Example for getting machine hostname and all of it's IP numbers based on local devices

main.go

package main

import (
	"fmt"
	"net"
	"os"
	"strings"
)

// GetMachineInfo return a list of:
//  1. Server Name
//  2. All IP numbers based on network device
//
// If something is wrong, an error is returned instead
func GetMachineInfo() ([]string, error) {
	list := []string{}
	name, err := os.Hostname()
	if err != nil {
		return nil, err
	}
	list = append(list, name)

	ifaces, err := net.Interfaces()
	if err != nil {
		return nil, err
	}

	for _, i := range ifaces {
		addrs, err := i.Addrs()
		if err != nil {
			return nil, err
		}
		for _, addr := range addrs {
			var ip net.IP
			switch v := addr.(type) {
			case *net.IPNet:
				ip = v.IP
			case *net.IPAddr:
				ip = v.IP
			}
			list = append(list, ip.String())
		}
	}

	return list, nil
}

func main() {
	list, err := getMachineInfo()
	if err != nil {
		panic(err)
	}
	fmt.Println(strings.Join(list, ", "))
}