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client.go
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client.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 k8s
import (
netdefclient "github.com/k8snetworkplumbingwg/network-attachment-definition-client/pkg/client/clientset/versioned/typed/k8s.cni.cncf.io/v1"
apiextensionclientset "k8s.io/apiextensions-apiserver/pkg/client/clientset/clientset"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
componentbaseconfig "k8s.io/component-base/config"
"k8s.io/klog/v2"
aggregatorclientset "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
mcclientset "antrea.io/antrea/multicluster/pkg/client/clientset/versioned"
crdclientset "antrea.io/antrea/pkg/client/clientset/versioned"
)
// CreateClients creates kube clients from the given config.
func CreateClients(config componentbaseconfig.ClientConnectionConfiguration, kubeAPIServerOverride string) (
clientset.Interface, aggregatorclientset.Interface, crdclientset.Interface, apiextensionclientset.Interface, mcclientset.Interface, error) {
kubeConfig, err := createRestConfig(config, kubeAPIServerOverride)
if err != nil {
return nil, nil, nil, nil, nil, err
}
client, err := clientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, nil, nil, nil, err
}
aggregatorClient, err := aggregatorclientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, nil, nil, nil, err
}
// Create client for CRD operations.
crdClient, err := crdclientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, nil, nil, nil, err
}
// Create client for CRD manipulations.
apiExtensionClient, err := apiextensionclientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, nil, nil, nil, err
}
// Create client for multicluster CRD operations.
mcClient, err := mcclientset.NewForConfig(kubeConfig)
if err != nil {
return nil, nil, nil, nil, nil, err
}
return client, aggregatorClient, crdClient, apiExtensionClient, mcClient, nil
}
// CreateNetworkAttachDefClient creates net-attach-def client handle from the given config.
func CreateNetworkAttachDefClient(config componentbaseconfig.ClientConnectionConfiguration, kubeAPIServerOverride string) (netdefclient.K8sCniCncfIoV1Interface, error) {
kubeConfig, err := createRestConfig(config, kubeAPIServerOverride)
if err != nil {
return nil, err
}
netAttachDefClient, err := netdefclient.NewForConfig(kubeConfig)
if err != nil {
return nil, err
}
return netAttachDefClient, nil
}
func createRestConfig(config componentbaseconfig.ClientConnectionConfiguration, kubeAPIServerOverride string) (*rest.Config, error) {
var kubeConfig *rest.Config
var err error
if len(config.Kubeconfig) == 0 {
klog.Info("No kubeconfig file was specified. Falling back to in-cluster config")
kubeConfig, err = rest.InClusterConfig()
} else {
kubeConfig, err = clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
&clientcmd.ClientConfigLoadingRules{ExplicitPath: config.Kubeconfig},
&clientcmd.ConfigOverrides{}).ClientConfig()
}
if len(kubeAPIServerOverride) != 0 {
kubeConfig.Host = kubeAPIServerOverride
}
if err != nil {
return nil, err
}
kubeConfig.AcceptContentTypes = config.AcceptContentTypes
kubeConfig.ContentType = config.ContentType
kubeConfig.QPS = config.QPS
kubeConfig.Burst = int(config.Burst)
return kubeConfig, nil
}