func (c *RESTClient) request(verb string) *rest.Request {
config := rest.ContentConfig{
ContentType: runtime.ContentTypeJSON,
GroupVersion: ®istered.GroupOrDie(api.GroupName).GroupVersion,
NegotiatedSerializer: c.NegotiatedSerializer,
}
groupName := api.GroupName
if c.GroupName != "" {
groupName = c.GroupName
}
ns := c.NegotiatedSerializer
info, _ := runtime.SerializerInfoForMediaType(ns.SupportedMediaTypes(), runtime.ContentTypeJSON)
internalVersion := schema.GroupVersion{
Group: registered.GroupOrDie(groupName).GroupVersion.Group,
Version: runtime.APIVersionInternal,
}
internalVersion.Version = runtime.APIVersionInternal
serializers := rest.Serializers{
Encoder: ns.EncoderForVersion(info.Serializer, registered.GroupOrDie(api.GroupName).GroupVersion),
Decoder: ns.DecoderToVersion(info.Serializer, internalVersion),
}
if info.StreamSerializer != nil {
serializers.StreamingSerializer = info.StreamSerializer.Serializer
serializers.Framer = info.StreamSerializer.Framer
}
return rest.NewRequest(c, verb, &url.URL{Host: "localhost"}, "", config, serializers, nil, nil)
}
// SwaggerSchema retrieves and parses the swagger API schema the server supports.
func (d *DiscoveryClient) SwaggerSchema(version schema.GroupVersion) (*swagger.ApiDeclaration, error) {
if version.Empty() {
return nil, fmt.Errorf("groupVersion cannot be empty")
}
groupList, err := d.ServerGroups()
if err != nil {
return nil, err
}
groupVersions := metav1.ExtractGroupVersions(groupList)
// This check also takes care the case that kubectl is newer than the running endpoint
if stringDoesntExistIn(version.String(), groupVersions) {
return nil, fmt.Errorf("API version: %v is not supported by the server. Use one of: %v", version, groupVersions)
}
var path string
if len(d.LegacyPrefix) > 0 && version == v1.SchemeGroupVersion {
path = "/swaggerapi" + d.LegacyPrefix + "/" + version.Version
} else {
path = "/swaggerapi/apis/" + version.Group + "/" + version.Version
}
body, err := d.restClient.Get().AbsPath(path).Do().Raw()
if err != nil {
return nil, err
}
var schema swagger.ApiDeclaration
err = json.Unmarshal(body, &schema)
if err != nil {
return nil, fmt.Errorf("got '%s': %v", string(body), err)
}
return &schema, nil
}
// serverPreferredResources returns the supported resources with the version preferred by the
// server. If namespaced is true, only namespaced resources will be returned.
func (d *DiscoveryClient) serverPreferredResources(namespaced bool) ([]schema.GroupVersionResource, error) {
// retry in case the groups supported by the server change after ServerGroup() returns.
const maxRetries = 2
var failedGroups map[schema.GroupVersion]error
var results []schema.GroupVersionResource
var resources map[schema.GroupResource]string
RetrieveGroups:
for i := 0; i < maxRetries; i++ {
results = []schema.GroupVersionResource{}
resources = map[schema.GroupResource]string{}
failedGroups = make(map[schema.GroupVersion]error)
serverGroupList, err := d.ServerGroups()
if err != nil {
return results, err
}
for _, apiGroup := range serverGroupList.Groups {
versions := apiGroup.Versions
for _, version := range versions {
groupVersion := schema.GroupVersion{Group: apiGroup.Name, Version: version.Version}
apiResourceList, err := d.ServerResourcesForGroupVersion(version.GroupVersion)
if err != nil {
if i < maxRetries-1 {
continue RetrieveGroups
}
failedGroups[groupVersion] = err
continue
}
for _, apiResource := range apiResourceList.APIResources {
// ignore the root scoped resources if "namespaced" is true.
if namespaced && !apiResource.Namespaced {
continue
}
if strings.Contains(apiResource.Name, "/") {
continue
}
gvr := groupVersion.WithResource(apiResource.Name)
if _, ok := resources[gvr.GroupResource()]; ok {
if gvr.Version != apiGroup.PreferredVersion.Version {
continue
}
// remove previous entry, because it will be replaced with a preferred one
for i := range results {
if results[i].GroupResource() == gvr.GroupResource() {
results = append(results[:i], results[i+1:]...)
}
}
}
resources[gvr.GroupResource()] = gvr.Version
results = append(results, gvr)
}
}
}
if len(failedGroups) == 0 {
return results, nil
}
}
return results, &ErrGroupDiscoveryFailed{Groups: failedGroups}
}
// NegotiateVersion queries the server's supported api versions to find
// a version that both client and server support.
// - If no version is provided, try registered client versions in order of
// preference.
// - If version is provided and the server does not support it,
// return an error.
func NegotiateVersion(client DiscoveryInterface, requiredGV *schema.GroupVersion, clientRegisteredGVs []schema.GroupVersion) (*schema.GroupVersion, error) {
clientVersions := sets.String{}
for _, gv := range clientRegisteredGVs {
clientVersions.Insert(gv.String())
}
groups, err := client.ServerGroups()
if err != nil {
// This is almost always a connection error, and higher level code should treat this as a generic error,
// not a negotiation specific error.
return nil, err
}
versions := metav1.ExtractGroupVersions(groups)
serverVersions := sets.String{}
for _, v := range versions {
serverVersions.Insert(v)
}
// If version explicitly requested verify that both client and server support it.
// If server does not support warn, but try to negotiate a lower version.
if requiredGV != nil {
if !clientVersions.Has(requiredGV.String()) {
return nil, fmt.Errorf("client does not support API version %q; client supported API versions: %v", requiredGV, clientVersions)
}
// If the server supports no versions, then we should just use the preferredGV
// This can happen because discovery fails due to 403 Forbidden errors
if len(serverVersions) == 0 {
return requiredGV, nil
}
if serverVersions.Has(requiredGV.String()) {
return requiredGV, nil
}
// If we are using an explicit config version the server does not support, fail.
return nil, fmt.Errorf("server does not support API version %q", requiredGV)
}
for _, clientGV := range clientRegisteredGVs {
if serverVersions.Has(clientGV.String()) {
// Version was not explicitly requested in command config (--api-version).
// Ok to fall back to a supported version with a warning.
// TODO: caesarxuchao: enable the warning message when we have
// proper fix. Please refer to issue #14895.
// if len(version) != 0 {
// glog.Warningf("Server does not support API version '%s'. Falling back to '%s'.", version, clientVersion)
// }
t := clientGV
return &t, nil
}
}
// if we have no server versions and we have no required version, choose the first clientRegisteredVersion
if len(serverVersions) == 0 && len(clientRegisteredGVs) > 0 {
return &clientRegisteredGVs[0], nil
}
return nil, fmt.Errorf("failed to negotiate an api version; server supports: %v, client supports: %v",
serverVersions, clientVersions)
}
func (m PriorityRESTMapper) RESTMapping(gk schema.GroupKind, versions ...string) (mapping *RESTMapping, err error) {
mappings, err := m.Delegate.RESTMappings(gk)
if err != nil {
return nil, err
}
// any versions the user provides take priority
priorities := m.KindPriority
if len(versions) > 0 {
priorities = make([]schema.GroupVersionKind, 0, len(m.KindPriority)+len(versions))
for _, version := range versions {
gv := schema.GroupVersion{
Version: version,
Group: gk.Group,
}
priorities = append(priorities, gv.WithKind(AnyKind))
}
priorities = append(priorities, m.KindPriority...)
}
remaining := append([]*RESTMapping{}, mappings...)
for _, pattern := range priorities {
var matching []*RESTMapping
for _, m := range remaining {
if kindMatches(pattern, m.GroupVersionKind) {
matching = append(matching, m)
}
}
switch len(matching) {
case 0:
// if you have no matches, then nothing matched this pattern just move to the next
continue
case 1:
// one match, return
return matching[0], nil
default:
// more than one match, use the matched hits as the list moving to the next pattern.
// this way you can have a series of selection criteria
remaining = matching
}
}
if len(remaining) == 1 {
return remaining[0], nil
}
var kinds []schema.GroupVersionKind
for _, m := range mappings {
kinds = append(kinds, m.GroupVersionKind)
}
return nil, &AmbiguousKindError{PartialKind: gk.WithVersion(""), MatchingKinds: kinds}
}
// AddToGroupVersion registers the watch external and internal kinds with the scheme, and ensures the proper
// conversions are in place.
func AddToGroupVersion(scheme *runtime.Scheme, groupVersion schema.GroupVersion) {
scheme.AddKnownTypeWithName(groupVersion.WithKind(WatchEventKind), &Event{})
scheme.AddKnownTypeWithName(
schema.GroupVersion{Group: groupVersion.Group, Version: runtime.APIVersionInternal}.WithKind(WatchEventKind),
&InternalEvent{},
)
scheme.AddConversionFuncs(
Convert_versioned_Event_to_watch_Event,
Convert_versioned_InternalEvent_to_versioned_Event,
Convert_watch_Event_to_versioned_Event,
Convert_versioned_Event_to_versioned_InternalEvent,
)
}
// NewUnstructuredObjectTyper returns a runtime.ObjectTyper for
// unstructred objects based on discovery information.
func NewUnstructuredObjectTyper(groupResources []*APIGroupResources) *UnstructuredObjectTyper {
dot := &UnstructuredObjectTyper{registered: make(map[schema.GroupVersionKind]bool)}
for _, group := range groupResources {
for _, discoveryVersion := range group.Group.Versions {
resources, ok := group.VersionedResources[discoveryVersion.Version]
if !ok {
continue
}
gv := schema.GroupVersion{Group: group.Group.Name, Version: discoveryVersion.Version}
for _, resource := range resources {
dot.registered[gv.WithKind(resource.Kind)] = true
}
}
}
return dot
}
// DecodeParameters converts the provided url.Values into an object of type From with the kind of into, and then
// converts that object to into (if necessary). Returns an error if the operation cannot be completed.
func (c *parameterCodec) DecodeParameters(parameters url.Values, from schema.GroupVersion, into Object) error {
if len(parameters) == 0 {
return nil
}
targetGVKs, _, err := c.typer.ObjectKinds(into)
if err != nil {
return err
}
targetGVK := targetGVKs[0]
if targetGVK.GroupVersion() == from {
return c.convertor.Convert(¶meters, into, nil)
}
input, err := c.creator.New(from.WithKind(targetGVK.Kind))
if err != nil {
return err
}
if err := c.convertor.Convert(¶meters, input, nil); err != nil {
return err
}
return c.convertor.Convert(input, into, nil)
}
// NewRESTMapper returns a PriorityRESTMapper based on the discovered
// groups and resources passed in.
func NewRESTMapper(groupResources []*APIGroupResources, versionInterfaces meta.VersionInterfacesFunc) meta.RESTMapper {
unionMapper := meta.MultiRESTMapper{}
var groupPriority []string
var resourcePriority []schema.GroupVersionResource
var kindPriority []schema.GroupVersionKind
for _, group := range groupResources {
groupPriority = append(groupPriority, group.Group.Name)
if len(group.Group.PreferredVersion.Version) != 0 {
preferred := group.Group.PreferredVersion.Version
if _, ok := group.VersionedResources[preferred]; ok {
resourcePriority = append(resourcePriority, schema.GroupVersionResource{
Group: group.Group.Name,
Version: group.Group.PreferredVersion.Version,
Resource: meta.AnyResource,
})
kindPriority = append(kindPriority, schema.GroupVersionKind{
Group: group.Group.Name,
Version: group.Group.PreferredVersion.Version,
Kind: meta.AnyKind,
})
}
}
for _, discoveryVersion := range group.Group.Versions {
resources, ok := group.VersionedResources[discoveryVersion.Version]
if !ok {
continue
}
gv := schema.GroupVersion{Group: group.Group.Name, Version: discoveryVersion.Version}
versionMapper := meta.NewDefaultRESTMapper([]schema.GroupVersion{gv}, versionInterfaces)
for _, resource := range resources {
scope := meta.RESTScopeNamespace
if !resource.Namespaced {
scope = meta.RESTScopeRoot
}
versionMapper.Add(gv.WithKind(resource.Kind), scope)
// TODO only do this if it supports listing
versionMapper.Add(gv.WithKind(resource.Kind+"List"), scope)
}
// TODO why is this type not in discovery (at least for "v1")
versionMapper.Add(gv.WithKind("List"), meta.RESTScopeRoot)
unionMapper = append(unionMapper, versionMapper)
}
}
for _, group := range groupPriority {
resourcePriority = append(resourcePriority, schema.GroupVersionResource{
Group: group,
Version: meta.AnyVersion,
Resource: meta.AnyResource,
})
kindPriority = append(kindPriority, schema.GroupVersionKind{
Group: group,
Version: meta.AnyVersion,
Kind: meta.AnyKind,
})
}
return meta.PriorityRESTMapper{
Delegate: unionMapper,
ResourcePriority: resourcePriority,
KindPriority: kindPriority,
}
}