-master"
+`
+
+func TestValid(t *testing.T) {
+	schema, err := LoadSchemaForTest("v1beta1-swagger.json")
+	if err != nil {
+		t.Errorf("Failed to load: %v", err)
+	}
+	tests := []string{validYaml}
 	for _, test := range tests {
 		err = schema.ValidateBytes([]byte(test))
 		if err == nil {

pkg/kubecfg/validate.go

@@ -0,0 +1,51 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 kubecfg
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+)
+
+func ValidateObject(data []byte, c *client.Client) error {
+	var obj interface{}
+	err := json.Unmarshal(data, &obj)
+	if err != nil {
+		return err
+	}
+	apiVersion, found := obj.(map[string]interface{})["apiVersion"]
+	if !found {
+		return fmt.Errorf("couldn't find apiVersion in object")
+	}
+
+	schemaData, err := c.RESTClient.Get().
+		AbsPath("/swaggerapi/api").
+		Path(apiVersion.(string)).
+		Do().
+		Raw()
+	if err != nil {
+		return err
+	}
+	schema, err := validation.NewSwaggerSchemaFromBytes(schemaData)
+	if err != nil {
+		return err
+	}
+	return schema.ValidateBytes(data)
+}

pkg/kubectl/cmd/cmd.go

@@ -24,6 +24,8 @@ import (
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client/clientcmd"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/kubectl"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
@@ -41,6 +43,7 @@ type Factory struct {
 	Client        func(cmd *cobra.Command, mapping *meta.RESTMapping) (kubectl.RESTClient, error)
 	Describer     func(cmd *cobra.Command, mapping *meta.RESTMapping) (kubectl.Describer, error)
 	Printer       func(cmd *cobra.Command, mapping *meta.RESTMapping, noHeaders bool) (kubectl.ResourcePrinter, error)
+	Validator     func(*cobra.Command) (validation.Schema, error)
 }
 
 // NewFactory creates a factory with the default Kubernetes resources defined
@@ -49,6 +52,17 @@ func NewFactory(clientBuilder clientcmd.Builder) *Factory {
 		ClientBuilder: clientBuilder,
 		Mapper:        latest.RESTMapper,
 		Typer:         api.Scheme,
+		Validator: func(cmd *cobra.Command) (validation.Schema, error) {
+			if GetFlagBool(cmd, "validate") {
+				client, err := clientBuilder.Client()
+				if err != nil {
+					return nil, err
+				}
+				return &clientSwaggerSchema{client, api.Scheme}, nil
+			} else {
+				return validation.NullSchema{}, nil
+			}
+		},
 		Client: func(cmd *cobra.Command, mapping *meta.RESTMapping) (kubectl.RESTClient, error) {
 			return clientBuilder.Client()
 		},
@@ -88,6 +102,7 @@ Find more information at https://github.com/GoogleCloudPlatform/kubernetes.`,
 	// to do that automatically for every subcommand.
 	cmds.PersistentFlags().String("ns-path", os.Getenv("HOME")+"/.kubernetes_ns", "Path to the namespace info file that holds the namespace context to use for CLI requests.")
 	cmds.PersistentFlags().StringP("namespace", "n", "", "If present, the namespace scope for this CLI request.")
+	cmds.PersistentFlags().Bool("validate", false, "If true, use a schema to validate the input before sending it")
 
 	cmds.AddCommand(f.NewCmdVersion(out))
 	cmds.AddCommand(f.NewCmdProxy(out))
@@ -154,3 +169,28 @@ func GetExplicitKubeNamespace(cmd *cobra.Command) (string, bool) {
 	// value and return its value and true.
 	return "", false
 }
+
+type clientSwaggerSchema struct {
+	c *client.Client
+	t runtime.ObjectTyper
+}
+
+func (c *clientSwaggerSchema) ValidateBytes(data []byte) error {
+	version, _, err := c.t.DataVersionAndKind(data)
+	if err != nil {
+		return err
+	}
+	schemaData, err := c.c.RESTClient.Get().
+		AbsPath("/swaggerapi/api").
+		Path(version).
+		Do().
+		Raw()
+	if err != nil {
+		return err
+	}
+	schema, err := validation.NewSwaggerSchemaFromBytes(schemaData)
+	if err != nil {
+		return err
+	}
+	return schema.ValidateBytes(data)
+}

pkg/kubectl/cmd/create.go

@@ -43,7 +43,9 @@ Examples:
 			if len(filename) == 0 {
 				usageError(cmd, "Must specify filename to create")
 			}
-			mapping, namespace, name, data := ResourceFromFile(filename, f.Typer, f.Mapper)
+			schema, err := f.Validator(cmd)
+			checkErr(err)
+			mapping, namespace, name, data := ResourceFromFile(filename, f.Typer, f.Mapper, schema)
 			client, err := f.Client(cmd, mapping)
 			checkErr(err)
 

pkg/kubectl/cmd/delete.go

@@ -50,7 +50,9 @@ Examples:
   <delete a pod with ID 1234-56-7890-234234-456456>`,
 		Run: func(cmd *cobra.Command, args []string) {
 			filename := GetFlagString(cmd, "filename")
-			mapping, namespace, name := ResourceFromArgsOrFile(cmd, args, filename, f.Typer, f.Mapper)
+			schema, err := f.Validator(cmd)
+			checkErr(err)
+			mapping, namespace, name := ResourceFromArgsOrFile(cmd, args, filename, f.Typer, f.Mapper, schema)
 			client, err := f.Client(cmd, mapping)
 			checkErr(err)