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kube.go
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kube.go
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package kube
import (
"fmt"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
var kubeClient kubernetes.Interface
// GetKubeClient creates a Kubernetes config and client for a given kubeconfig context.
func GetKubeClient(context string) (kubernetes.Interface, error) {
if kubeClient != nil {
return kubeClient, nil
}
config, err := configForContext(context)
if err != nil {
return nil, err
}
client, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, fmt.Errorf("could not get Kubernetes client: %s", err)
}
kubeClient = client
return client, nil
}
// configForContext creates a Kubernetes REST client configuration for a given kubeconfig context.
func configForContext(context string) (*rest.Config, error) {
config, err := getConfig(context).ClientConfig()
if err != nil {
return nil, fmt.Errorf("could not get Kubernetes config for context %q: %s", context, err)
}
return config, nil
}
// getConfig returns a Kubernetes client config for a given context.
func getConfig(context string) clientcmd.ClientConfig {
rules := clientcmd.NewDefaultClientConfigLoadingRules()
rules.DefaultClientConfig = &clientcmd.DefaultClientConfig
overrides := &clientcmd.ConfigOverrides{ClusterDefaults: clientcmd.ClusterDefaults}
if context != "" {
overrides.CurrentContext = context
}
return clientcmd.NewNonInteractiveDeferredLoadingClientConfig(rules, overrides)
}