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apiserver.go
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apiserver.go
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// Copyright 2019 Antrea 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 apiserver
import (
"context"
apierrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apiserver/pkg/registry/rest"
genericapiserver "k8s.io/apiserver/pkg/server"
"k8s.io/client-go/informers"
"k8s.io/klog"
"k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
"github.com/vmware-tanzu/antrea/pkg/apis/controlplane"
cpinstall "github.com/vmware-tanzu/antrea/pkg/apis/controlplane/install"
"github.com/vmware-tanzu/antrea/pkg/apis/networking"
networkinginstall "github.com/vmware-tanzu/antrea/pkg/apis/networking/install"
apistats "github.com/vmware-tanzu/antrea/pkg/apis/stats"
statsinstall "github.com/vmware-tanzu/antrea/pkg/apis/stats/install"
systeminstall "github.com/vmware-tanzu/antrea/pkg/apis/system/install"
system "github.com/vmware-tanzu/antrea/pkg/apis/system/v1beta1"
"github.com/vmware-tanzu/antrea/pkg/apiserver/certificate"
"github.com/vmware-tanzu/antrea/pkg/apiserver/handlers/endpoint"
"github.com/vmware-tanzu/antrea/pkg/apiserver/handlers/loglevel"
"github.com/vmware-tanzu/antrea/pkg/apiserver/handlers/webhook"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/controlplane/nodestatssummary"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/networkpolicy/addressgroup"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/networkpolicy/appliedtogroup"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/networkpolicy/clustergroupmember"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/networkpolicy/groupassociation"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/networkpolicy/networkpolicy"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/stats/antreaclusternetworkpolicystats"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/stats/antreanetworkpolicystats"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/stats/networkpolicystats"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/system/controllerinfo"
"github.com/vmware-tanzu/antrea/pkg/apiserver/registry/system/supportbundle"
"github.com/vmware-tanzu/antrea/pkg/apiserver/storage"
controllernetworkpolicy "github.com/vmware-tanzu/antrea/pkg/controller/networkpolicy"
"github.com/vmware-tanzu/antrea/pkg/controller/querier"
"github.com/vmware-tanzu/antrea/pkg/controller/stats"
"github.com/vmware-tanzu/antrea/pkg/features"
)
var (
// Scheme defines methods for serializing and deserializing API objects.
Scheme = runtime.NewScheme()
// Codecs provides methods for retrieving codecs and serializers for specific
// versions and content types.
Codecs = serializer.NewCodecFactory(Scheme)
// #nosec G101: false positive triggered by variable name which includes "token"
TokenPath = "/var/run/antrea/apiserver/loopback-client-token"
)
func init() {
cpinstall.Install(Scheme)
systeminstall.Install(Scheme)
networkinginstall.Install(Scheme)
statsinstall.Install(Scheme)
// We need to add the options to empty v1, see sample-apiserver/pkg/apiserver/apiserver.go.
metav1.AddToGroupVersion(Scheme, schema.GroupVersion{Version: "v1"})
}
// ExtraConfig holds custom apiserver config.
type ExtraConfig struct {
addressGroupStore storage.Interface
appliedToGroupStore storage.Interface
networkPolicyStore storage.Interface
controllerQuerier querier.ControllerQuerier
endpointQuerier controllernetworkpolicy.EndpointQuerier
networkPolicyController *controllernetworkpolicy.NetworkPolicyController
caCertController *certificate.CACertController
statsAggregator *stats.Aggregator
networkPolicyStatusController *controllernetworkpolicy.StatusController
}
// Config defines the config for Antrea apiserver.
type Config struct {
genericConfig *genericapiserver.Config
extraConfig ExtraConfig
}
// APIServer contains state for a Kubernetes cluster apiserver.
type APIServer struct {
GenericAPIServer *genericapiserver.GenericAPIServer
caCertController *certificate.CACertController
}
func (s *APIServer) Run(stopCh <-chan struct{}) error {
// Make sure CACertController runs once to publish the CA cert before starting APIServer.
if err := s.caCertController.RunOnce(); err != nil {
klog.Warningf("caCertController RunOnce failed: %v", err)
}
go s.caCertController.Run(1, stopCh)
return s.GenericAPIServer.PrepareRun().Run(stopCh)
}
type completedConfig struct {
genericConfig genericapiserver.CompletedConfig
extraConfig *ExtraConfig
}
func NewConfig(
genericConfig *genericapiserver.Config,
addressGroupStore, appliedToGroupStore, networkPolicyStore, groupStore storage.Interface,
caCertController *certificate.CACertController,
statsAggregator *stats.Aggregator,
controllerQuerier querier.ControllerQuerier,
networkPolicyStatusController *controllernetworkpolicy.StatusController,
endpointQuerier controllernetworkpolicy.EndpointQuerier,
npController *controllernetworkpolicy.NetworkPolicyController) *Config {
return &Config{
genericConfig: genericConfig,
extraConfig: ExtraConfig{
addressGroupStore: addressGroupStore,
appliedToGroupStore: appliedToGroupStore,
networkPolicyStore: networkPolicyStore,
caCertController: caCertController,
statsAggregator: statsAggregator,
controllerQuerier: controllerQuerier,
endpointQuerier: endpointQuerier,
networkPolicyController: npController,
networkPolicyStatusController: networkPolicyStatusController,
},
}
}
func (c *Config) Complete(informers informers.SharedInformerFactory) completedConfig {
return completedConfig{c.genericConfig.Complete(informers), &c.extraConfig}
}
func installAPIGroup(s *APIServer, c completedConfig) error {
addressGroupStorage := addressgroup.NewREST(c.extraConfig.addressGroupStore)
appliedToGroupStorage := appliedtogroup.NewREST(c.extraConfig.appliedToGroupStore)
networkPolicyStorage := networkpolicy.NewREST(c.extraConfig.networkPolicyStore)
networkPolicyStatusStorage := networkpolicy.NewStatusREST(c.extraConfig.networkPolicyStatusController)
clusterGroupMembershipStorage := clustergroupmember.NewREST(c.extraConfig.networkPolicyController)
groupAssociationStorage := groupassociation.NewREST(c.extraConfig.networkPolicyController)
nodeStatsSummaryStorage := nodestatssummary.NewREST(c.extraConfig.statsAggregator)
cpGroup := genericapiserver.NewDefaultAPIGroupInfo(controlplane.GroupName, Scheme, metav1.ParameterCodec, Codecs)
cpv1beta1Storage := map[string]rest.Storage{}
cpv1beta1Storage["addressgroups"] = addressGroupStorage
cpv1beta1Storage["appliedtogroups"] = appliedToGroupStorage
cpv1beta1Storage["networkpolicies"] = networkPolicyStorage
cpv1beta1Storage["nodestatssummaries"] = nodeStatsSummaryStorage
cpGroup.VersionedResourcesStorageMap["v1beta1"] = cpv1beta1Storage
cpv1beta2Storage := map[string]rest.Storage{}
cpv1beta2Storage["addressgroups"] = addressGroupStorage
cpv1beta2Storage["appliedtogroups"] = appliedToGroupStorage
cpv1beta2Storage["networkpolicies"] = networkPolicyStorage
cpv1beta2Storage["networkpolicies/status"] = networkPolicyStatusStorage
cpv1beta2Storage["nodestatssummaries"] = nodeStatsSummaryStorage
cpv1beta2Storage["groupassociations"] = groupAssociationStorage
cpv1beta2Storage["clustergroupmembers"] = clusterGroupMembershipStorage
cpGroup.VersionedResourcesStorageMap["v1beta2"] = cpv1beta2Storage
// TODO: networkingGroup is the legacy group of controlplane NetworkPolicy APIs. To allow live upgrades from up to
// two minor versions, the APIs must be kept for two minor releases before it can be deleted.
networkingGroup := genericapiserver.NewDefaultAPIGroupInfo(networking.GroupName, Scheme, metav1.ParameterCodec, Codecs)
networkingStorage := map[string]rest.Storage{}
networkingStorage["addressgroups"] = addressGroupStorage
networkingStorage["appliedtogroups"] = appliedToGroupStorage
networkingStorage["networkpolicies"] = networkPolicyStorage
networkingGroup.VersionedResourcesStorageMap["v1beta1"] = networkingStorage
systemGroup := genericapiserver.NewDefaultAPIGroupInfo(system.GroupName, Scheme, metav1.ParameterCodec, Codecs)
systemStorage := map[string]rest.Storage{}
systemStorage["controllerinfos"] = controllerinfo.NewREST(c.extraConfig.controllerQuerier)
bundleStorage := supportbundle.NewControllerStorage()
systemStorage["supportbundles"] = bundleStorage.SupportBundle
systemStorage["supportbundles/download"] = bundleStorage.Download
systemGroup.VersionedResourcesStorageMap["v1beta1"] = systemStorage
statsGroup := genericapiserver.NewDefaultAPIGroupInfo(apistats.GroupName, Scheme, metav1.ParameterCodec, Codecs)
statsStorage := map[string]rest.Storage{}
statsStorage["networkpolicystats"] = networkpolicystats.NewREST(c.extraConfig.statsAggregator)
statsStorage["antreaclusternetworkpolicystats"] = antreaclusternetworkpolicystats.NewREST(c.extraConfig.statsAggregator)
statsStorage["antreanetworkpolicystats"] = antreanetworkpolicystats.NewREST(c.extraConfig.statsAggregator)
statsGroup.VersionedResourcesStorageMap["v1alpha1"] = statsStorage
groups := []*genericapiserver.APIGroupInfo{&cpGroup, &networkingGroup, &systemGroup, &statsGroup}
for _, apiGroupInfo := range groups {
if err := s.GenericAPIServer.InstallAPIGroup(apiGroupInfo); err != nil {
return err
}
}
return nil
}
func (c completedConfig) New() (*APIServer, error) {
genericServer, err := c.genericConfig.New("antrea-apiserver", genericapiserver.NewEmptyDelegate())
if err != nil {
return nil, err
}
s := &APIServer{
GenericAPIServer: genericServer,
caCertController: c.extraConfig.caCertController,
}
if err := installAPIGroup(s, c); err != nil {
return nil, err
}
installHandlers(c.extraConfig, s.GenericAPIServer)
return s, nil
}
// CleanupDeprecatedAPIServices deletes the registered APIService resources for
// the deprecated Antrea API groups.
func CleanupDeprecatedAPIServices(aggregatorClient clientset.Interface) error {
// The APIService of a deprecated API group should be added to the slice.
// After Antrea upgrades from an old version to a new version that
// deprecates a registered APIService, the APIService should be deleted,
// otherwise K8s will fail to delete an existing Namespace.
// Also check: https://github.com/vmware-tanzu/antrea/issues/494
deprecatedAPIServices := []string{}
for _, as := range deprecatedAPIServices {
err := aggregatorClient.ApiregistrationV1().APIServices().Delete(context.TODO(), as, metav1.DeleteOptions{})
if err == nil {
klog.Infof("Deleted the deprecated APIService %s", as)
} else if !apierrors.IsNotFound(err) {
return err
}
}
return nil
}
func installHandlers(c *ExtraConfig, s *genericapiserver.GenericAPIServer) {
s.Handler.NonGoRestfulMux.HandleFunc("/loglevel", loglevel.HandleFunc())
s.Handler.NonGoRestfulMux.HandleFunc("/endpoint", endpoint.HandleFunc(c.endpointQuerier))
if features.DefaultFeatureGate.Enabled(features.AntreaPolicy) {
// Get new NetworkPolicyMutator
m := controllernetworkpolicy.NewNetworkPolicyMutator(c.networkPolicyController)
// Install handlers for NetworkPolicy related mutation
s.Handler.NonGoRestfulMux.HandleFunc("/mutate/acnp", webhook.HandleMutationNetworkPolicy(m))
s.Handler.NonGoRestfulMux.HandleFunc("/mutate/anp", webhook.HandleMutationNetworkPolicy(m))
// Get new NetworkPolicyValidator
v := controllernetworkpolicy.NewNetworkPolicyValidator(c.networkPolicyController)
// Install handlers for NetworkPolicy related validation
s.Handler.NonGoRestfulMux.HandleFunc("/validate/tier", webhook.HandleValidationNetworkPolicy(v))
s.Handler.NonGoRestfulMux.HandleFunc("/validate/acnp", webhook.HandleValidationNetworkPolicy(v))
s.Handler.NonGoRestfulMux.HandleFunc("/validate/anp", webhook.HandleValidationNetworkPolicy(v))
s.Handler.NonGoRestfulMux.HandleFunc("/validate/clustergroup", webhook.HandleValidationNetworkPolicy(v))
// Install a post start hook to initialize Tiers on start-up
s.AddPostStartHook("initialize-tiers", func(context genericapiserver.PostStartHookContext) error {
go c.networkPolicyController.InitializeTiers()
return nil
})
}
}