add tansport for rest config

Signed-off-by: calvin0327 <[email protected]>

client/client.go

@@ -17,6 +17,7 @@ limitations under the License.
 package client
 
 import (
+	"net/http"
 	"time"
 
 	"k8s.io/apimachinery/pkg/runtime"
@@ -28,7 +29,7 @@ import (
 	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	clusterv1alpha2 "github.com/clusterpedia-io/api/cluster/v1alpha2"
-	"github.com/clusterpedia-io/client-go/constants"
+	"github.com/clusterpedia-io/client-go/tools/transport"
 )
 
 const (
@@ -37,46 +38,48 @@ const (
 	DefaultTimeoutSeconds         = 10
 )
 
+var Scheme = runtime.NewScheme()
+
+func init() {
+	utilruntime.Must(clientgoscheme.AddToScheme(Scheme))
+	utilruntime.Must(clusterv1alpha2.AddToScheme(Scheme))
+}
+
 func Client() (client.Client, error) {
-	restConfig, err := ctrl.GetConfig()
+	config, err := ctrl.GetConfig()
 	if err != nil {
 		return nil, err
 	}
 
-	return newClient(restConfig)
+	return newClient(config)
 }
 
 func ClusterClient(cluster string) (client.Client, error) {
-	restConfig, err := ctrl.GetConfig()
+	config, err := ctrl.GetConfig()
 	if err != nil {
 		return nil, err
 	}
 
-	return newClient(restConfig, cluster)
+	return newClient(config, cluster)
 }
 
-func GetClient(restConfig *rest.Config, cluster ...string) (client.Client, error) {
-	return newClient(restConfig, cluster...)
+func GetClient(config *rest.Config, cluster ...string) (client.Client, error) {
+	return newClient(config, cluster...)
 }
 
-func newClient(restConfig *rest.Config, cluster ...string) (client.Client, error) {
+func newClient(config *rest.Config, cluster ...string) (client.Client, error) {
 	var err error
-
 	if len(cluster) == 1 {
-		restConfig, err = ClusterConfigFor(restConfig, cluster[0])
+		config, err = ClusterConfigFor(config, cluster[0])
 	} else {
-		restConfig, err = ConfigFor(restConfig)
+		config, err = ConfigFor(config)
 	}
 	if err != nil {
 		return nil, err
 	}
 
-	scheme := runtime.NewScheme()
-	utilruntime.Must(clientgoscheme.AddToScheme(scheme))
-	utilruntime.Must(clusterv1alpha2.AddToScheme(scheme))
-
-	c, err := client.New(restConfig, client.Options{
-		Scheme: scheme,
+	c, err := client.New(config, client.Options{
+		Scheme: Scheme,
 	})
 	if err != nil {
 		return nil, err
@@ -85,56 +88,63 @@ func newClient(restConfig *rest.Config, cluster ...string) (client.Client, error
 	return c, nil
 }
 
-func ConfigFor(cfg *rest.Config) (*rest.Config, error) {
-	configShallowCopy := *cfg
-
-	// reset clusterpedia api path
-	if err := SetConfigDefaults(&configShallowCopy); err != nil {
+func NewForConfig(cfg *rest.Config) (kubernetes.Interface, error) {
+	config, err := ConfigFor(cfg)
+	if err != nil {
 		return nil, err
 	}
 
-	return &configShallowCopy, nil
-}
-
-func ClusterConfigFor(cfg *rest.Config, cluster string) (*rest.Config, error) {
-	configShallowCopy, err := ConfigFor(cfg)
+	kubeClient, err := kubernetes.NewForConfig(config)
 	if err != nil {
 		return nil, err
 	}
-	configShallowCopy.Host += constants.ClusterAPIPath + cluster
-	return configShallowCopy, nil
+
+	return kubeClient, nil
 }
 
-func NewForConfig(cfg *rest.Config) (kubernetes.Interface, error) {
-	clientConfig, err := ConfigFor(cfg)
+func NewClusterForConfig(cfg *rest.Config, cluster string) (kubernetes.Interface, error) {
+	config, err := ClusterConfigFor(cfg, cluster)
 	if err != nil {
 		return nil, err
 	}
 
-	kubeClient, err := kubernetes.NewForConfig(clientConfig)
+	kubeClient, err := kubernetes.NewForConfig(config)
 	if err != nil {
 		return nil, err
 	}
 
 	return kubeClient, nil
 }
 
-func NewClusterForConfig(cfg *rest.Config, cluster string) (kubernetes.Interface, error) {
-	clientConfig, err := ClusterConfigFor(cfg, cluster)
-	if err != nil {
+func ConfigFor(cfg *rest.Config) (*rest.Config, error) {
+	configShallowCopy := *cfg
+	if err := SetConfigDefaults(&configShallowCopy); err != nil {
 		return nil, err
 	}
 
-	kubeClient, err := kubernetes.NewForConfig(clientConfig)
-	if err != nil {
+	// wrap a transport to rest client config
+	configShallowCopy.Wrap(func(rt http.RoundTripper) http.RoundTripper {
+		return transport.NewTransport(configShallowCopy.Host, rt)
+	})
+
+	return &configShallowCopy, nil
+}
+
+func ClusterConfigFor(cfg *rest.Config, cluster string) (*rest.Config, error) {
+	configShallowCopy := *cfg
+	if err := SetConfigDefaults(&configShallowCopy); err != nil {
 		return nil, err
 	}
 
-	return kubeClient, nil
+	// wrap a cluster transport to rest client config
+	configShallowCopy.Wrap(func(rt http.RoundTripper) http.RoundTripper {
+		return transport.NewTransportForCluster(configShallowCopy.Host, cluster, rt)
+	})
+
+	return &configShallowCopy, nil
 }
 
 func SetConfigDefaults(config *rest.Config) error {
-	config.Host += constants.ClusterPediaAPIPath
 	if config.Timeout == 0 {
 		config.Timeout = DefaultTimeoutSeconds * time.Second
 	}

examples/clusterpedia-client/main.go

@@ -1,62 +1,28 @@
-/*
-Copyright 2021 clusterpedia 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 main
 
 import (
 	"context"
 	"fmt"
 
-	clusterpediaclient "github.com/clusterpedia-io/client-go/clusterpediaclient"
-	"github.com/clusterpedia-io/client-go/tools/builder"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
-
 	ctrl "sigs.k8s.io/controller-runtime"
+
+	"github.com/clusterpedia-io/client-go/client"
 )
 
 func main() {
-	restConfig, err := ctrl.GetConfig()
+	config, err := ctrl.GetConfig()
 	if err != nil {
 		panic(err)
 	}
-	cc, err := clusterpediaclient.NewForConfig(restConfig)
+	client, err := client.NewClusterForConfig(config, "cluster1")
 	if err != nil {
 		panic(err)
 	}
 
-	collectionResource, err := cc.PediaClusterV1beta1().CollectionResource().List(context.TODO(), metav1.ListOptions{})
+	pod, err := client.CoreV1().Pods("default").Get(context.TODO(), "pod1", metav1.GetOptions{})
 	if err != nil {
 		panic(err)
 	}
-
-	for _, item := range collectionResource.Items {
-		fmt.Printf("resource info: %v\n", item)
-	}
-
-	// build listOptions
-	options := builder.ListOptionsBuilder().
-		Namespaces("kube-system").
-		Options()
-
-	resources, err := cc.PediaClusterV1beta1().CollectionResource().Fetch(context.TODO(), "workflows", options, nil)
-	if err != nil {
-		panic(err)
-	}
-
-	for _, item := range resources.Items {
-		fmt.Printf("resource info: %v\n", item)
-	}
+	fmt.Println(pod)
 }

examples/collectionresource-client/main.go

@@ -0,0 +1,62 @@
+/*
+Copyright 2021 clusterpedia 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 main
+
+import (
+	"context"
+	"fmt"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	ctrl "sigs.k8s.io/controller-runtime"
+
+	clusterpediaclient "github.com/clusterpedia-io/client-go/clusterpediaclient"
+	"github.com/clusterpedia-io/client-go/tools/builder"
+)
+
+func main() {
+	restConfig, err := ctrl.GetConfig()
+	if err != nil {
+		panic(err)
+	}
+	cc, err := clusterpediaclient.NewForConfig(restConfig)
+	if err != nil {
+		panic(err)
+	}
+
+	collectionResource, err := cc.PediaClusterV1beta1().CollectionResource().List(context.TODO(), metav1.ListOptions{})
+	if err != nil {
+		panic(err)
+	}
+
+	for _, item := range collectionResource.Items {
+		fmt.Printf("resource info: %v\n", item)
+	}
+
+	// build listOptions
+	options := builder.ListOptionsBuilder().
+		Namespaces("kube-system").
+		Options()
+
+	resources, err := cc.PediaClusterV1beta1().CollectionResource().Fetch(context.TODO(), "workflows", options, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	for _, item := range resources.Items {
+		fmt.Printf("resource info: %v\n", item)
+	}
+}

examples/transport/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+
+	"github.com/clusterpedia-io/client-go/tools/transport"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	clientset "k8s.io/client-go/kubernetes"
+	ctrl "sigs.k8s.io/controller-runtime"
+)
+
+func main() {
+	config, err := ctrl.GetConfig()
+	if err != nil {
+		log.Fatalf("failed to init config: %v", err)
+	}
+	config.Wrap(func(rt http.RoundTripper) http.RoundTripper {
+		return transport.NewTransportForCluster(config.Host, "cluster", rt)
+	})
+
+	client, err := clientset.NewForConfig(config)
+	if err != nil {
+		log.Fatalf("failed to init clientset: %v", err)
+	}
+
+	pod, err := client.CoreV1().Pods("demo-system").Get(context.TODO(), "pod1", metav1.GetOptions{})
+	if err != nil {
+		log.Fatalf("failed to list pods: %v", err)
+	}
+	fmt.Println(pod)
+}