query_dns.go

package main

import (
	"flag"
	"fmt"
	"net"
	"os"
)

var host string

func init() {
	flag.StringVar(&host, "host", "kubernetes.default", "target host")
	flag.Parse()
}

func main() {
	ips, err := net.LookupIP(host)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Could not get IPs: %v\n", err)
		os.Exit(1)
	}
	for _, ip := range ips {
		fmt.Printf("%s. IN A %s\n", host, ip.String())
	}
}