git subrepo clone (merge) https://github.com/kubernetes-incubator/metrics-server.git metrics-server
subrepo:
subdir: "metrics-server"
merged: "92d8412"
upstream:
origin: "https://github.com/kubernetes-incubator/metrics-server.git"
branch: "master"
commit: "92d8412"
git-subrepo:
version: "0.4.0"
origin: "???"
commit: "???"
diff --git a/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/root.go b/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/root.go
new file mode 100644
index 0000000..7ed64a9
--- /dev/null
+++ b/metrics-server/vendor/k8s.io/apiserver/pkg/endpoints/discovery/root.go
@@ -0,0 +1,135 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package discovery
+
+import (
+ "net/http"
+ "sync"
+
+ restful "github.com/emicklei/go-restful"
+
+ metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+ "k8s.io/apimachinery/pkg/runtime"
+ "k8s.io/apimachinery/pkg/runtime/schema"
+ utilnet "k8s.io/apimachinery/pkg/util/net"
+ "k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
+ "k8s.io/apiserver/pkg/endpoints/handlers/responsewriters"
+)
+
+// GroupManager is an interface that allows dynamic mutation of the existing webservice to handle
+// API groups being added or removed.
+type GroupManager interface {
+ AddGroup(apiGroup metav1.APIGroup)
+ RemoveGroup(groupName string)
+
+ WebService() *restful.WebService
+}
+
+// rootAPIsHandler creates a webservice serving api group discovery.
+// The list of APIGroups may change while the server is running because additional resources
+// are registered or removed. It is not safe to cache the values.
+type rootAPIsHandler struct {
+ // addresses is used to build cluster IPs for discovery.
+ addresses Addresses
+
+ serializer runtime.NegotiatedSerializer
+
+ // Map storing information about all groups to be exposed in discovery response.
+ // The map is from name to the group.
+ lock sync.RWMutex
+ apiGroups map[string]metav1.APIGroup
+ // apiGroupNames preserves insertion order
+ apiGroupNames []string
+}
+
+func NewRootAPIsHandler(addresses Addresses, serializer runtime.NegotiatedSerializer) *rootAPIsHandler {
+ // Because in release 1.1, /apis returns response with empty APIVersion, we
+ // use stripVersionNegotiatedSerializer to keep the response backwards
+ // compatible.
+ serializer = stripVersionNegotiatedSerializer{serializer}
+
+ return &rootAPIsHandler{
+ addresses: addresses,
+ serializer: serializer,
+ apiGroups: map[string]metav1.APIGroup{},
+ }
+}
+
+func (s *rootAPIsHandler) AddGroup(apiGroup metav1.APIGroup) {
+ s.lock.Lock()
+ defer s.lock.Unlock()
+
+ _, alreadyExists := s.apiGroups[apiGroup.Name]
+
+ s.apiGroups[apiGroup.Name] = apiGroup
+ if !alreadyExists {
+ s.apiGroupNames = append(s.apiGroupNames, apiGroup.Name)
+ }
+}
+
+func (s *rootAPIsHandler) RemoveGroup(groupName string) {
+ s.lock.Lock()
+ defer s.lock.Unlock()
+
+ delete(s.apiGroups, groupName)
+ for i := range s.apiGroupNames {
+ if s.apiGroupNames[i] == groupName {
+ s.apiGroupNames = append(s.apiGroupNames[:i], s.apiGroupNames[i+1:]...)
+ break
+ }
+ }
+}
+
+func (s *rootAPIsHandler) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+ s.lock.RLock()
+ defer s.lock.RUnlock()
+
+ orderedGroups := []metav1.APIGroup{}
+ for _, groupName := range s.apiGroupNames {
+ orderedGroups = append(orderedGroups, s.apiGroups[groupName])
+ }
+
+ clientIP := utilnet.GetClientIP(req)
+ serverCIDR := s.addresses.ServerAddressByClientCIDRs(clientIP)
+ groups := make([]metav1.APIGroup, len(orderedGroups))
+ for i := range orderedGroups {
+ groups[i] = orderedGroups[i]
+ groups[i].ServerAddressByClientCIDRs = serverCIDR
+ }
+
+ responsewriters.WriteObjectNegotiated(s.serializer, schema.GroupVersion{}, resp, req, http.StatusOK, &metav1.APIGroupList{Groups: groups})
+}
+
+func (s *rootAPIsHandler) restfulHandle(req *restful.Request, resp *restful.Response) {
+ s.ServeHTTP(resp.ResponseWriter, req.Request)
+}
+
+// WebService returns a webservice serving api group discovery.
+// Note: during the server runtime apiGroups might change.
+func (s *rootAPIsHandler) WebService() *restful.WebService {
+ mediaTypes, _ := negotiation.MediaTypesForSerializer(s.serializer)
+ ws := new(restful.WebService)
+ ws.Path(APIGroupPrefix)
+ ws.Doc("get available API versions")
+ ws.Route(ws.GET("/").To(s.restfulHandle).
+ Doc("get available API versions").
+ Operation("getAPIVersions").
+ Produces(mediaTypes...).
+ Consumes(mediaTypes...).
+ Writes(metav1.APIGroupList{}))
+ return ws
+}