Check Memory

Author: HandBoy

.gitignore

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+email.env

README.md

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+# Send Email utility
+This is a simple script for sending emails to an address list through the terminal. It requires a mailing list with target email addresses. 
+It also requires a `email.env` file with configuration variables. See `email.env.default` and configure values accordingly.
+
+## Usage
+Verify where python3 folder in server.
+```bash
+which python3
+```
+Set this path in first line on send-email file
+
+```
+#!/usr/bin/python3
+```
+You may want to run `pip install python-dotenv` before using it. 
+Set email.env with our gmail credentials.
+Add address in addr_list file to receive emails.
+
+```bash
+chmod +x alertmemory.sh  
+```
+
+Run comand
+
+```bash
+sudo ./alertmemory.sh 
+```

addr_list

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+[email protected]

alertmemory.sh

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+#!/bin/bash 
+#######################################################################################
+#Script Name    :alertmemory.sh
+#Description    :send alert mail when server memory is running low
+#Args           :       
+#Author         :Aaron Kili Kisinga and Hand Medeiros an Guilherme Pontess
+#Email          :[email protected] || [email protected]
+#License       : GNU GPL-3	
+#######################################################################################
+## declare mail variables
+## sudo apt-get install ssmtp
+## email subject
+## https://github.com/gpontesss/terminal-send-email
+## https://www.tecmint.com/shell-script-to-send-email-alert-when-memory-low/
+
+subject="Server Memory Status Alert"
+
+## get total free memory size in megabytes(MB) 
+free=$(free -mt | grep Mem | awk '{print $4}')
+memory=$(free -mt | grep Mem | awk '{print $2}')
+
+total_free=$((($free * 100)/ $memory))
+## If free memory is less or equals to 15%
+if [[ "$total_free" -le 15  ]]; then
+	# Send email if system memory is running low
+	if [ -e last_moment_sended_email ]; then
+		# Date 1 : last moment sended email
+		dt1=$(<last_moment_sended_email)
+		t1=`date --date="$dt1" +%s`
+		# Date 2 : Current date
+		dt2=`date +%Y-%m-%d\ %H:%M:%S`
+		t2=`date --date="$dt2" +%s`
+
+		# Compute the difference in dates in seconds
+		let "tDiff=$t2-$t1"
+		# Compute the approximate hour difference
+		let "hDiff=$tDiff/60"
+	else 
+		hDiff=61
+	fi
+
+	if [[ "$hDiff" -gt 60 ]]; then
+		ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head | ./send-email -ml addr_list -t "$subject"
+		#ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head | mail -s "$subject" [email protected]
+	    rm last_moment_sended_email
+	    echo `date +%Y-%m-%d\ %H:%M:%S` >> last_moment_sended_email		
+	fi
+fi
+
+exit 0
+
+# SSMTP
+# https://wiki.debian.org/sSMTP
+# http://www.devin.com.br/mail-via-linha-de-comando/
+# https://tecadmin.net/sendmail-to-relay-emails-through-gmail-stmp/
+# https://stackoverflow.com/questions/10359437/sendmail-how-to-configure-sendmail-on-ubuntu

email.env.default

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+SMTP_EMAIL=
+SMTP_PASSWORD=
+SMTP_HOST=smtp.gmail.com
+SMTP_PORT=465

last_moment_sended_email

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+#!/usr/bin/python3
+
+# Google reference for SMTP setup: https://support.google.com/mail/answer/7126229?visit_id=636933472854975930-1892577040&hl=pt-BR&rd=1
+
+import os, sys, json, argparse
+from dotenv import load_dotenv
+from smtplib import SMTP_SSL
+from email.message import EmailMessage
+
+def list_or_json(filename):
+	addr_list = []
+	with open(filename, "r") as addr_file:
+		file_content = addr_file.read()
+		try:
+			addr_list = json.loads(file_content)
+		except json.JSONDecodeError:
+			addr_list = file_content.split('\n')
+	return addr_list
+
+# Parsing arguments
+parser = argparse.ArgumentParser(description="Send emails via cli.")
+parser.add_argument('-b', "--body", type=argparse.FileType('r'), default=sys.stdin, metavar="body_message",
+	help="Name of file containing body message. It can also be passed through pipes to stdin.")
+parser.add_argument('-t', "--title", type=str, default="Python script email :)", metavar="email_title",
+	help="Title of the email.")
+parser.add_argument('-ml', "--mailing-list", type=list_or_json, dest="addr_list", metavar="addresses_filename",
+	help="Name of file containing mailing list. Can be a JSON list file.", required=True)
+
+args = parser.parse_args(sys.argv[1:])
+
+# Setting up environment variables
+load_dotenv('./email.env')
+
+from_addr = os.getenv("SMTP_EMAIL")
+password = os.getenv("SMTP_PASSWORD")
+host = os.getenv("SMTP_HOST")
+port = os.getenv("SMTP_PORT")
+
+# Setting email
+msg = EmailMessage()
+msg.set_content(args.body.read())
+msg['Subject'] = args.title
+msg['From'] = from_addr
+
+# Sending emails
+with SMTP_SSL(host=host, port=port) as smtp:
+	smtp.login(from_addr, password)
+
+	print("Sending email to: %s" % (args.addr_list))
+	msg['To'] = args.addr_list
+	smtp.send_message(msg)