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/*
Copyright 2016 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 rest
import (
"fmt"
"net"
"net/http"
"net/url"
"strconv"
"strings"
"time"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/runtime/schema"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apiserver/pkg/registry/generic"
"k8s.io/apiserver/pkg/registry/rest"
genericapiserver "k8s.io/apiserver/pkg/server"
serverstorage "k8s.io/apiserver/pkg/server/storage"
etcdutil "k8s.io/apiserver/pkg/storage/etcd/util"
restclient "k8s.io/client-go/rest"
"k8s.io/kubernetes/pkg/api"
policyclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/policy/internalversion"
kubeletclient "k8s.io/kubernetes/pkg/kubelet/client"
"k8s.io/kubernetes/pkg/master/ports"
"k8s.io/kubernetes/pkg/registry/core/componentstatus"
configmapstore "k8s.io/kubernetes/pkg/registry/core/configmap/storage"
"k8s.io/kubernetes/pkg/registry/core/endpoint"
endpointsstore "k8s.io/kubernetes/pkg/registry/core/endpoint/storage"
eventstore "k8s.io/kubernetes/pkg/registry/core/event/storage"
limitrangestore "k8s.io/kubernetes/pkg/registry/core/limitrange/storage"
namespacestore "k8s.io/kubernetes/pkg/registry/core/namespace/storage"
nodestore "k8s.io/kubernetes/pkg/registry/core/node/storage"
pvstore "k8s.io/kubernetes/pkg/registry/core/persistentvolume/storage"
pvcstore "k8s.io/kubernetes/pkg/registry/core/persistentvolumeclaim/storage"
podstore "k8s.io/kubernetes/pkg/registry/core/pod/storage"
podtemplatestore "k8s.io/kubernetes/pkg/registry/core/podtemplate/storage"
"k8s.io/kubernetes/pkg/registry/core/rangeallocation"
controllerstore "k8s.io/kubernetes/pkg/registry/core/replicationcontroller/storage"
resourcequotastore "k8s.io/kubernetes/pkg/registry/core/resourcequota/storage"
secretstore "k8s.io/kubernetes/pkg/registry/core/secret/storage"
"k8s.io/kubernetes/pkg/registry/core/service"
"k8s.io/kubernetes/pkg/registry/core/service/allocator"
serviceallocator "k8s.io/kubernetes/pkg/registry/core/service/allocator/storage"
"k8s.io/kubernetes/pkg/registry/core/service/ipallocator"
"k8s.io/kubernetes/pkg/registry/core/service/portallocator"
servicestore "k8s.io/kubernetes/pkg/registry/core/service/storage"
serviceaccountstore "k8s.io/kubernetes/pkg/registry/core/serviceaccount/storage"
)
// LegacyRESTStorageProvider provides information needed to build RESTStorage for core, but
// does NOT implement the "normal" RESTStorageProvider (yet!)
type LegacyRESTStorageProvider struct {
StorageFactory serverstorage.StorageFactory
// Used for custom proxy dialing, and proxy TLS options
ProxyTransport http.RoundTripper
KubeletClientConfig kubeletclient.KubeletClientConfig
EventTTL time.Duration
// ServiceIPRange is used to build cluster IPs for discovery.
ServiceIPRange net.IPNet
ServiceNodePortRange utilnet.PortRange
LoopbackClientConfig *restclient.Config
}
// LegacyRESTStorage returns stateful information about particular instances of REST storage to
// master.go for wiring controllers.
// TODO remove this by running the controller as a poststarthook
type LegacyRESTStorage struct {
ServiceClusterIPAllocator rangeallocation.RangeRegistry
ServiceNodePortAllocator rangeallocation.RangeRegistry
}
func (c LegacyRESTStorageProvider) NewLegacyRESTStorage(restOptionsGetter generic.RESTOptionsGetter) (LegacyRESTStorage, genericapiserver.APIGroupInfo, error) {
apiGroupInfo := genericapiserver.APIGroupInfo{
GroupMeta: *api.Registry.GroupOrDie(api.GroupName),
VersionedResourcesStorageMap: map[string]map[string]rest.Storage{},
Scheme: api.Scheme,
ParameterCodec: api.ParameterCodec,
NegotiatedSerializer: api.Codecs,
SubresourceGroupVersionKind: map[string]schema.GroupVersionKind{},
}
if autoscalingGroupVersion := (schema.GroupVersion{Group: "autoscaling", Version: "v1"}); api.Registry.IsEnabledVersion(autoscalingGroupVersion) {
apiGroupInfo.SubresourceGroupVersionKind["replicationcontrollers/scale"] = autoscalingGroupVersion.WithKind("Scale")
}
var podDisruptionClient policyclient.PodDisruptionBudgetsGetter
if policyGroupVersion := (schema.GroupVersion{Group: "policy", Version: "v1beta1"}); api.Registry.IsEnabledVersion(policyGroupVersion) {
apiGroupInfo.SubresourceGroupVersionKind["pods/eviction"] = policyGroupVersion.WithKind("Eviction")
var err error
podDisruptionClient, err = policyclient.NewForConfig(c.LoopbackClientConfig)
if err != nil {
return LegacyRESTStorage{}, genericapiserver.APIGroupInfo{}, err
}
}
restStorage := LegacyRESTStorage{}
podTemplateStorage := podtemplatestore.NewREST(restOptionsGetter)
eventStorage := eventstore.NewREST(restOptionsGetter, uint64(c.EventTTL.Seconds()))
limitRangeStorage := limitrangestore.NewREST(restOptionsGetter)
resourceQuotaStorage, resourceQuotaStatusStorage := resourcequotastore.NewREST(restOptionsGetter)
secretStorage := secretstore.NewREST(restOptionsGetter)
serviceAccountStorage := serviceaccountstore.NewREST(restOptionsGetter)
persistentVolumeStorage, persistentVolumeStatusStorage := pvstore.NewREST(restOptionsGetter)
persistentVolumeClaimStorage, persistentVolumeClaimStatusStorage := pvcstore.NewREST(restOptionsGetter)
configMapStorage := configmapstore.NewREST(restOptionsGetter)
namespaceStorage, namespaceStatusStorage, namespaceFinalizeStorage := namespacestore.NewREST(restOptionsGetter)
endpointsStorage := endpointsstore.NewREST(restOptionsGetter)
endpointRegistry := endpoint.NewRegistry(endpointsStorage)
nodeStorage, err := nodestore.NewStorage(restOptionsGetter, c.KubeletClientConfig, c.ProxyTransport)
if err != nil {
return LegacyRESTStorage{}, genericapiserver.APIGroupInfo{}, err
}
podStorage := podstore.NewStorage(
restOptionsGetter,
nodeStorage.KubeletConnectionInfo,
c.ProxyTransport,
podDisruptionClient,
)
serviceRESTStorage, serviceStatusStorage := servicestore.NewREST(restOptionsGetter)
serviceRegistry := service.NewRegistry(serviceRESTStorage)
var serviceClusterIPRegistry rangeallocation.RangeRegistry
serviceClusterIPRange := c.ServiceIPRange
if serviceClusterIPRange.IP == nil {
return LegacyRESTStorage{}, genericapiserver.APIGroupInfo{}, fmt.Errorf("service clusterIPRange is missing")
}
serviceStorageConfig, err := c.StorageFactory.NewConfig(api.Resource("services"))
if err != nil {
return LegacyRESTStorage{}, genericapiserver.APIGroupInfo{}, err
}
ServiceClusterIPAllocator := ipallocator.NewAllocatorCIDRRange(&serviceClusterIPRange, func(max int, rangeSpec string) allocator.Interface {
mem := allocator.NewAllocationMap(max, rangeSpec)
// TODO etcdallocator package to return a storage interface via the storageFactory
etcd := serviceallocator.NewEtcd(mem, "/ranges/serviceips", api.Resource("serviceipallocations"), serviceStorageConfig)
serviceClusterIPRegistry = etcd
return etcd
})
restStorage.ServiceClusterIPAllocator = serviceClusterIPRegistry
var serviceNodePortRegistry rangeallocation.RangeRegistry
ServiceNodePortAllocator := portallocator.NewPortAllocatorCustom(c.ServiceNodePortRange, func(max int, rangeSpec string) allocator.Interface {
mem := allocator.NewAllocationMap(max, rangeSpec)
// TODO etcdallocator package to return a storage interface via the storageFactory
etcd := serviceallocator.NewEtcd(mem, "/ranges/servicenodeports", api.Resource("servicenodeportallocations"), serviceStorageConfig)
serviceNodePortRegistry = etcd
return etcd
})
restStorage.ServiceNodePortAllocator = serviceNodePortRegistry
controllerStorage := controllerstore.NewStorage(restOptionsGetter)
serviceRest := service.NewStorage(serviceRegistry, endpointRegistry, ServiceClusterIPAllocator, ServiceNodePortAllocator, c.ProxyTransport)
restStorageMap := map[string]rest.Storage{
"pods": podStorage.Pod,
"pods/attach": podStorage.Attach,
"pods/status": podStorage.Status,
"pods/log": podStorage.Log,
"pods/exec": podStorage.Exec,
"pods/portforward": podStorage.PortForward,
"pods/proxy": podStorage.Proxy,
"pods/binding": podStorage.Binding,
"bindings": podStorage.Binding,
"podTemplates": podTemplateStorage,
"replicationControllers": controllerStorage.Controller,
"replicationControllers/status": controllerStorage.Status,
"services": serviceRest.Service,
"services/proxy": serviceRest.Proxy,
"services/status": serviceStatusStorage,
"endpoints": endpointsStorage,
"nodes": nodeStorage.Node,
"nodes/status": nodeStorage.Status,
"nodes/proxy": nodeStorage.Proxy,
"events": eventStorage,
"limitRanges": limitRangeStorage,
"resourceQuotas": resourceQuotaStorage,
"resourceQuotas/status": resourceQuotaStatusStorage,
"namespaces": namespaceStorage,
"namespaces/status": namespaceStatusStorage,
"namespaces/finalize": namespaceFinalizeStorage,
"secrets": secretStorage,
"serviceAccounts": serviceAccountStorage,
"persistentVolumes": persistentVolumeStorage,
"persistentVolumes/status": persistentVolumeStatusStorage,
"persistentVolumeClaims": persistentVolumeClaimStorage,
"persistentVolumeClaims/status": persistentVolumeClaimStatusStorage,
"configMaps": configMapStorage,
"componentStatuses": componentstatus.NewStorage(componentStatusStorage{c.StorageFactory}.serversToValidate),
}
if api.Registry.IsEnabledVersion(schema.GroupVersion{Group: "autoscaling", Version: "v1"}) {
restStorageMap["replicationControllers/scale"] = controllerStorage.Scale
}
if api.Registry.IsEnabledVersion(schema.GroupVersion{Group: "policy", Version: "v1beta1"}) {
restStorageMap["pods/eviction"] = podStorage.Eviction
}
apiGroupInfo.VersionedResourcesStorageMap["v1"] = restStorageMap
return restStorage, apiGroupInfo, nil
}
func (p LegacyRESTStorageProvider) GroupName() string {
return api.GroupName
}
type componentStatusStorage struct {
storageFactory serverstorage.StorageFactory
}
func (s componentStatusStorage) serversToValidate() map[string]*componentstatus.Server {
serversToValidate := map[string]*componentstatus.Server{
"controller-manager": {Addr: "127.0.0.1", Port: ports.ControllerManagerPort, Path: "/healthz"},
"scheduler": {Addr: "127.0.0.1", Port: ports.SchedulerPort, Path: "/healthz"},
}
for ix, machine := range s.storageFactory.Backends() {
etcdUrl, err := url.Parse(machine.Server)
if err != nil {
glog.Errorf("Failed to parse etcd url for validation: %v", err)
continue
}
var port int
var addr string
if strings.Contains(etcdUrl.Host, ":") {
var portString string
addr, portString, err = net.SplitHostPort(etcdUrl.Host)
if err != nil {
glog.Errorf("Failed to split host/port: %s (%v)", etcdUrl.Host, err)
continue
}
port, _ = strconv.Atoi(portString)
} else {
addr = etcdUrl.Host
port = 2379
}
// TODO: etcd health checking should be abstracted in the storage tier
serversToValidate[fmt.Sprintf("etcd-%d", ix)] = &componentstatus.Server{
Addr: addr,
EnableHTTPS: etcdUrl.Scheme == "https",
TLSConfig: machine.TLSConfig,
Port: port,
Path: "/health",
Validate: etcdutil.EtcdHealthCheck,
}
}
return serversToValidate
}
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