mirror of
https://github.com/kubernetes-sigs/prometheus-adapter.git
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a293b2bf94
Travis seems to be having issues pulling deps, so we'll have to check in the vendor directory and prevent the makefile from trying to regenerate it normally.
1064 lines
40 KiB
Go
1064 lines
40 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package endpoints
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import (
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"fmt"
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"net/http"
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gpath "path"
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"reflect"
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"sort"
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"strings"
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"time"
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"unicode"
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restful "github.com/emicklei/go-restful"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/conversion"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apiserver/pkg/admission"
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"k8s.io/apiserver/pkg/endpoints/handlers"
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"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
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"k8s.io/apiserver/pkg/endpoints/metrics"
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"k8s.io/apiserver/pkg/registry/rest"
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genericfilters "k8s.io/apiserver/pkg/server/filters"
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utilopenapi "k8s.io/apiserver/pkg/util/openapi"
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openapibuilder "k8s.io/kube-openapi/pkg/builder"
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)
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const (
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ROUTE_META_GVK = "x-kubernetes-group-version-kind"
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ROUTE_META_ACTION = "x-kubernetes-action"
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)
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type APIInstaller struct {
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group *APIGroupVersion
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prefix string // Path prefix where API resources are to be registered.
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minRequestTimeout time.Duration
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enableAPIResponseCompression bool
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}
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// Struct capturing information about an action ("GET", "POST", "WATCH", "PROXY", etc).
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type action struct {
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Verb string // Verb identifying the action ("GET", "POST", "WATCH", "PROXY", etc).
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Path string // The path of the action
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Params []*restful.Parameter // List of parameters associated with the action.
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Namer handlers.ScopeNamer
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AllNamespaces bool // true iff the action is namespaced but works on aggregate result for all namespaces
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}
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// An interface to see if one storage supports override its default verb for monitoring
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type StorageMetricsOverride interface {
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// OverrideMetricsVerb gives a storage object an opportunity to override the verb reported to the metrics endpoint
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OverrideMetricsVerb(oldVerb string) (newVerb string)
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}
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// An interface to see if an object supports swagger documentation as a method
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type documentable interface {
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SwaggerDoc() map[string]string
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}
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// toDiscoveryKubeVerb maps an action.Verb to the logical kube verb, used for discovery
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var toDiscoveryKubeVerb = map[string]string{
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"CONNECT": "", // do not list in discovery.
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"DELETE": "delete",
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"DELETECOLLECTION": "deletecollection",
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"GET": "get",
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"LIST": "list",
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"PATCH": "patch",
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"POST": "create",
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"PROXY": "proxy",
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"PUT": "update",
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"WATCH": "watch",
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"WATCHLIST": "watch",
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}
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// Install handlers for API resources.
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func (a *APIInstaller) Install() ([]metav1.APIResource, *restful.WebService, []error) {
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var apiResources []metav1.APIResource
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var errors []error
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ws := a.newWebService()
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// Register the paths in a deterministic (sorted) order to get a deterministic swagger spec.
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paths := make([]string, len(a.group.Storage))
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var i int = 0
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for path := range a.group.Storage {
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paths[i] = path
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i++
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}
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sort.Strings(paths)
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for _, path := range paths {
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apiResource, err := a.registerResourceHandlers(path, a.group.Storage[path], ws)
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if err != nil {
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errors = append(errors, fmt.Errorf("error in registering resource: %s, %v", path, err))
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}
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if apiResource != nil {
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apiResources = append(apiResources, *apiResource)
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}
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}
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return apiResources, ws, errors
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}
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// newWebService creates a new restful webservice with the api installer's prefix and version.
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func (a *APIInstaller) newWebService() *restful.WebService {
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ws := new(restful.WebService)
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ws.Path(a.prefix)
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// a.prefix contains "prefix/group/version"
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ws.Doc("API at " + a.prefix)
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// Backwards compatibility, we accepted objects with empty content-type at V1.
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// If we stop using go-restful, we can default empty content-type to application/json on an
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// endpoint by endpoint basis
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ws.Consumes("*/*")
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mediaTypes, streamMediaTypes := negotiation.MediaTypesForSerializer(a.group.Serializer)
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ws.Produces(append(mediaTypes, streamMediaTypes...)...)
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ws.ApiVersion(a.group.GroupVersion.String())
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return ws
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}
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// getResourceKind returns the external group version kind registered for the given storage
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// object. If the storage object is a subresource and has an override supplied for it, it returns
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// the group version kind supplied in the override.
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func (a *APIInstaller) getResourceKind(path string, storage rest.Storage) (schema.GroupVersionKind, error) {
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// Let the storage tell us exactly what GVK it has
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if gvkProvider, ok := storage.(rest.GroupVersionKindProvider); ok {
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return gvkProvider.GroupVersionKind(a.group.GroupVersion), nil
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}
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object := storage.New()
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fqKinds, _, err := a.group.Typer.ObjectKinds(object)
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if err != nil {
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return schema.GroupVersionKind{}, err
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}
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// a given go type can have multiple potential fully qualified kinds. Find the one that corresponds with the group
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// we're trying to register here
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fqKindToRegister := schema.GroupVersionKind{}
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for _, fqKind := range fqKinds {
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if fqKind.Group == a.group.GroupVersion.Group {
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fqKindToRegister = a.group.GroupVersion.WithKind(fqKind.Kind)
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break
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}
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}
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if fqKindToRegister.Empty() {
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return schema.GroupVersionKind{}, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
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}
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// group is guaranteed to match based on the check above
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return fqKindToRegister, nil
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}
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func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService) (*metav1.APIResource, error) {
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admit := a.group.Admit
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optionsExternalVersion := a.group.GroupVersion
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if a.group.OptionsExternalVersion != nil {
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optionsExternalVersion = *a.group.OptionsExternalVersion
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}
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resource, subresource, err := splitSubresource(path)
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if err != nil {
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return nil, err
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}
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fqKindToRegister, err := a.getResourceKind(path, storage)
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if err != nil {
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return nil, err
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}
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versionedPtr, err := a.group.Creater.New(fqKindToRegister)
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if err != nil {
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return nil, err
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}
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defaultVersionedObject := indirectArbitraryPointer(versionedPtr)
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kind := fqKindToRegister.Kind
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isSubresource := len(subresource) > 0
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// If there is a subresource, namespace scoping is defined by the parent resource
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namespaceScoped := true
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if isSubresource {
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parentStorage, ok := a.group.Storage[resource]
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if !ok {
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return nil, fmt.Errorf("missing parent storage: %q", resource)
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}
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scoper, ok := parentStorage.(rest.Scoper)
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if !ok {
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return nil, fmt.Errorf("%q must implement scoper", resource)
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}
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namespaceScoped = scoper.NamespaceScoped()
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} else {
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scoper, ok := storage.(rest.Scoper)
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if !ok {
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return nil, fmt.Errorf("%q must implement scoper", resource)
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}
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namespaceScoped = scoper.NamespaceScoped()
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}
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// what verbs are supported by the storage, used to know what verbs we support per path
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creater, isCreater := storage.(rest.Creater)
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namedCreater, isNamedCreater := storage.(rest.NamedCreater)
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lister, isLister := storage.(rest.Lister)
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getter, isGetter := storage.(rest.Getter)
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getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
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gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
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collectionDeleter, isCollectionDeleter := storage.(rest.CollectionDeleter)
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updater, isUpdater := storage.(rest.Updater)
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patcher, isPatcher := storage.(rest.Patcher)
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watcher, isWatcher := storage.(rest.Watcher)
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connecter, isConnecter := storage.(rest.Connecter)
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storageMeta, isMetadata := storage.(rest.StorageMetadata)
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if !isMetadata {
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storageMeta = defaultStorageMetadata{}
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}
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exporter, isExporter := storage.(rest.Exporter)
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if !isExporter {
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exporter = nil
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}
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versionedExportOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ExportOptions"))
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if err != nil {
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return nil, err
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}
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if isNamedCreater {
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isCreater = true
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}
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var versionedList interface{}
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if isLister {
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list := lister.NewList()
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listGVKs, _, err := a.group.Typer.ObjectKinds(list)
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if err != nil {
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return nil, err
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}
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versionedListPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(listGVKs[0].Kind))
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if err != nil {
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return nil, err
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}
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versionedList = indirectArbitraryPointer(versionedListPtr)
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}
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versionedListOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ListOptions"))
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if err != nil {
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return nil, err
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}
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var versionedDeleteOptions runtime.Object
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var versionedDeleterObject interface{}
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if isGracefulDeleter {
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versionedDeleteOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind("DeleteOptions"))
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if err != nil {
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return nil, err
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}
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versionedDeleterObject = indirectArbitraryPointer(versionedDeleteOptions)
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}
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versionedStatusPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("Status"))
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if err != nil {
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return nil, err
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}
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versionedStatus := indirectArbitraryPointer(versionedStatusPtr)
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var (
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getOptions runtime.Object
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versionedGetOptions runtime.Object
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getOptionsInternalKind schema.GroupVersionKind
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getSubpath bool
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)
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if isGetterWithOptions {
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getOptions, getSubpath, _ = getterWithOptions.NewGetOptions()
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getOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(getOptions)
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if err != nil {
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return nil, err
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}
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getOptionsInternalKind = getOptionsInternalKinds[0]
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versionedGetOptions, err = a.group.Creater.New(a.group.GroupVersion.WithKind(getOptionsInternalKind.Kind))
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if err != nil {
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versionedGetOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(getOptionsInternalKind.Kind))
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if err != nil {
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return nil, err
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}
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}
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isGetter = true
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}
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var versionedWatchEvent interface{}
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if isWatcher {
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versionedWatchEventPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind("WatchEvent"))
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if err != nil {
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return nil, err
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}
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versionedWatchEvent = indirectArbitraryPointer(versionedWatchEventPtr)
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}
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var (
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connectOptions runtime.Object
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versionedConnectOptions runtime.Object
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connectOptionsInternalKind schema.GroupVersionKind
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connectSubpath bool
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)
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if isConnecter {
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connectOptions, connectSubpath, _ = connecter.NewConnectOptions()
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if connectOptions != nil {
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connectOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(connectOptions)
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if err != nil {
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return nil, err
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}
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connectOptionsInternalKind = connectOptionsInternalKinds[0]
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versionedConnectOptions, err = a.group.Creater.New(a.group.GroupVersion.WithKind(connectOptionsInternalKind.Kind))
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if err != nil {
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versionedConnectOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(connectOptionsInternalKind.Kind))
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if err != nil {
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return nil, err
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}
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}
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}
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}
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allowWatchList := isWatcher && isLister // watching on lists is allowed only for kinds that support both watch and list.
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nameParam := ws.PathParameter("name", "name of the "+kind).DataType("string")
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pathParam := ws.PathParameter("path", "path to the resource").DataType("string")
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params := []*restful.Parameter{}
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actions := []action{}
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var resourceKind string
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kindProvider, ok := storage.(rest.KindProvider)
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if ok {
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resourceKind = kindProvider.Kind()
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} else {
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resourceKind = kind
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}
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tableProvider, _ := storage.(rest.TableConvertor)
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var apiResource metav1.APIResource
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// Get the list of actions for the given scope.
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switch {
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case !namespaceScoped:
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// Handle non-namespace scoped resources like nodes.
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resourcePath := resource
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resourceParams := params
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itemPath := resourcePath + "/{name}"
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nameParams := append(params, nameParam)
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proxyParams := append(nameParams, pathParam)
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suffix := ""
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if isSubresource {
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suffix = "/" + subresource
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itemPath = itemPath + suffix
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resourcePath = itemPath
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resourceParams = nameParams
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}
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apiResource.Name = path
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apiResource.Namespaced = false
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apiResource.Kind = resourceKind
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namer := handlers.ContextBasedNaming{
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SelfLinker: a.group.Linker,
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ClusterScoped: true,
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SelfLinkPathPrefix: gpath.Join(a.prefix, resource) + "/",
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SelfLinkPathSuffix: suffix,
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}
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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// Add actions at the resource path: /api/apiVersion/resource
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer, false}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer, false}, isCreater)
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actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer, false}, isCollectionDeleter)
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// DEPRECATED
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer, false}, allowWatchList)
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// Add actions at the item path: /api/apiVersion/resource/{name}
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer, false}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer, false}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer, false}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer, false}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer, false}, isGracefulDeleter)
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer, false}, isWatcher)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer, false}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer, false}, isConnecter && connectSubpath)
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break
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default:
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namespaceParamName := "namespaces"
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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namespaceParam := ws.PathParameter("namespace", "object name and auth scope, such as for teams and projects").DataType("string")
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namespacedPath := namespaceParamName + "/{" + "namespace" + "}/" + resource
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namespaceParams := []*restful.Parameter{namespaceParam}
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resourcePath := namespacedPath
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resourceParams := namespaceParams
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itemPath := namespacedPath + "/{name}"
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nameParams := append(namespaceParams, nameParam)
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proxyParams := append(nameParams, pathParam)
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itemPathSuffix := ""
|
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if isSubresource {
|
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itemPathSuffix = "/" + subresource
|
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itemPath = itemPath + itemPathSuffix
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resourcePath = itemPath
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resourceParams = nameParams
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}
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apiResource.Name = path
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apiResource.Namespaced = true
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apiResource.Kind = resourceKind
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namer := handlers.ContextBasedNaming{
|
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SelfLinker: a.group.Linker,
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ClusterScoped: false,
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SelfLinkPathPrefix: gpath.Join(a.prefix, namespaceParamName) + "/",
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SelfLinkPathSuffix: itemPathSuffix,
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}
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer, false}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer, false}, isCreater)
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actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer, false}, isCollectionDeleter)
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// DEPRECATED
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer, false}, allowWatchList)
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|
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer, false}, isGetter)
|
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if getSubpath {
|
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer, false}, isGetter)
|
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}
|
|
actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer, false}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer, false}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer, false}, isGracefulDeleter)
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer, false}, isWatcher)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer, false}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer, false}, isConnecter && connectSubpath)
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|
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// list or post across namespace.
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// For ex: LIST all pods in all namespaces by sending a LIST request at /api/apiVersion/pods.
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// TODO: more strongly type whether a resource allows these actions on "all namespaces" (bulk delete)
|
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if !isSubresource {
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actions = appendIf(actions, action{"LIST", resource, params, namer, true}, isLister)
|
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resource, params, namer, true}, allowWatchList)
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}
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break
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}
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|
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// Create Routes for the actions.
|
|
// TODO: Add status documentation using Returns()
|
|
// Errors (see api/errors/errors.go as well as go-restful router):
|
|
// http.StatusNotFound, http.StatusMethodNotAllowed,
|
|
// http.StatusUnsupportedMediaType, http.StatusNotAcceptable,
|
|
// http.StatusBadRequest, http.StatusUnauthorized, http.StatusForbidden,
|
|
// http.StatusRequestTimeout, http.StatusConflict, http.StatusPreconditionFailed,
|
|
// http.StatusUnprocessableEntity, http.StatusInternalServerError,
|
|
// http.StatusServiceUnavailable
|
|
// and api error codes
|
|
// Note that if we specify a versioned Status object here, we may need to
|
|
// create one for the tests, also
|
|
// Success:
|
|
// http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent
|
|
//
|
|
// test/integration/auth_test.go is currently the most comprehensive status code test
|
|
|
|
mediaTypes, streamMediaTypes := negotiation.MediaTypesForSerializer(a.group.Serializer)
|
|
allMediaTypes := append(mediaTypes, streamMediaTypes...)
|
|
ws.Produces(allMediaTypes...)
|
|
|
|
kubeVerbs := map[string]struct{}{}
|
|
reqScope := handlers.RequestScope{
|
|
Serializer: a.group.Serializer,
|
|
ParameterCodec: a.group.ParameterCodec,
|
|
Creater: a.group.Creater,
|
|
Convertor: a.group.Convertor,
|
|
Defaulter: a.group.Defaulter,
|
|
Typer: a.group.Typer,
|
|
UnsafeConvertor: a.group.UnsafeConvertor,
|
|
|
|
// TODO: Check for the interface on storage
|
|
TableConvertor: tableProvider,
|
|
|
|
// TODO: This seems wrong for cross-group subresources. It makes an assumption that a subresource and its parent are in the same group version. Revisit this.
|
|
Resource: a.group.GroupVersion.WithResource(resource),
|
|
Subresource: subresource,
|
|
Kind: fqKindToRegister,
|
|
|
|
MetaGroupVersion: metav1.SchemeGroupVersion,
|
|
}
|
|
if a.group.MetaGroupVersion != nil {
|
|
reqScope.MetaGroupVersion = *a.group.MetaGroupVersion
|
|
}
|
|
if a.group.OpenAPIConfig != nil {
|
|
openAPIDefinitions, err := openapibuilder.BuildOpenAPIDefinitionsForResource(defaultVersionedObject, a.group.OpenAPIConfig)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to build openapi definitions for %v: %v", fqKindToRegister, err)
|
|
}
|
|
reqScope.OpenAPISchema, err = utilopenapi.ToProtoSchema(openAPIDefinitions, fqKindToRegister)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("unable to get openapi schema for %v: %v", fqKindToRegister, err)
|
|
}
|
|
}
|
|
for _, action := range actions {
|
|
producedObject := storageMeta.ProducesObject(action.Verb)
|
|
if producedObject == nil {
|
|
producedObject = defaultVersionedObject
|
|
}
|
|
reqScope.Namer = action.Namer
|
|
|
|
requestScope := "cluster"
|
|
var namespaced string
|
|
var operationSuffix string
|
|
if apiResource.Namespaced {
|
|
requestScope = "namespace"
|
|
namespaced = "Namespaced"
|
|
}
|
|
if strings.HasSuffix(action.Path, "/{path:*}") {
|
|
requestScope = "resource"
|
|
operationSuffix = operationSuffix + "WithPath"
|
|
}
|
|
if action.AllNamespaces {
|
|
requestScope = "cluster"
|
|
operationSuffix = operationSuffix + "ForAllNamespaces"
|
|
namespaced = ""
|
|
}
|
|
|
|
if kubeVerb, found := toDiscoveryKubeVerb[action.Verb]; found {
|
|
if len(kubeVerb) != 0 {
|
|
kubeVerbs[kubeVerb] = struct{}{}
|
|
}
|
|
} else {
|
|
return nil, fmt.Errorf("unknown action verb for discovery: %s", action.Verb)
|
|
}
|
|
|
|
routes := []*restful.RouteBuilder{}
|
|
|
|
// If there is a subresource, kind should be the parent's kind.
|
|
if isSubresource {
|
|
parentStorage, ok := a.group.Storage[resource]
|
|
if !ok {
|
|
return nil, fmt.Errorf("missing parent storage: %q", resource)
|
|
}
|
|
|
|
fqParentKind, err := a.getResourceKind(resource, parentStorage)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
kind = fqParentKind.Kind
|
|
}
|
|
|
|
verbOverrider, needOverride := storage.(StorageMetricsOverride)
|
|
|
|
switch action.Verb {
|
|
case "GET": // Get a resource.
|
|
var handler restful.RouteFunction
|
|
if isGetterWithOptions {
|
|
handler = restfulGetResourceWithOptions(getterWithOptions, reqScope, isSubresource)
|
|
} else {
|
|
handler = restfulGetResource(getter, exporter, reqScope)
|
|
}
|
|
|
|
if needOverride {
|
|
// need change the reported verb
|
|
handler = metrics.InstrumentRouteFunc(verbOverrider.OverrideMetricsVerb(action.Verb), resource, subresource, requestScope, handler)
|
|
} else {
|
|
handler = metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, handler)
|
|
}
|
|
|
|
if a.enableAPIResponseCompression {
|
|
handler = genericfilters.RestfulWithCompression(handler)
|
|
}
|
|
doc := "read the specified " + kind
|
|
if isSubresource {
|
|
doc = "read " + subresource + " of the specified " + kind
|
|
}
|
|
route := ws.GET(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("read"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
Writes(producedObject)
|
|
if isGetterWithOptions {
|
|
if err := addObjectParams(ws, route, versionedGetOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
if isExporter {
|
|
if err := addObjectParams(ws, route, versionedExportOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "LIST": // List all resources of a kind.
|
|
doc := "list objects of kind " + kind
|
|
if isSubresource {
|
|
doc = "list " + subresource + " of objects of kind " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulListResource(lister, watcher, reqScope, false, a.minRequestTimeout))
|
|
if a.enableAPIResponseCompression {
|
|
handler = genericfilters.RestfulWithCompression(handler)
|
|
}
|
|
route := ws.GET(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("list"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), allMediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", versionedList).
|
|
Writes(versionedList)
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
switch {
|
|
case isLister && isWatcher:
|
|
doc := "list or watch objects of kind " + kind
|
|
if isSubresource {
|
|
doc = "list or watch " + subresource + " of objects of kind " + kind
|
|
}
|
|
route.Doc(doc)
|
|
case isWatcher:
|
|
doc := "watch objects of kind " + kind
|
|
if isSubresource {
|
|
doc = "watch " + subresource + "of objects of kind " + kind
|
|
}
|
|
route.Doc(doc)
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "PUT": // Update a resource.
|
|
doc := "replace the specified " + kind
|
|
if isSubresource {
|
|
doc = "replace " + subresource + " of the specified " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulUpdateResource(updater, reqScope, admit))
|
|
route := ws.PUT(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("replace"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
// TODO: in some cases, the API may return a v1.Status instead of the versioned object
|
|
// but currently go-restful can't handle multiple different objects being returned.
|
|
Returns(http.StatusCreated, "Created", producedObject).
|
|
Reads(defaultVersionedObject).
|
|
Writes(producedObject)
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "PATCH": // Partially update a resource
|
|
doc := "partially update the specified " + kind
|
|
if isSubresource {
|
|
doc = "partially update " + subresource + " of the specified " + kind
|
|
}
|
|
supportedTypes := []string{
|
|
string(types.JSONPatchType),
|
|
string(types.MergePatchType),
|
|
string(types.StrategicMergePatchType),
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulPatchResource(patcher, reqScope, admit, supportedTypes))
|
|
route := ws.PATCH(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Consumes(string(types.JSONPatchType), string(types.MergePatchType), string(types.StrategicMergePatchType)).
|
|
Operation("patch"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
Reads(metav1.Patch{}).
|
|
Writes(producedObject)
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "POST": // Create a resource.
|
|
var handler restful.RouteFunction
|
|
if isNamedCreater {
|
|
handler = restfulCreateNamedResource(namedCreater, reqScope, admit)
|
|
} else {
|
|
handler = restfulCreateResource(creater, reqScope, admit)
|
|
}
|
|
handler = metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, handler)
|
|
article := getArticleForNoun(kind, " ")
|
|
doc := "create" + article + kind
|
|
if isSubresource {
|
|
doc = "create " + subresource + " of" + article + kind
|
|
}
|
|
route := ws.POST(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("create"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
// TODO: in some cases, the API may return a v1.Status instead of the versioned object
|
|
// but currently go-restful can't handle multiple different objects being returned.
|
|
Returns(http.StatusCreated, "Created", producedObject).
|
|
Returns(http.StatusAccepted, "Accepted", producedObject).
|
|
Reads(defaultVersionedObject).
|
|
Writes(producedObject)
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "DELETE": // Delete a resource.
|
|
article := getArticleForNoun(kind, " ")
|
|
doc := "delete" + article + kind
|
|
if isSubresource {
|
|
doc = "delete " + subresource + " of" + article + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulDeleteResource(gracefulDeleter, isGracefulDeleter, reqScope, admit))
|
|
route := ws.DELETE(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("delete"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Writes(versionedStatus).
|
|
Returns(http.StatusOK, "OK", versionedStatus)
|
|
if isGracefulDeleter {
|
|
route.Reads(versionedDeleterObject)
|
|
if err := addObjectParams(ws, route, versionedDeleteOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "DELETECOLLECTION":
|
|
doc := "delete collection of " + kind
|
|
if isSubresource {
|
|
doc = "delete collection of " + subresource + " of a " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulDeleteCollection(collectionDeleter, isCollectionDeleter, reqScope, admit))
|
|
route := ws.DELETE(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("deletecollection"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Writes(versionedStatus).
|
|
Returns(http.StatusOK, "OK", versionedStatus)
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
// TODO: deprecated
|
|
case "WATCH": // Watch a resource.
|
|
doc := "watch changes to an object of kind " + kind
|
|
if isSubresource {
|
|
doc = "watch changes to " + subresource + " of an object of kind " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
|
|
route := ws.GET(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("watch"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(allMediaTypes...).
|
|
Returns(http.StatusOK, "OK", versionedWatchEvent).
|
|
Writes(versionedWatchEvent)
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
// TODO: deprecated
|
|
case "WATCHLIST": // Watch all resources of a kind.
|
|
doc := "watch individual changes to a list of " + kind
|
|
if isSubresource {
|
|
doc = "watch individual changes to a list of " + subresource + " of " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
|
|
route := ws.GET(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Operation("watch"+namespaced+kind+strings.Title(subresource)+"List"+operationSuffix).
|
|
Produces(allMediaTypes...).
|
|
Returns(http.StatusOK, "OK", versionedWatchEvent).
|
|
Writes(versionedWatchEvent)
|
|
if err := addObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "CONNECT":
|
|
for _, method := range connecter.ConnectMethods() {
|
|
connectProducedObject := storageMeta.ProducesObject(method)
|
|
if connectProducedObject == nil {
|
|
connectProducedObject = "string"
|
|
}
|
|
doc := "connect " + method + " requests to " + kind
|
|
if isSubresource {
|
|
doc = "connect " + method + " requests to " + subresource + " of " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, resource, subresource, requestScope, restfulConnectResource(connecter, reqScope, admit, path, isSubresource))
|
|
route := ws.Method(method).Path(action.Path).
|
|
To(handler).
|
|
Doc(doc).
|
|
Operation("connect" + strings.Title(strings.ToLower(method)) + namespaced + kind + strings.Title(subresource) + operationSuffix).
|
|
Produces("*/*").
|
|
Consumes("*/*").
|
|
Writes(connectProducedObject)
|
|
if versionedConnectOptions != nil {
|
|
if err := addObjectParams(ws, route, versionedConnectOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("unrecognized action verb: %s", action.Verb)
|
|
}
|
|
for _, route := range routes {
|
|
route.Metadata(ROUTE_META_GVK, metav1.GroupVersionKind{
|
|
Group: reqScope.Kind.Group,
|
|
Version: reqScope.Kind.Version,
|
|
Kind: reqScope.Kind.Kind,
|
|
})
|
|
route.Metadata(ROUTE_META_ACTION, strings.ToLower(action.Verb))
|
|
ws.Route(route)
|
|
}
|
|
// Note: update GetAuthorizerAttributes() when adding a custom handler.
|
|
}
|
|
|
|
apiResource.Verbs = make([]string, 0, len(kubeVerbs))
|
|
for kubeVerb := range kubeVerbs {
|
|
apiResource.Verbs = append(apiResource.Verbs, kubeVerb)
|
|
}
|
|
sort.Strings(apiResource.Verbs)
|
|
|
|
if shortNamesProvider, ok := storage.(rest.ShortNamesProvider); ok {
|
|
apiResource.ShortNames = shortNamesProvider.ShortNames()
|
|
}
|
|
if categoriesProvider, ok := storage.(rest.CategoriesProvider); ok {
|
|
apiResource.Categories = categoriesProvider.Categories()
|
|
}
|
|
if gvkProvider, ok := storage.(rest.GroupVersionKindProvider); ok {
|
|
gvk := gvkProvider.GroupVersionKind(a.group.GroupVersion)
|
|
apiResource.Group = gvk.Group
|
|
apiResource.Version = gvk.Version
|
|
apiResource.Kind = gvk.Kind
|
|
}
|
|
|
|
return &apiResource, nil
|
|
}
|
|
|
|
// indirectArbitraryPointer returns *ptrToObject for an arbitrary pointer
|
|
func indirectArbitraryPointer(ptrToObject interface{}) interface{} {
|
|
return reflect.Indirect(reflect.ValueOf(ptrToObject)).Interface()
|
|
}
|
|
|
|
func appendIf(actions []action, a action, shouldAppend bool) []action {
|
|
if shouldAppend {
|
|
actions = append(actions, a)
|
|
}
|
|
return actions
|
|
}
|
|
|
|
// Wraps a http.Handler function inside a restful.RouteFunction
|
|
func routeFunction(handler http.Handler) restful.RouteFunction {
|
|
return func(restReq *restful.Request, restResp *restful.Response) {
|
|
handler.ServeHTTP(restResp.ResponseWriter, restReq.Request)
|
|
}
|
|
}
|
|
|
|
func addParams(route *restful.RouteBuilder, params []*restful.Parameter) {
|
|
for _, param := range params {
|
|
route.Param(param)
|
|
}
|
|
}
|
|
|
|
// addObjectParams converts a runtime.Object into a set of go-restful Param() definitions on the route.
|
|
// The object must be a pointer to a struct; only fields at the top level of the struct that are not
|
|
// themselves interfaces or structs are used; only fields with a json tag that is non empty (the standard
|
|
// Go JSON behavior for omitting a field) become query parameters. The name of the query parameter is
|
|
// the JSON field name. If a description struct tag is set on the field, that description is used on the
|
|
// query parameter. In essence, it converts a standard JSON top level object into a query param schema.
|
|
func addObjectParams(ws *restful.WebService, route *restful.RouteBuilder, obj interface{}) error {
|
|
sv, err := conversion.EnforcePtr(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
st := sv.Type()
|
|
switch st.Kind() {
|
|
case reflect.Struct:
|
|
for i := 0; i < st.NumField(); i++ {
|
|
name := st.Field(i).Name
|
|
sf, ok := st.FieldByName(name)
|
|
if !ok {
|
|
continue
|
|
}
|
|
switch sf.Type.Kind() {
|
|
case reflect.Interface, reflect.Struct:
|
|
case reflect.Ptr:
|
|
// TODO: This is a hack to let metav1.Time through. This needs to be fixed in a more generic way eventually. bug #36191
|
|
if (sf.Type.Elem().Kind() == reflect.Interface || sf.Type.Elem().Kind() == reflect.Struct) && strings.TrimPrefix(sf.Type.String(), "*") != "metav1.Time" {
|
|
continue
|
|
}
|
|
fallthrough
|
|
default:
|
|
jsonTag := sf.Tag.Get("json")
|
|
if len(jsonTag) == 0 {
|
|
continue
|
|
}
|
|
jsonName := strings.SplitN(jsonTag, ",", 2)[0]
|
|
if len(jsonName) == 0 {
|
|
continue
|
|
}
|
|
|
|
var desc string
|
|
if docable, ok := obj.(documentable); ok {
|
|
desc = docable.SwaggerDoc()[jsonName]
|
|
}
|
|
route.Param(ws.QueryParameter(jsonName, desc).DataType(typeToJSON(sf.Type.String())))
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// TODO: this is incomplete, expand as needed.
|
|
// Convert the name of a golang type to the name of a JSON type
|
|
func typeToJSON(typeName string) string {
|
|
switch typeName {
|
|
case "bool", "*bool":
|
|
return "boolean"
|
|
case "uint8", "*uint8", "int", "*int", "int32", "*int32", "int64", "*int64", "uint32", "*uint32", "uint64", "*uint64":
|
|
return "integer"
|
|
case "float64", "*float64", "float32", "*float32":
|
|
return "number"
|
|
case "metav1.Time", "*metav1.Time":
|
|
return "string"
|
|
case "byte", "*byte":
|
|
return "string"
|
|
case "v1.DeletionPropagation", "*v1.DeletionPropagation":
|
|
return "string"
|
|
|
|
// TODO: Fix these when go-restful supports a way to specify an array query param:
|
|
// https://github.com/emicklei/go-restful/issues/225
|
|
case "[]string", "[]*string":
|
|
return "string"
|
|
case "[]int32", "[]*int32":
|
|
return "integer"
|
|
|
|
default:
|
|
return typeName
|
|
}
|
|
}
|
|
|
|
// defaultStorageMetadata provides default answers to rest.StorageMetadata.
|
|
type defaultStorageMetadata struct{}
|
|
|
|
// defaultStorageMetadata implements rest.StorageMetadata
|
|
var _ rest.StorageMetadata = defaultStorageMetadata{}
|
|
|
|
func (defaultStorageMetadata) ProducesMIMETypes(verb string) []string {
|
|
return nil
|
|
}
|
|
|
|
func (defaultStorageMetadata) ProducesObject(verb string) interface{} {
|
|
return nil
|
|
}
|
|
|
|
// splitSubresource checks if the given storage path is the path of a subresource and returns
|
|
// the resource and subresource components.
|
|
func splitSubresource(path string) (string, string, error) {
|
|
var resource, subresource string
|
|
switch parts := strings.Split(path, "/"); len(parts) {
|
|
case 2:
|
|
resource, subresource = parts[0], parts[1]
|
|
case 1:
|
|
resource = parts[0]
|
|
default:
|
|
// TODO: support deeper paths
|
|
return "", "", fmt.Errorf("api_installer allows only one or two segment paths (resource or resource/subresource)")
|
|
}
|
|
return resource, subresource, nil
|
|
}
|
|
|
|
// getArticleForNoun returns the article needed for the given noun.
|
|
func getArticleForNoun(noun string, padding string) string {
|
|
if noun[len(noun)-2:] != "ss" && noun[len(noun)-1:] == "s" {
|
|
// Plurals don't have an article.
|
|
// Don't catch words like class
|
|
return fmt.Sprintf("%v", padding)
|
|
}
|
|
|
|
article := "a"
|
|
if isVowel(rune(noun[0])) {
|
|
article = "an"
|
|
}
|
|
|
|
return fmt.Sprintf("%s%s%s", padding, article, padding)
|
|
}
|
|
|
|
// isVowel returns true if the rune is a vowel (case insensitive).
|
|
func isVowel(c rune) bool {
|
|
vowels := []rune{'a', 'e', 'i', 'o', 'u'}
|
|
for _, value := range vowels {
|
|
if value == unicode.ToLower(c) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func restfulListResource(r rest.Lister, rw rest.Watcher, scope handlers.RequestScope, forceWatch bool, minRequestTimeout time.Duration) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.ListResource(r, rw, scope, forceWatch, minRequestTimeout)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulCreateNamedResource(r rest.NamedCreater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.CreateNamedResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulCreateResource(r rest.Creater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.CreateResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulDeleteResource(r rest.GracefulDeleter, allowsOptions bool, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.DeleteResource(r, allowsOptions, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulDeleteCollection(r rest.CollectionDeleter, checkBody bool, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.DeleteCollection(r, checkBody, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulUpdateResource(r rest.Updater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.UpdateResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulPatchResource(r rest.Patcher, scope handlers.RequestScope, admit admission.Interface, supportedTypes []string) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.PatchResource(r, scope, admit, supportedTypes)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulGetResource(r rest.Getter, e rest.Exporter, scope handlers.RequestScope) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.GetResource(r, e, scope)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulGetResourceWithOptions(r rest.GetterWithOptions, scope handlers.RequestScope, isSubresource bool) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.GetResourceWithOptions(r, scope, isSubresource)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulConnectResource(connecter rest.Connecter, scope handlers.RequestScope, admit admission.Interface, restPath string, isSubresource bool) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.ConnectResource(connecter, scope, admit, restPath, isSubresource)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|