MySQL Replication Status Checker

checkreplication.sh

#!/bin/bash
# MySQL Replication Status Checker
# This script will run the SHOW SLAVE STATUS query on the specified server, and then report it if Last_IO_Errno or Last_SQL_Errno do not equal 0.
# Most effective when used as a cron job that runs once every minute.
# Version 0.1

# DB Info
DBHOST=localhost
USERNAME=root
PASSWORD=lolololol

# Machine's name. Change to something else if you want to.
HOSTNAME=`hostname`

# Array of email addresses to send emails to.
EMAILS=("me@myaddress.com" "dba@myaddress.com")

# Array of cellphone numbers to send SMS's to.
CELLPHONES=("0821112223")

# Run query.
sql_result=`mysql -h${DBHOST} -u${USERNAME} -p${PASSWORD} -e "SHOW SLAVE STATUS\G" | egrep "(Last_IO_Errno|Last_SQL_Errno)"`

# Do checking.
if [ `echo $sql_result | awk '{print $2}'` -ne 0 ] || [ `echo $sql_result | awk '{print $4}'` -ne 0 ]; then
    # Seems to be borked...
    for email in ${EMAILS[@]}
    do
        (echo "Warning: Replication on ${HOSTNAME} seems to be borked. DO SOMETHING!") | mailx -s "Replication Error: ${HOSTNAME}" $email
    done

    msg="Replication failure on ${HOSTNAME}. DO SOMETHING!"

    # URL Encode the SMS
    #msg="$(perl -MURI::Escape -e 'print uri_escape($ARGV[0]);' "${msg}")"
    msg="$(python -c "import sys; import urllib; print urllib.quote_plus(sys.argv[1]);" "${msg}")"
    for cell in ${CELLPHONES[@]}
    do
        # Use e.g. cUrl to consume some service that sends SMSs.
    done
fi

exit 0