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Disk Monitor (Python).md

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Python Script to monitor disk space and send an email in case threshold

reached(gmail as provider)

To send a message we are going to use smtplib library to dispatch it to SMTP server

**# First we are building message **


**from email.mime.text import MIMEText**  
**msg = MIMEText("Server is running out of disk space")  
msg["Subject"] = "Low disk space warning"  
msg["From"] = "[email protected]"  
msg["To"] = "[email protected]"  
msg.as_string()**  
'Content-Type: text/plain; charset="us-ascii"\nMIME-Version: 1.0\nContent-Transfer-Encoding: 7bit\nSubject: Low disk space warning\nTo: [email protected]\nFrom: [email protected]\nTo: [email protected]\n\nServer is running out of disk space'


**# To send a message we need to connect to SMTP server  
import smtplib**


**server=smtplib.SMTP("smtp.gmail.com", 587)**  
**server.ehlo()**  
(250, b'smtp.gmail.com at your service, [54.202.39.68]\nSIZE 35882577\n8BITMIME\nSTARTTLS\nENHANCEDSTATUSCODES\nPIPELINING\nCHUNKING\nSMTPUTF8')  
**server.starttls()**  
(220, b'2.0.0 Ready to start TLS')  
**server.login("gmail_username","gmail_password")**  
(235, b'2.7.0 Accepted')  
**server.sendmail("[email protected]","[email protected]",msg.as_string())**  
{}  
**server.quit()**  
(221, b'2.0.0 closing connection o76sm39310782pfi.119 - gsmtp')

In case if you are getting error like this

server.login(gmail_user, gmail_pwd)  
    File "/usr/lib/python3.4/smtplib.py", line 639, in login  
**   raise SMTPAuthenticationError(code, resp)  
   smtplib.SMTPAuthenticationError: (534, b'5.7.14 **    
   <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbtl1\n5.7.14       Li2yir27TqbRfvc02CzPqZoCqope_OQbulDzFqL-msIfsxObCTQ7TpWnbxIoAaQoPuL9ge\n5.7.14 BUgbiOqhTEPqJfb02d_L6rrdduHSxv26s_Ztg_JYYavkrqgs85IT1xZYwtbWIRE8OIvQKf\n5.7.14 xxtT7ENlZTS0Xyqnc1u4_MOrBVW8pgyNyeEgKKnKNyxce76JrsdnE1JgSQzr3pr47bL-kC\n5.7.14 XifnWXg> Please log in via your web browser and then try again.\n5.7.14 Learn more at\n5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 fl15sm17237099pdb.92 - gsmtp')

Go to this link and select Turn On

<https://www.google.com/settings/security/lesssecureapps>

Python Script to monitor disk space usage

threshold = 90  
partition = "/"


df = subprocess.Popen(["df","-h"], stdout=subprocess.PIPE)  
 for line in df.stdout:  
 splitline = line.decode().split()  
 if splitline[5] == partition:  
 if int(splitline[4][:-1]) > threshold:

Now combine both of them

import subprocess  
import smtplib  
from email.mime.text import MIMEText


threshold = 40  
partition = "/"


def report_via_email():  
 msg = MIMEText("Server running out of disk space")  
 msg["Subject"] = "Low disk space warning"  
 msg["From"] = "[email protected]"  
 msg["To"] = "[email protected]"  
 with smtplib.SMTP("smtp.gmail.com", 587) as server:  
 server.ehlo()  
 server.starttls()  
 server.login("gmail_user","gmail_password)  
 server.sendmail("[email protected]","[email protected]",msg.as_string())


def check_once():  
 df = subprocess.Popen(["df","-h"], stdout=subprocess.PIPE)  
 for line in df.stdout:  
 splitline = line.decode().split()  
 if splitline[5] == partition:  
 if int(splitline[4][:-1]) > threshold:  
 report_via_email()  
check_once()