Cron safe Mysql dB checker

checkdbs.sh

#!/bin/bash

# Provide MySql user credentials i.e. root
MYSQLUSER="root"
MYSQLPWD="MySecretPassword"

# Make the script cron safe
ID="/usr/bin/id"
MYSQLCHECK="/bin/mysqlcheck"
SYSTEMCTL="/usr/bin/systemctl"

zabbix_stopped=0

##########################
# SUBROUTINE DEFINITIONS #
##########################

cleanUp () {
  # Restart the zabbix server if we preveously stopped it
  if [ "$zabbix_stopped" -ne "0" ]; then
    echo
    echo "Starting Zabbix Server..."
    echo
    $SYSTEMCTL start zabbix-server > /dev/null 2>&1
  fi

  elapsed=$SECONDS
  echo
  echo -n "Script elapsed time was "
  printf '%dh:%dm:%ds\n' $(($elapsed/3600)) $(($elapsed%3600/60)) $(($elapsed%60))
  echo
}

trap cleanUp EXIT

#########################
# INITIAL SANITY CHECKS #
#########################

# We need to be root to run this script
if [ "$($ID -u)" -ne 0 ]; then
  echo
  echo "ERROR: This script must be run as root. Aborting..."
  echo
  exit 1
fi

# Check to see if this script has access to all the commands it needs
for CMD in set echo $ID $MYSQLCHECK $SYSTEMCTL; do
  type $CMD &> /dev/null

  if [ "$?" -ne "0" ]; then
    echo
    echo "ERROR: The script cannot find the required command \"${CMD}\"."
    echo
    exit 1
  fi
done

#####################
# BEGIN MAIN SCRIPT #
#####################

# Stop the zabbix server service while we check the databases
echo
echo "Stopping Zabbix Server..."
echo
$SYSTEMCTL stop zabbix-server > /dev/null 2>&1

if [ "$?" -eq "0" ]; then
  zabbix_stopped=1
else
  echo
  echo "WARNING: An error was returned when stopping the Zabbix server service..."
  echo
fi

# check, repair, and optimize all databases
echo
echo "Begin check and optimization of all sql databases..."
echo
$MYSQLCHECK -u${MYSQLUSER} -p${MYSQLPWD} --auto-repair -o --all-databases

if [ "$?" -eq "0" ]; then
  echo
  echo "Check and optimization complete..."
  echo
else
  echo
  echo "WARNING: An error was returned while checking all databases..."
  echo
fi