Golang : How to setup a disk space used monitoring service with Telegram bot
Ok, writing this simple example for a friend. She wants to create a simple Telegram notification/alert for her company's system administrator to use. Basically, this is a simple program that will check a server's disk used percentage every 15 seconds.
If the disk usage percentage exceeded a threshold, start notifying the system administrator via Telegram message.
To get this program to run, you will need to supply your own Telegram Bot token
and chat ID
.
Here you go!
package main
import (
"fmt"
"log"
"strconv"
"time"
"github.com/shirou/gopsutil/disk"
tgbotapi "gopkg.in/telegram-bot-api.v4"
)
func main() {
telegramBotToken := ""
telegramChatID := ""
fmt.Println("Telegram configurations")
fmt.Println("BotToken : ", telegramBotToken)
fmt.Println("ChatID : ", telegramChatID)
bot, err := tgbotapi.NewBotAPI(telegramBotToken)
if err != nil {
log.Println(err)
} else {
log.Printf("Telegram authorized on account %s with chat ID %s\n", bot.Self.UserName, telegramChatID)
log.Println("Type /help in your Telegram app to see the available commands.", bot.Self.UserName, telegramChatID)
}
telegramChatID64, _ := strconv.ParseInt(telegramChatID, 10, 64) // use base 10 for sanity
msg := tgbotapi.NewMessage(telegramChatID64, "Disk usage monitor Bot started!")
msg.ParseMode = "markdown"
bot.Send(msg)
go diskUsageMonitor(bot, telegramChatID64)
select {} // cause this program to run forever until termination
}
func diskUsageMonitor(bot *tgbotapi.BotAPI, telegramChatID64 int64) {
diskStat, err := disk.Usage("/")
if err != nil {
log.Println(err)
}
sizeGB := 1 << (10 * 3)
counter := time.Tick(time.Duration(15) * time.Second) // poll every 15 seconds
for range counter {
total := float64(diskStat.Total) / float64(sizeGB)
used := float64(diskStat.Used) / float64(sizeGB)
free := float64(diskStat.Free) / float64(sizeGB)
log.Printf("Total disk space : %s bytes or %.2f GB\n", strconv.FormatUint(diskStat.Total, 10), total)
log.Printf("Used disk space : %s bytes or %.2f GB\n", strconv.FormatUint(diskStat.Used, 10), used)
log.Printf("Free disk space : %s bytes or %.2f GB\n", strconv.FormatUint(diskStat.Free, 10), free)
log.Println("Pecentage of disk space used : ", strconv.FormatFloat(diskStat.UsedPercent, 'f', 2, 64), "%")
if diskStat.UsedPercent > 60.0 { // harcoded here, you probably might want to make it adjustable from a config file.
data := "Pecentage of disk space used : " + strconv.FormatFloat(diskStat.UsedPercent, 'f', 2, 64) + "%"
msg := tgbotapi.NewMessage(telegramChatID64, data)
msg.ParseMode = "markdown"
bot.Send(msg)
}
}
}
References :
See also : Golang : Get hardware information such as disk, memory and CPU usage
By Adam Ng(黃武俊)
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