/
metrics.go
65 lines (54 loc) · 1.44 KB
/
metrics.go
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package clientgo
import (
"flag"
"log/slog"
"path/filepath"
"sync"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/util/homedir"
"k8s.io/metrics/pkg/client/clientset/versioned"
)
var (
onceMetrics sync.Once
clientsMetrics *versioned.Clientset
)
func InitClientMetrics() (*versioned.Clientset, error) {
var err error
onceMetrics.Do(func() {
clientsMetrics, err = doMetricsInit()
if err != nil {
clientsMetrics, err = doMetricsInnerInit()
slog.Debug("init out of cluster", "Error", err.Error())
if err != nil {
panic(err)
}
}
})
return clientsMetrics, err
}
func doMetricsInnerInit() (client *versioned.Clientset, err error) {
restConfig, err := rest.InClusterConfig()
if err != nil {
return client, err
}
client = versioned.NewForConfigOrDie(restConfig)
return
}
func doMetricsInit() (client *versioned.Clientset, err error) {
var kubeconfig *string
if home := homedir.HomeDir(); home != "" {
kubeconfig = flag.String("kubeconfigMetrics", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
} else {
kubeconfig = flag.String("kubeconfigMetrics", "", "absolute path to the kubeconfig file")
}
flag.Parse()
// use the current context in kubeconfig
restConfig, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
if err != nil {
return nil, err
}
// create the clientset
client = versioned.NewForConfigOrDie(restConfig)
return
}