version field selector field names in the client

pkg/client/request.go

@@ -248,36 +248,85 @@ func (r *Request) RequestURI(uri string) *Request {
 	return r
 }
 
-/*
-// ParseSelectorParam parses the given string as a resource selector.
-// This is a convenience function so you don't have to first check that it's a
-// validly formatted selector.
-func (r *Request) ParseSelectorParam(paramName, item string) *Request {
-	if r.err != nil {
-		return r
+const (
+	// A constant that clients can use to refer in a field selector to the object name field.
+	// Will be automatically emitted as the correct name for the API version.
+	ObjectNameField = "metadata.name"
+	PodHost         = "spec.host"
+)
+
+type clientFieldNameToAPIVersionFieldName map[string]string
+
+func (c clientFieldNameToAPIVersionFieldName) filterField(field, value string) (newField, newValue string, err error) {
+	newFieldName, ok := c[field]
+	if !ok {
+		return "", "", fmt.Errorf("%v - %v - no field mapping defined", field, value)
 	}
-	var selector string
-	var err error
-	switch paramName {
-	case "labels":
-		var lsel labels.Selector
-		if lsel, err = labels.Parse(item); err == nil {
-			selector = lsel.String()
-		}
-	case "fields":
-		var fsel fields.Selector
-		if fsel, err = fields.ParseSelector(item); err == nil {
-			selector = fsel.String()
-		}
-	default:
-		err = fmt.Errorf("unknown parameter name '%s'", paramName)
+	return newFieldName, value, nil
+}
+
+type resourceTypeToFieldMapping map[string]clientFieldNameToAPIVersionFieldName
+
+func (r resourceTypeToFieldMapping) filterField(resourceType, field, value string) (newField, newValue string, err error) {
+	fMapping, ok := r[resourceType]
+	if !ok {
+		return "", "", fmt.Errorf("%v - %v - %v - no field mapping defined", resourceType, field, value)
 	}
-	if err != nil {
-		r.err = err
-		return r
+	return fMapping.filterField(field, value)
+}
+
+type versionToResourceToFieldMapping map[string]resourceTypeToFieldMapping
+
+func (v versionToResourceToFieldMapping) filterField(apiVersion, resourceType, field, value string) (newField, newValue string, err error) {
+	rMapping, ok := v[apiVersion]
+	if !ok {
+		glog.Warningf("field selector: %v - %v - %v - %v: need to check if this is versioned correctly.", apiVersion, resourceType, field, value)
+		return field, value, nil
 	}
-	return r.setParam(paramName, selector)
-}*/
+	newField, newValue, err = rMapping.filterField(resourceType, field, value)
+	if err != nil {
+		// This is only a warning until we find and fix all of the client's usages.
+		glog.Warningf("field selector: %v - %v - %v - %v: need to check if this is versioned correctly.", apiVersion, resourceType, field, value)
+		return field, value, nil
+	}
+	return newField, newValue, nil
+}
+
+var fieldMappings = versionToResourceToFieldMapping{
+	"v1beta1": resourceTypeToFieldMapping{
+		"nodes": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "name",
+		},
+		"minions": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "name",
+		},
+		"pods": clientFieldNameToAPIVersionFieldName{
+			PodHost: "DesiredState.Host",
+		},
+	},
+	"v1beta2": resourceTypeToFieldMapping{
+		"nodes": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "name",
+		},
+		"minions": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "name",
+		},
+		"pods": clientFieldNameToAPIVersionFieldName{
+			PodHost: "DesiredState.Host",
+		},
+	},
+	"v1beta3": resourceTypeToFieldMapping{
+		"nodes": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "metadata.name",
+		},
+		"minions": clientFieldNameToAPIVersionFieldName{
+			ObjectNameField: "metadata.name",
+		},
+		"pods": clientFieldNameToAPIVersionFieldName{
+			PodHost: "spec.host",
+		},
+	},
+}
 
 // FieldsSelectorParam adds the given selector as a query parameter with the name paramName.
 func (r *Request) FieldsSelectorParam(s fields.Selector) *Request {
@@ -287,7 +336,14 @@ func (r *Request) FieldsSelectorParam(s fields.Selector) *Request {
 	if s.Empty() {
 		return r
 	}
-	return r.setParam(api.FieldSelectorQueryParam(r.apiVersion), s.String())
+	s2, err := s.Transform(func(field, value string) (newField, newValue string, err error) {
+		return fieldMappings.filterField(r.apiVersion, r.resource, field, value)
+	})
+	if err != nil {
+		r.err = err
+		return r
+	}
+	return r.setParam(api.FieldSelectorQueryParam(r.apiVersion), s2.String())
 }
 
 // LabelsSelectorParam adds the given selector as a query parameter

pkg/kubelet/config/apiserver.go

@@ -28,8 +28,8 @@ import (
 )
 
 // NewSourceApiserver creates a config source that watches and pulls from the apiserver.
-func NewSourceApiserver(client *client.Client, hostname string, updates chan<- interface{}) {
-	lw := cache.NewListWatchFromClient(client, "pods", api.NamespaceAll, fields.OneTermEqualSelector(getHostFieldLabel(client.APIVersion()), hostname))
+func NewSourceApiserver(c *client.Client, hostname string, updates chan<- interface{}) {
+	lw := cache.NewListWatchFromClient(c, "pods", api.NamespaceAll, fields.OneTermEqualSelector(client.PodHost, hostname))
 	newSourceApiserverFromLW(lw, updates)
 }
 

pkg/kubelet/kubelet.go

@@ -168,7 +168,7 @@ func NewMainKubelet(
 	if kubeClient != nil {
 		// TODO: cache.NewListWatchFromClient is limited as it takes a client implementation rather
 		// than an interface. There is no way to construct a list+watcher using resource name.
-		fieldSelector := fields.Set{"metadata.name": hostname}.AsSelector()
+		fieldSelector := fields.Set{client.ObjectNameField: hostname}.AsSelector()
 		listWatch := &cache.ListWatch{
 			ListFunc: func() (runtime.Object, error) {
 				// TODO: Use List() with fieldSelector when it is supported.

plugin/pkg/scheduler/factory/factory.go

@@ -208,7 +208,7 @@ func (f *ConfigFactory) CreateFromKeys(predicateKeys, priorityKeys util.StringSe
 // Returns a cache.ListWatch that finds all pods that need to be
 // scheduled.
 func (factory *ConfigFactory) createUnassignedPodLW() *cache.ListWatch {
-	return cache.NewListWatchFromClient(factory.Client, "pods", api.NamespaceAll, fields.Set{getHostFieldLabel(factory.Client.APIVersion()): ""}.AsSelector())
+	return cache.NewListWatchFromClient(factory.Client, "pods", api.NamespaceAll, fields.Set{client.PodHost: ""}.AsSelector())
 }
 
 func parseSelectorOrDie(s string) fields.Selector {
@@ -224,7 +224,7 @@ func parseSelectorOrDie(s string) fields.Selector {
 // TODO: return a ListerWatcher interface instead?
 func (factory *ConfigFactory) createAssignedPodLW() *cache.ListWatch {
 	return cache.NewListWatchFromClient(factory.Client, "pods", api.NamespaceAll,
-		parseSelectorOrDie(getHostFieldLabel(factory.Client.APIVersion())+"!="))
+		parseSelectorOrDie(client.PodHost+"!="))
 }
 
 // createMinionLW returns a cache.ListWatch that gets all changes to minions.
@@ -295,15 +295,6 @@ func (factory *ConfigFactory) makeDefaultErrorFunc(backoff *podBackoff, podQueue
 	}
 }
 
-func getHostFieldLabel(apiVersion string) string {
-	switch apiVersion {
-	case "v1beta1", "v1beta2":
-		return "DesiredState.Host"
-	default:
-		return "spec.host"
-	}
-}
-
 // nodeEnumerator allows a cache.Poller to enumerate items in an api.NodeList
 type nodeEnumerator struct {
 	*api.NodeList