forked from operator-framework/operator-sdk
/
framework.go
129 lines (121 loc) · 4.47 KB
/
framework.go
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// Copyright 2018 The Operator-SDK 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 test
import (
goctx "context"
"fmt"
"sync"
"time"
extensions "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
extscheme "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset/scheme"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/client-go/discovery"
"k8s.io/client-go/discovery/cached"
"k8s.io/client-go/kubernetes"
cgoscheme "k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
dynclient "sigs.k8s.io/controller-runtime/pkg/client"
)
var (
// mutex for AddToFrameworkScheme
mutex = sync.Mutex{}
// Global framework struct
Global *Framework
)
type Framework struct {
KubeConfig *rest.Config
KubeClient kubernetes.Interface
ExtensionsClient *extensions.Clientset
Scheme *runtime.Scheme
RestMapper *discovery.DeferredDiscoveryRESTMapper
DynamicClient dynclient.Client
DynamicDecoder runtime.Decoder
NamespacedManPath *string
}
func setup(kubeconfigPath, namespacedManPath *string) error {
kubeconfig, err := clientcmd.BuildConfigFromFlags("", *kubeconfigPath)
if err != nil {
return fmt.Errorf("failed to build the kubeconfig: %v", err)
}
kubeclient, err := kubernetes.NewForConfig(kubeconfig)
if err != nil {
return fmt.Errorf("failed to build the kubeclient: %v", err)
}
extensionsClient, err := extensions.NewForConfig(kubeconfig)
if err != nil {
return fmt.Errorf("failed to build the extensionsClient: %v", err)
}
scheme := runtime.NewScheme()
cgoscheme.AddToScheme(scheme)
extscheme.AddToScheme(scheme)
dynClient, err := dynclient.New(kubeconfig, dynclient.Options{Scheme: scheme})
if err != nil {
return fmt.Errorf("failed to build the dynamic client: %v", err)
}
dynDec := serializer.NewCodecFactory(scheme).UniversalDeserializer()
Global = &Framework{
KubeConfig: kubeconfig,
KubeClient: kubeclient,
ExtensionsClient: extensionsClient,
Scheme: scheme,
DynamicClient: dynClient,
DynamicDecoder: dynDec,
NamespacedManPath: namespacedManPath,
}
return nil
}
type addToSchemeFunc func(*runtime.Scheme) error
// AddToFrameworkScheme allows users to add the scheme for their custom resources
// to the framework's scheme for use with the dynamic client. The user provides
// the addToScheme function (located in the register.go file of their operator
// project) and the List struct for their custom resource. For example, for a
// memcached operator, the list stuct may look like:
// &MemcachedList{
// TypeMeta: metav1.TypeMeta{
// Kind: "Memcached",
// APIVersion: "cache.example.com/v1alpha1",
// },
// }
// The List object is needed because the CRD has not always been fully registered
// by the time this function is called. If the CRD takes more than 5 seconds to
// become ready, this function throws an error
func AddToFrameworkScheme(addToScheme addToSchemeFunc, obj runtime.Object) error {
mutex.Lock()
defer mutex.Unlock()
err := addToScheme(Global.Scheme)
if err != nil {
return err
}
cachedDiscoveryClient := cached.NewMemCacheClient(Global.KubeClient.Discovery())
Global.RestMapper = discovery.NewDeferredDiscoveryRESTMapper(cachedDiscoveryClient, meta.InterfacesForUnstructured)
Global.RestMapper.Reset()
Global.DynamicClient, err = dynclient.New(Global.KubeConfig, dynclient.Options{Scheme: Global.Scheme, Mapper: Global.RestMapper})
err = wait.PollImmediate(time.Second, time.Second*10, func() (done bool, err error) {
err = Global.DynamicClient.List(goctx.TODO(), &dynclient.ListOptions{Namespace: "default"}, obj)
if err != nil {
Global.RestMapper.Reset()
return false, nil
}
return true, nil
})
if err != nil {
return fmt.Errorf("failed to build the dynamic client: %v", err)
}
Global.DynamicDecoder = serializer.NewCodecFactory(Global.Scheme).UniversalDeserializer()
return nil
}