serverbackup.sh

serverbackup.sh

######
# This script will tar up the files you define in the rsync section and send them off to S3
# It will also delete any files older that $DAYS from the bucket
# You do need s3cmd (usually available in the repo) in order for this to work
# S3cmd will work with dreamobjects but if you want b2 or rackspace you'll need to swap out that code.
# This does also log to /var/log/backup.log and /var/log/backup.err
######

 DATE=`date +%Y-%m-%d_%H-%m`
 TMPBACKUP='/backup'
 BACKUPFOLDER="${TMPBACKUP}/backup-${DATE}"
 TARFILE="backup-${DATE}.tar.gz"
 BUCKET='randomstuff'
 FOLDER='Backups'
 DAYS=5
 
 #wrap it in a function to make logging easier
 main() {
 # ------------- BEGIN ------------ #
 #Prepwork
 mkdir -p ${BACKUPFOLDER}
 
 #Sync all the files over first
 rsync -aR /usr/local/nginx/ ${BACKUPFOLDER}
 rsync -aR /usr/local/php/ ${BACKUPFOLDER}
 rsync -aR --exclude=root/tmp/ /root ${BACKUPFOLDER}
 mysqldump --all-databases > ${BACKUPFOLDER}/alldbs.sql
 
 #Then tar it up!
 tar -zcf ${TMPBACKUP}/${TARFILE} ${BACKUPFOLDER}
 
 #Upload it to s3/dreamhost
 s3cmd --no-progress put ${TMPBACKUP}/${TARFILE} s3://${BUCKET}/${FOLDER}/
 
 #Start a loop to look for backups older than $DAYS
 for backup in $(s3cmd ls s3://${BUCKET}/${FOLDER}/ | awk '{ print $4 }' | grep tar)
 do 
     if [ $(date -d "$(echo ${backup} | sed -e 's/\(.*backup-\)\(.*\)\(_.*\)/\2/g')" +%m%d%Y) -lt $(date -d "${DAYS} days ago" +%m%d%Y) ]
     then
         echo "Deleting ${backup}"
         s3cmd del ${backup}
     fi
 done
 
 #Cleanup! 
 rm -f  ${TMPBACKUP}/${TARFILE}
 rm -rf ${BACKUPFOLDER}
 # ------------- END ------------ #
 }
 
 main 1>/var/log/backup.log 2>/var/log/backup.err

Out of curiosity, why not set a retention policy through S3 itself to remove files after X days?

https://aws.amazon.com/blogs/aws/amazon-s3-object-expiration/