alertswithlocktime.sh

#!/bin/bash
# Author: Igor Andrade
# 08/01/2021
# Send alerts for google chat if LDAP server are currently offline, protects agains repeated alerts.
# I was used this for a log that are stored on messages from LDAP but can be used for other things.
#
#
#########################################################################
#
# Constant Vars
datetoday=$(date -I | cut -d- -f3 | sed 's/^0//g')
catchlogs=$(egrep "(failed to bind|no available LDAP server found)" /var/log/messages | tail -1 | awk {'print $2'})
alerta="[LDAP] Erro: $(hostname) em $(date -I) Cannot Hit LDAP Server"
minutes=61
LOCKFILE=/home/LDAP-Alert/lo.lock
recents=/home/LDAP-Alert/recents.txt
messages=/var/log/messages
nduplic=$(egrep "(failed to bind|no available LDAP server found)" $messages | tail -1 | awk {'print $1,$2,$3'})
matchfile=$(egrep "(failed to bind|no available LDAP server found)" $recents | tail -1 | awk {'print $1,$2,$3'})
URL_GCHAT="\
https://chat.googleapis.com/v1/spaces/YOURURLGCHAT/messages?key=AIzaSyDdI0hCZtE6vySjMm\
-WYOURURLGCHATsHI&token=YOURURLGCHAT_4YOURURLGCHAT-YOURURLGCHAT-pYOURURLGCHATzdY7dYOURURLGCHAT"

envia_alerta()
{
curl -d '{"text": "'"$alerta"'" }' -H 'Content-Type: application/json; charset=UTF-8' "$URL_GCHAT"
egrep "(failed to bind|no available LDAP server found)" $messages | tail -1 | tee -a $recents
}

alerta_dispara()
{
if [ $datetoday -eq $catchlogs ] ; then
    if [ "$nduplic" == "$matchfile" ] ; then
        echo "This alert alredy sended"
        else
        envia_alerta
    fi  
else
    echo "Nothing Happens"
    exit 1
fi
}

lockrulez(){
if [ -f $LOCKFILE ]; then
    echo "Lockfile Exists"
    filestr=`find $LOCKFILE -mmin +$minutes -print`
    if [ "$filestr" = "" ]; then
        echo "Lockfile is $minutes minutes older, script will not proceed"
        exit 1
    else
        echo "Lockfile is older $minutes minutes..."
        rm $LOCKFILE
    fi
fi
touch $LOCKFILE
alerta_dispara
}

lockrulez