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healthCheck.go
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healthCheck.go
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package healthCheck
import (
"encoding/json"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
"log"
"net/http"
)
type Kube struct {
kubeconfig *string
}
type Status struct {
Status string
}
func (k *Kube) checkDefaultNamespace(w http.ResponseWriter, r *http.Request) {
config, err := clientcmd.BuildConfigFromFlags("", *k.kubeconfig)
s := Status{"unavailable"}
if err != nil {
s.Status = "unavailable"
} else {
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
s.Status = "unavailable"
} else {
_, err = clientset.CoreV1().Namespaces().Get("default", metav1.GetOptions{})
if err != nil {
s.Status = "unavailable"
} else {
s.Status = "available"
}
}
}
js, err := json.Marshal(s)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(js)
}
func HealthCheck(kubeconfig *string) {
kube := Kube{kubeconfig: kubeconfig}
http.HandleFunc("/health", kube.checkDefaultNamespace)
log.Fatal(http.ListenAndServe(":8080", nil))
}