aws backup script

This is a robust script that backups all instances that have a TAG, Backup=TRUE
it generates a AMI images, and snapshots of each Volume, also a nice e-mail with a HTML table nice format.
It also prints a BackupExpiration TAG, so a purge script can latter remove AMI and snapshots older then BackupExpiration. This way we keep only the last 10 days.
Here is the code:

#!/bin/bash
#
# Script que realiza o backup dos servidores virtuais na Amazon
#
# 2015-05-14 Salgadinho - original version
# 2015-06-23 Felipe Ferreira - simplify code and better output
#Pre-Req:
#INSTANCES AND VOLUMES WITH TAGs: Project,Name,Backup(TRUE/FALSE)
#ec2addtag command
#sendEmail.pl https://github.com/mogaal/sendemail put it on /usr/bin/sendEmail
#aws cli 1.7.X (minimal)
#Attention on the log directory structure
export AWS_SECRET_KEY=
export AWS_ACCESS_KEY=
export PATH=$PATH:/home/amzadm/ec2-api-tools/bin:$JAVA_HOME/bin:~/bin:$PATH
#day=$(date +%Y%m%d_%H%M%S)
day=$(date +%Y%m%d)
dayWeek=$(date "+%A")
dayMonth=$(date "+%d")
LST="/home/amzadm/scripts/lst"
LOG="/var/log/aws/createImage_$day.log"
CSV="/var/log/aws/informe.csv"
BODY_HTML="/var/log/aws/informe.html"
COUNT_V=0
COUNT_I=0
FROM="backup_aws@mydomain.com"
EMAILS="felipe.ferreira@mydomain.com"
schedule="Backup Daily"
# if need more then 10 days retention change bellow
backupExpiration=$(date +%Y%m%d -d "10 day")
TAG="Backup"
DEBUG=1
#set -x #if need more Debug
############################################################################################
pt () {
	if [ -z $DEBUG ];then
	 echo -e "$1" >> $LOG
	else
	  echo -e "$1" |tee -a $LOG
	fi
}
function sendemail() {
# ENVIA EMAIL COM INFORME
 echo "" > $BODY_HTML
 STYLE="
  "
 echo $STYLE >> $BODY_HTML
  echo "$BODY_HTML"
# echo "Total de "
 echo "A tabela e referente ao backup de hoje 
" >> $BODY_HTML
 #Cria HTML e coloca no body do email
 (echo "" ; while read INPUT ; do echo "" ; done < $CSV ; echo "
${INPUT//;/
}
") >> $BODY_HTML
 echo -e "$ERR_LIST" >> $BODY_HTML
 echo "
" >> $BODY_HTML
 echo "
" >> $BODY_HTML
 echo "

Atenciosamente,
Infra-Básica" >> $BODY_HTML
 # ENVIA O EMAIL HTML COM TABELA DE RESULTADOS VINDA DO INFOTBC1
 echo "$BODY_HTML"
 CMD="/usr/bin/sendEmail  -f "$FROM" -t "$EMAILS" -o message-content-type=html -u '$SUBJECT' -o message-file=${BODY_HTML} -a $LOG"
 echo $CMD
 $CMD
 echo $?
 if [ $? -eq 0 ];then
    echo "OK - Email enviado com sucesso a $EMAIL"
    E=0
 else
    echo "ERROR - email a $EMAIL nao foi enviado corretamente"
    E=2
 fi
}
###############################################################################################
############### MAIN ###################
#apaga arquivos
if [ -f $LST ]; then
 rm $LST
fi
if [ -f $LOG ]; then
 rm -f $LOG
fi
#Criando lista de instancias para criacao de imagens
LIST=`aws ec2 describe-instances --filter Name=tag:$TAG,Values=TRUE --query 'Reservations[*].Instances[*].InstanceId'`
if  [ -z $LIST  ]; then
 echo "CRITICAL - lista vazia $LIST , nenhum backup a ser feito"
 #exit 2
fi
        pt "\n $(date +%Y%m%d_%H-%M-%S) -- Listando instancias para criacao de imagens \n"
	echo -e "\t Instance \t; Volume \t; Project " > $CSV
        #Gerando script de images
        for instance in $(echo $LIST);
#cria imagem, nomeia e gera lista
        do
               instanceName=$(aws ec2 describe-instances --instance-ids $instance --query 'Reservations[].Instances[].Tags[?Key==`Name`].Value')
	#CREATING IMAGE
		pt "Cirando imagem $instanceName da instancia $instance"
                exec_imageid='aws ec2 create-image --instance "'"$instance"'" --name "'"img_${instanceName}_${day}"'" --no-reboot --description "'"$schedule -- $instanceName"'"'
		#pt "Commando: $exec_imageid"
		imageid=`eval $exec_imageid`
		if [ -z $imageid ]; then
			pt "ERROR - $Exec_imageid nao foi possivel criar imagem do $instanceName"
			#exit 2
                else
			pt "OK - imagem do $instanceName criada com sucesso, imagemID $imageid "
			sleep 2
#Nomeando a Imagem
			amiName=$(aws ec2 describe-images --image-ids $imageid --query 'Images[*].[Name]')
			pt "amiName = $amiName"
			if [ -z $amiName ]; then
				pt "ERROR - Nao foi possivel encontrar a $imageid!"
				#exit 2
			fi
                        exec_tag='ec2addtag "'"$imageid"'" -t Name="'"$amiName"'" -t Schedule="'"$schedule"'" -t BackupExpiration="'"$backupExpiration"'"'
			tag=`eval $exec_tag`
			#pt "Commando: $exec_tag \n $tag"
#Gerando Lista de SnapIds e salvando no arquivo
			exec_snaplst="aws ec2 describe-images --image-ids $imageid --region us-east-1 --output text --query 'Images[*].BlockDeviceMappings[*].Ebs.SnapshotId' | sed -e "'"y/\t/\n/"'" >> $LST/createSnapid_${day}.lst"
			#pt "Comando: $exec_snaplst"
			snaplst=`eval $exec_snaplst`
			pt $snaplst
			COUNT_I=`expr $COUNT_I + 1`
		fi
	done
		if [ -f "$LST/createSnapid_${day}.lst" ]; then
#Nomeando snapshots da imagem
	                for snapid in $(cat $LST/createSnapid_$day.lst);
        	        do
                	        volume=$(aws ec2 describe-snapshots --snapshot-id $snapid --query 'Snapshots[*].VolumeId')
                        	partition=snap_$(aws ec2 describe-volumes --volume-ids $volume --query 'Volumes[].Tags[?Key==`Name`].Value')
				project=$(aws ec2 describe-volumes --volume-ids $volume --query 'Volumes[].Tags[?Key==`Project`].Value')
				pt "Tageando snapshot $snapid - Volume $volume - Name $partition - project $project"
				exec_tag='ec2addtag "'"$snapid"'" -t Name="'"$partition"'" -t Project="'"$project"'"'
	                        tag=`eval $exec_tag`
         	                #pt "Commando: $exec_tag \n $tag"
				P=`echo $partition|awk -F"_" '{ print $NF}'`
				N=`echo $partition|awk -F"_" '{ print $2}'`
				echo -e "\t $N \t; $P \t; $project " >> $CSV
				COUNT_V=`expr $COUNT_V + 1`
                	done
			pt "\n---------------------------------------------------------------------------------------------------\n"
		else
			pt "ERROR - arquivo com lsita de imagens inexistente $LST/createSnapid_$day.lst , AMI criado mas snapshots nao"
		fi
rm -f "$LST/createSnapid_${day}.lst"
#CHECK LOG FOR ANY ERROR
sed -i 's/ERROR/\ERROR/g' $LOG
ERR_LIST=`grep ERROR $LOG`
pt "\n $(date +%Y%m%d_%H-%M-%S) -- Backup realizado com sucesso de $COUNT_I imagens e $COUNT_V volumes \n"
if [ $COUNT_I -eq 0 ] || [ $COUNT_V -eq 0 ]; then
	SUBJECT="Backup AWS FALHOU"
	sendemail
	exit 2
fi
SUBJECT="Backup AWS $COUNT_I instancias e $COUNT_V Volumes"
sendemail
exit 0