#!/bin/sh
# Owen Mcshane 25/01/11
# A. Forti Modified 03/04/2011 Using ldapsearch instead of netstat to detect when the process exist but is not responsive instead of being dead
# A. Forti Modified 30/10/2011 Added check on freshness and changed how the presence of the proc is detected to take slapd2.4 and slapd into account

sendalert(){

    subject=$1
    body=$2

    #echo $subject $body
    sendEmail -f root@tier2.hep.manchester.ac.uk -u $subject -m $body -t ops@tier2.hep.manchester.ac.uk -s mercury 2>1 > /dev/null
} 

########
# Main #
########

# Get the local machine hostname
hn=`hostname -s`

# Check if the bdii is responsive and get the last time stamp

now=`date +%s`;
time_stamp=`(ldapsearch -xLLL -b CompressionType=zip,o=infosys -p 2170 -h $hn modifyTimestamp|grep mod|cut -c26-31| perl -ne 'if (/(\d\d)(\d\d)(\d\d)/) { print "$1:$2:$3\n" }') 2> /dev/null`

# If it isn't
if [ -z "$time_stamp" ]; then 
    
    proc=`ps ax o fname|grep slapd`

    if [ -n "$proc" ]; then 
	
        # Check if there is a slapd process, processes might be still running but they might not be responsive
	sendalert "slapd exist but not responding on $hn" "Restarted bdii service on $hn"
    
    else

	# if there are no processes running just start the bdii
	sendalert "slapd died on $hn" "Restarted bdii service on $hn"
    fi

    /sbin/service bdii restart

else

    ldap=`date -d "$time_stamp" +%s`;
    diff=$(($now-$ldap)); 
    echo $diff tt

    if [ $diff -gt 900 ]; then
	
	# if the modify date is older than 15 mins restart the bdii
	sendalert "bdii freshness is more than 900s old on $hn" "Restarted bdii service on $hn"

	/sbin/service bdii restart
    fi
fi