Delete a snapshot of AWS EBS volume

delete_snapshot.sh

#!/bin/bash

########

        # Purpose :- To delete  Automatic snapshot of  AWS EBS volume
        # Requirement :- Make Sure snapshot.config file is present in /data/backup/
        # format for Collection.config is VOLMEID000
        # For example 
        # vol-a994fff3
        # vol-a994fTT4
        # Provide your Access and Secret Key also check your Region 
        # Bug Report to :- jadhav.nitin941@gmail.com
########




export JAVA_HOME=/usr/java/jdk1.7.0_04/
export EC2_HOME=/usr/bin/ec2/
export AWS_ACCESS_KEY=*************************
export AWS_SECRET_KEY=******************************
export EC2_URL=https://ec2.us-east-1.amazonaws.com
export PATH=/usr/bin/ec2/bin/:$EC2_HOME:$JAVA_HOME:$PATH



DATE=$(date +%F)
CONFIG_FILE="/data/backup/snapshot.config"
DAYS_COUNT=2
BACKUP_DIR="/data/backup"
SNAPSHOT_DEL_DATE=$(date --date " ${DATE} ${DAYS_COUNT} days ago " +%F)
PROGNAME=$(basename $0)
BOX=$(uname -n)
LOGDIR="${BACKUP_DIR}/log/"
LOGFILE="DELETE_SNAPSHOT_${DATE}.log"
LOCKFILE="/tmp/${PROGNAME}.lock"
DELETE_DATE=$(date --date "${DAYS_COUNT} days ago" +%F)
MAILTO="jadhav.nitin941@gmail.com"

# Define custom variables

LOCK_FILE ()
{
        if [ "$1" = "create" ]; then
                if [ -f $LOCKFILE ]; then
                        SEND_EXIT_MAIL "ERROR ::" "Unable to create lock may lock file not removed"
                else
                touch $LOCKFILE
                fi
        fi
        if [ "$1" = "remove" ]; then
                rm -fr $LOCKFILE
                exit 0 
        fi
}



DEFINE_VARIABLE ()
{
        VOLUME=$(echo $SNAPSHOT | cut -d"|" -f1)
        SNAPSHOT_CREATION_DATE=$(date +%Y_%m_%d_%H)
}

# validation of custom variables 

CHECK_VARIABLE ()
{
        if [ -z "${VOLUME}" ];then
                SEND_EXIT_MAIL "ERROR ::" "check your configration in snapshot.config Vaiables is blank" 
                exit
        fi
                if [ -z "${DISCRIPTION}" ];then
                        DISCRIPTION=$(echo "snap-${VOLUME}")
                fi

}


SEND_EXIT_MAIL ()
{
        mail -s "${BOX} :: ${PROGNAME} : $1 $2"   -t $MAILTO < $LOGDIR/$LOGFILE
        LOCK_FILE "remove"
        exit 1
}

SEND_MAIL ()
{
        mail -s "${BOX} :: ${PROGNAME} : $1 $2"   -t $MAILTO < $LOGDIR/$LOGFILE
}


LOCK_FILE "create"
touch $LOGDIR/$LOGFILE
echo "Script started at :- $(date)" 1>> $LOGDIR/$LOGFILE 2>> $LOGDIR/$LOGFILE

for dir in "${BACKUP_DIR}" "${LOGDIR}"

do
        if [ ! -d "${dir}" ]; then
                mkdir -p ${dir} 1>/dev/null 2>/dev/null
                        if [ $? -ne 0 ]; then
                                SEND_EXIT_MAIL "ERROR::" "Unable to Create ${dir} Directory :"
                        fi
        fi
done

if [ ! -f "${CONFIG_FILE}" ]; then
        SEND_EXIT_MAIL "ERROR::" " SNAPSHOT Config file is not Present :"
else
        if [ ! -s "${CONFIG_FILE}" ]; then
        SEND_EXIT_MAIL "ERROR ::" " SNAPSHOT Config file is ZERO byte"
        fi

                 


## Snapshot Retention Logic starts 
                echo "|" "SNAPSHOT-NAME" "|""DELELTE-DATE""|""STATUS" "|" 1>> $LOGDIR/$LOGFILE 2>> $LOGDIR/$LOGFILE
                echo "======================================" 1>> $LOGDIR/$LOGFILE 2>> $LOGDIR/$LOGFILE
                        for VOL_SNAP_DELTE in $(cat ${CONFIG_FILE})

                        do
                                SNAPSHOT_DEL_LIST=$(ec2-describe-snapshots | grep snap-${VOL_SNAP_DELTE}_${DELETE_DATE} | awk '/^SNAPSHOT/ {print $2}')
                                for DELETE_SNAP in ${SNAPSHOT_DEL_LIST}
                                do
                                ec2-describe-snapshots $DELETE_SNAP 1>> $LOGDIR/$LOGFILE 2>> $LOGDIR/$LOGFILE

                                done
                        done
                                    echo "Script ended at :- $(date)" 1>> $LOGDIR/$LOGFILE 2>> $LOGDIR/$LOGFILE
                                    SEND_MAIL "" "Snapshot script details  "
                                    LOCK_FILE "remove"

fi