How to send email for failed jobs in shell scripts - linux

Question

I have a shell script. To this script I am passing arguments from a file. This file contains tables names
The script is working fine. I am able execute the command for all the tables in the file.
shell script
#!/bin/bash
[ $# -ne 1 ] && { echo "Usage : $0 input file "; exit 1; }
input_file=$1
TIMESTAMP=`date "+%Y-%m-%d"`
touch /home/$USER/logs/${TIMESTAMP}.success_log
touch /home/$USER/logs/${TIMESTAMP}.fail_log
success_logs=/home/$USER/logs/${TIMESTAMP}.success_log
failed_logs=/home/$USER/logs/${TIMESTAMP}.fail_log
#Function to get the status of the job creation
function log_status
{
status=$1
message=$2
if [ "$status" -ne 0 ]; then
echo "`date +\"%Y-%m-%d %H:%M:%S\"` [ERROR] $message [Status] $status : failed" | tee -a "${failed_logs}"
#echo "Please find the attached log file for more details"
#exit 1
else
echo "`date +\"%Y-%m-%d %H:%M:%S\"` [INFO] $message [Status] $status : success" | tee -a "${success_logs}"
fi
}
while read table ;do
sqoop job --exec $table > /home/$USER/logging/"${table}_log" 2>&1
g_STATUS=$?
log_status $g_STATUS "Sqoop job ${table}"
cp /home/$USER/logging/"${table}_log" /home/$USER/debug/`date "+%Y-%m-%d"`/logs/
done < ${input_file}
Now I want to send emails to my email address for failed jobs.
Requirements
1) Send email for each failed job i.e If `status log` has failed job for one particular table then I want email sent out saying job for that table has failed.
2) Or Send out one email for all the jobs that have failed for one input file.
Which is the best method to approach. I would like the 2nd option atleast it will reduce the no of emails to go through.
But better if I know both methods to do
edited function log_status
#Function to get the status of the job creation
function log_status
{
status=$1
message=$2
if [ "$status" -ne 0 ]; then
echo "`date +\"%Y-%m-%d %H:%M:%S\"` [ERROR] $message [Status] $status : failed" | tee -a "${failed_logs}"
mail -a mail.txt -s "This is the failed job log" user#example.com < /home/$USER/logs/${TIMESTAMP}.fail_log
#exit 1
else
echo "`date +\"%Y-%m-%d %H:%M:%S\"` [INFO] $message [Status] $status : success" | tee -a "${success_logs}"
fi
}
If I do this will I get one email for all the failed jobs.

Answer 1

Also it's possible using sendmail command:
sendmail user#example.com < email.txt
Using mail command:
mail -a mail.txt -s "This is the failed job log" user#example.com
-a is a attachment, -s is a subject
And with many attachments:
$(uuencode file1.txt file2.txt) | mailx -s "Subject" user#example.com

Answer 2

Here is a simple snippet for sending an err.log:
mail -s "stder logs for ps" "name#example.com" < err.log
This appends a subject in the first quotes and mails it to the recipient in the second set. In this case I suppose you would have a code block export the error logs via 3> to a file which I called err.log for readability. I would place the above snippet either inside of your script if you are not worried about being too vocal about the errors or neatly outside of the script if you want to be more discrete about how often you are emailing the recipient.