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https://github.com/k3s-io/kubernetes.git
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create apiserver for extensions
This commit is contained in:
deads2k
parent
72eef13e3e
commit
c7e68a27be
42
staging/src/k8s.io/kube-apiextensions-server/main.go
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42
staging/src/k8s.io/kube-apiextensions-server/main.go
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/*
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Copyright 2017 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 main
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import (
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"flag"
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"os"
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"runtime"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/apiserver/pkg/util/logs"
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"k8s.io/kube-apiextensions-server/pkg/cmd/server"
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)
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func main() {
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logs.InitLogs()
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defer logs.FlushLogs()
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if len(os.Getenv("GOMAXPROCS")) == 0 {
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runtime.GOMAXPROCS(runtime.NumCPU())
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}
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cmd := server.NewCommandStartCustomResourcesServer(os.Stdout, os.Stderr, wait.NeverStop)
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cmd.Flags().AddGoFlagSet(flag.CommandLine)
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if err := cmd.Execute(); err != nil {
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panic(err)
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}
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}
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@ -0,0 +1,116 @@
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/*
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Copyright 2017 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 apiserver
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import (
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"k8s.io/apimachinery/pkg/apimachinery/announced"
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"k8s.io/apimachinery/pkg/apimachinery/registered"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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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/runtime/serializer"
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"k8s.io/apimachinery/pkg/version"
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"k8s.io/apiserver/pkg/registry/rest"
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genericapiserver "k8s.io/apiserver/pkg/server"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions/install"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions/v1alpha1"
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"k8s.io/kube-apiextensions-server/pkg/registry/customresource"
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// make sure the generated client works
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_ "k8s.io/kube-apiextensions-server/pkg/client/clientset/clientset"
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_ "k8s.io/kube-apiextensions-server/pkg/client/clientset/internalclientset"
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_ "k8s.io/kube-apiextensions-server/pkg/client/informers/externalversions"
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_ "k8s.io/kube-apiextensions-server/pkg/client/informers/internalversion"
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)
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var (
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groupFactoryRegistry = make(announced.APIGroupFactoryRegistry)
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registry = registered.NewOrDie("")
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Scheme = runtime.NewScheme()
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Codecs = serializer.NewCodecFactory(Scheme)
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)
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func init() {
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install.Install(groupFactoryRegistry, registry, Scheme)
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// we need to add the options to empty v1
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metav1.AddToGroupVersion(Scheme, schema.GroupVersion{Group: "", Version: "v1"})
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unversioned := schema.GroupVersion{Group: "", Version: "v1"}
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Scheme.AddUnversionedTypes(unversioned,
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&metav1.Status{},
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&metav1.APIVersions{},
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&metav1.APIGroupList{},
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&metav1.APIGroup{},
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&metav1.APIResourceList{},
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)
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}
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type Config struct {
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GenericConfig *genericapiserver.Config
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}
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type CustomResources struct {
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GenericAPIServer *genericapiserver.GenericAPIServer
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}
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type completedConfig struct {
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*Config
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}
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// Complete fills in any fields not set that are required to have valid data. It's mutating the receiver.
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func (c *Config) Complete() completedConfig {
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c.GenericConfig.Complete()
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c.GenericConfig.Version = &version.Info{
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Major: "0",
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Minor: "1",
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}
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return completedConfig{c}
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}
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// SkipComplete provides a way to construct a server instance without config completion.
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func (c *Config) SkipComplete() completedConfig {
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return completedConfig{c}
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}
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// New returns a new instance of CustomResources from the given config.
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func (c completedConfig) New() (*CustomResources, error) {
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genericServer, err := c.Config.GenericConfig.SkipComplete().New() // completion is done in Complete, no need for a second time
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if err != nil {
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return nil, err
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}
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s := &CustomResources{
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GenericAPIServer: genericServer,
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}
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apiGroupInfo := genericapiserver.NewDefaultAPIGroupInfo(apiextensions.GroupName, registry, Scheme, metav1.ParameterCodec, Codecs)
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apiGroupInfo.GroupMeta.GroupVersion = v1alpha1.SchemeGroupVersion
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v1alpha1storage := map[string]rest.Storage{}
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v1alpha1storage["customresources"] = customresource.NewREST(Scheme, c.GenericConfig.RESTOptionsGetter)
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apiGroupInfo.VersionedResourcesStorageMap["v1alpha1"] = v1alpha1storage
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if err := s.GenericAPIServer.InstallAPIGroup(&apiGroupInfo); err != nil {
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return nil, err
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}
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return s, nil
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}
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@ -0,0 +1,114 @@
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/*
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Copyright 2017 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 server
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import (
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"fmt"
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"io"
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"net"
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"github.com/spf13/cobra"
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genericapiserver "k8s.io/apiserver/pkg/server"
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genericoptions "k8s.io/apiserver/pkg/server/options"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions/v1alpha1"
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"k8s.io/kube-apiextensions-server/pkg/apiserver"
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)
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const defaultEtcdPathPrefix = "/registry/apiextensions.kubernetes.io"
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type CustomResourcesServerOptions struct {
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RecommendedOptions *genericoptions.RecommendedOptions
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StdOut io.Writer
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StdErr io.Writer
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}
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func NewCustomResourcesServerOptions(out, errOut io.Writer) *CustomResourcesServerOptions {
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o := &CustomResourcesServerOptions{
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RecommendedOptions: genericoptions.NewRecommendedOptions(defaultEtcdPathPrefix, apiserver.Scheme, apiserver.Codecs.LegacyCodec(v1alpha1.SchemeGroupVersion)),
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StdOut: out,
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StdErr: errOut,
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}
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return o
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}
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func NewCommandStartCustomResourcesServer(out, errOut io.Writer, stopCh <-chan struct{}) *cobra.Command {
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o := NewCustomResourcesServerOptions(out, errOut)
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cmd := &cobra.Command{
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Short: "Launch an API extensions API server",
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Long: "Launch an API extensions API server",
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RunE: func(c *cobra.Command, args []string) error {
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if err := o.Complete(); err != nil {
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return err
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}
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if err := o.Validate(args); err != nil {
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return err
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}
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if err := o.RunCustomResourcesServer(stopCh); err != nil {
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return err
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}
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return nil
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},
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}
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flags := cmd.Flags()
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o.RecommendedOptions.AddFlags(flags)
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return cmd
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}
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func (o CustomResourcesServerOptions) Validate(args []string) error {
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return nil
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}
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func (o *CustomResourcesServerOptions) Complete() error {
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return nil
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}
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func (o CustomResourcesServerOptions) Config() (*apiserver.Config, error) {
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// TODO have a "real" external address
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if err := o.RecommendedOptions.SecureServing.MaybeDefaultWithSelfSignedCerts("localhost", nil, []net.IP{net.ParseIP("127.0.0.1")}); err != nil {
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return nil, fmt.Errorf("error creating self-signed certificates: %v", err)
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}
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serverConfig := genericapiserver.NewConfig(apiserver.Codecs)
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if err := o.RecommendedOptions.ApplyTo(serverConfig); err != nil {
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return nil, err
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}
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config := &apiserver.Config{
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GenericConfig: serverConfig,
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}
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return config, nil
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}
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func (o CustomResourcesServerOptions) RunCustomResourcesServer(stopCh <-chan struct{}) error {
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config, err := o.Config()
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if err != nil {
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return err
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}
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server, err := config.Complete().New()
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if err != nil {
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return err
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}
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return server.GenericAPIServer.PrepareRun().Run(stopCh)
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}
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@ -0,0 +1,54 @@
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/*
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Copyright 2017 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 customresource
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import (
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apiserver/pkg/registry/generic"
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genericregistry "k8s.io/apiserver/pkg/registry/generic/registry"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions"
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)
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// rest implements a RESTStorage for API services against etcd
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type REST struct {
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*genericregistry.Store
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}
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// NewREST returns a RESTStorage object that will work against API services.
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func NewREST(scheme *runtime.Scheme, optsGetter generic.RESTOptionsGetter) *REST {
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strategy := NewStrategy(scheme)
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store := &genericregistry.Store{
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Copier: scheme,
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NewFunc: func() runtime.Object { return &apiextensions.CustomResource{} },
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NewListFunc: func() runtime.Object { return &apiextensions.CustomResourceList{} },
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ObjectNameFunc: func(obj runtime.Object) (string, error) {
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return obj.(*apiextensions.CustomResource).Name, nil
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},
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PredicateFunc: MatchCustomResource,
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QualifiedResource: apiextensions.Resource("customresources"),
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CreateStrategy: strategy,
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UpdateStrategy: strategy,
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DeleteStrategy: strategy,
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}
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options := &generic.StoreOptions{RESTOptions: optsGetter, AttrFunc: GetAttrs}
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if err := store.CompleteWithOptions(options); err != nil {
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panic(err) // TODO: Propagate error up
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}
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return &REST{store}
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}
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@ -0,0 +1,93 @@
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/*
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Copyright 2017 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 customresource
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/validation/field"
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genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
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"k8s.io/apiserver/pkg/registry/generic"
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"k8s.io/apiserver/pkg/storage"
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"k8s.io/apiserver/pkg/storage/names"
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"k8s.io/kube-apiextensions-server/pkg/apis/apiextensions"
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)
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type apiServerStrategy struct {
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runtime.ObjectTyper
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names.NameGenerator
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}
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func NewStrategy(typer runtime.ObjectTyper) apiServerStrategy {
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return apiServerStrategy{typer, names.SimpleNameGenerator}
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}
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func (apiServerStrategy) NamespaceScoped() bool {
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return false
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}
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func (apiServerStrategy) PrepareForCreate(ctx genericapirequest.Context, obj runtime.Object) {
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}
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func (apiServerStrategy) PrepareForUpdate(ctx genericapirequest.Context, obj, old runtime.Object) {
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}
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func (apiServerStrategy) Validate(ctx genericapirequest.Context, obj runtime.Object) field.ErrorList {
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return field.ErrorList{}
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}
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func (apiServerStrategy) AllowCreateOnUpdate() bool {
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return false
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}
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func (apiServerStrategy) AllowUnconditionalUpdate() bool {
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return false
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}
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func (apiServerStrategy) Canonicalize(obj runtime.Object) {
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}
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func (apiServerStrategy) ValidateUpdate(ctx genericapirequest.Context, obj, old runtime.Object) field.ErrorList {
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return field.ErrorList{}
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}
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func GetAttrs(obj runtime.Object) (labels.Set, fields.Set, error) {
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apiserver, ok := obj.(*apiextensions.CustomResource)
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if !ok {
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return nil, nil, fmt.Errorf("given object is not a CustomResource.")
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}
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return labels.Set(apiserver.ObjectMeta.Labels), CustomResourceToSelectableFields(apiserver), nil
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}
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// MatchCustomResource is the filter used by the generic etcd backend to watch events
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// from etcd to clients of the apiserver only interested in specific labels/fields.
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func MatchCustomResource(label labels.Selector, field fields.Selector) storage.SelectionPredicate {
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return storage.SelectionPredicate{
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Label: label,
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Field: field,
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GetAttrs: GetAttrs,
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}
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}
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// CustomResourceToSelectableFields returns a field set that represents the object.
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func CustomResourceToSelectableFields(obj *apiextensions.CustomResource) fields.Set {
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return generic.ObjectMetaFieldsSet(&obj.ObjectMeta, true)
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}
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