Email Notification scripts

Using mailx client:


Step1:

sudo yum install -y mailx
sudo yum install -y  shareutils (this is to install uuencode).

Step2:

Make sure, you check the status:

 sudo service postfix status

Step3:

Example:

#!/bin/bash

# Exited Status of the containernameapp

ping=$(docker ps -aq -f name=containernameapp -f status=exited)

#echo $ping

#Logs of the exited container

#docker logs "$ping" 2>&1 |tee /tmp/upo.txt  ---> T line
docker logs "$ping > /tmp/you.txt  2>&1   ----> N line 

#Email notification

if [ "$status" = "Up" ]; then echo "test mail" | mailx -s "container is running"abcs@gmail.com; else uuencode /tmp/you.txt /tmp/you.txt | cat "/tmp/you.txt"| mailx -s "docker status failed" -a "/tmp/you.txt"abcs@gmail.com ; fi

(or) 

When multiple containers are exited status:

#!/bin/bash

# Exited Status of the containernameapp
#estatus=$(docker ps -aq -f name=containernameapp -f status=exited)
docker ps -aq -f name=containernameapp -f status=exited >/tmp/you.txt
for docID in `cat /tmp/you.txt`;
do

echo "docId : $docID"
#Logs of the exited container
docker logs "$docID"  > /tmp/you.txt 2>&1

#Email notification
if [ "$status" = "Up" ]; then echo "test mail" | mailx -s "containernameapp is up and running"abcs@gmail.com; else uuencode /tmp/you.txt /tmp/you.txt | cat "/tmp/you.txt"| mailx -s "App Name: containernameapp , dockerID : $docID status exited" -a "/tmp/you.txt" abcs@gmail.com; fi
done


Note:
If you use T(using tee) line, we have to start script using:
"Sudo sh testlog.sh >/dev/null 2>&1"

If you use N (Normal line),we have to start normally:
"sudo ./testlog.sh"
Using sendmail client:

we have to install the sendmail client and start the process.

Example:

 nodes that have not checked-in in over 24 hours. 

#!/bin/bash

#Subject of the mail

echo "Subject:not checking into node“ > output.(html, txt)

#Add nodes to the body

echo -e "Servers on this list have gone 24 hours without checking in.\n" >> output.(html, txt)

echo " " >> output.(html, txt)

knife status --hide-by-mins 40 >> output.(html, txt)

#exclude unnecessary nodes

sed -n -i ‘/pinknodes!p’ output.(html, txt)

sed -n -i ‘/testnode/!p’ output.(html, txt)

#send email

/usr/sbin/sendmail -f “abcs@gmail.com” < output.(html, txt)