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kubeclient.go
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kubeclient.go
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package kubeclient
import "github.com/golang/glog"
import (
"time"
"k8s.io/client-go/kubernetes"
certapi "k8s.io/client-go/kubernetes/typed/certificates/v1beta1"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
// KubeClient state for a Kubernetes client (inCluster or regular one)
type KubeClient struct {
KubeConfigPath string
clientSet *kubernetes.Clientset
certClient *certapi.CertificatesV1beta1Client
restConfig *rest.Config
}
// NewKubeClient instantiate a new Kubernetes client, pass kubeConfigPath == "" to build an InCluster client
func NewKubeClient(kubeConfigPath string) (*KubeClient, error) {
c := &KubeClient{
KubeConfigPath: kubeConfigPath,
}
err := c.build()
if err != nil {
return nil, err
}
return c, nil
}
func (k *KubeClient) buildInClusterConfig() error {
glog.V(3).Infof("Building inCluster kube-config")
kubeConfig, err := rest.InClusterConfig()
if err != nil {
glog.Errorf("Fail to build inCluster config: %v", err)
return err
}
k.restConfig = kubeConfig
return nil
}
func (k *KubeClient) buildFlagsConfig() error {
glog.V(3).Infof("Building flags kube-config with %s", k.KubeConfigPath)
kubeConfig, err := clientcmd.BuildConfigFromFlags("", k.KubeConfigPath)
if err != nil {
glog.Errorf("Fail to build flags config: %v", err)
return err
}
k.restConfig = kubeConfig
return nil
}
func (k *KubeClient) build() error {
kubeConfigFn := k.buildFlagsConfig
if k.KubeConfigPath == "" {
kubeConfigFn = k.buildInClusterConfig
}
err := kubeConfigFn()
if err != nil {
return err
}
k.restConfig.Timeout = time.Second * 10 // TODO conf this
k.clientSet, err = kubernetes.NewForConfig(k.restConfig)
if err != nil {
glog.Errorf("Cannot create clientSet: %v", err)
return err
}
k.certClient, err = certapi.NewForConfig(k.restConfig)
if err != nil {
glog.Errorf("Cannot create certificate client: %v", err)
return err
}
return nil
}
// GetKubernetesClient returns the k8s object to work with the API
func (k *KubeClient) GetKubernetesClient() *kubernetes.Clientset {
return k.clientSet
}