ingpoint

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package main
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import (
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	"context"
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	"flag"
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	"fmt"
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	"log"
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	"path/filepath"
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	"sort"
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	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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	"k8s.io/client-go/kubernetes"
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	"k8s.io/client-go/tools/clientcmd"
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	"k8s.io/client-go/util/homedir"
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)
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func main() {
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	var kubeconfig *string
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	if home := homedir.HomeDir(); home != "" {
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		kubeconfig = flag.String("kubeconfig", filepath.Join(home, ".kube", "config"), "(optional) absolute path to the kubeconfig file")
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	} else {
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		kubeconfig = flag.String("kubeconfig", "", "absolute path to the kubeconfig file")
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	}
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	flag.Parse()
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	// use the current context in kubeconfig
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	config, err := clientcmd.BuildConfigFromFlags("", *kubeconfig)
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	if err != nil {
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		panic(err.Error())
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	}
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	// create the clientset
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	clientset, err := kubernetes.NewForConfig(config)
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	if err != nil {
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		panic(err.Error())
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	}
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	// get ingresses hosts
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	ingresses, err := clientset.NetworkingV1().Ingresses("").List(context.Background(), metav1.ListOptions{})
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	if err != nil {
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		log.Fatal(err)
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	}
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	uniqueHosts := make(map[string]bool)
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	for _, ingress := range ingresses.Items {
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		for _, rule := range ingress.Spec.Rules {
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			uniqueHosts[rule.Host] = true
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		}
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	}
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	hosts := make([]string, 0, len(uniqueHosts))
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	for host := range uniqueHosts {
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		hosts = append(hosts, host)
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	}
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	sort.Strings(hosts)
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	for _, host := range hosts {
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		fmt.Println(host)
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	}
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	if len(uniqueHosts) == 0 {
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		fmt.Println("No ingress resources found")
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	}
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}
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