AutoBackup files to S3 with md5

auto-backup

#! /bin/bash

RESTORE_PATH=$(pwd)
BASEDIR=$(dirname "$0")
date=$(date '+%Y-%m-%dT%H-%M-%S')

LOG_FILE=".backup.log"
TEMP="./backup"
DATE_FOLDER="./$date"
DATE_FILE_S3="$date.tar.gz"
OLD_BACKUP="./backup.old.tar.gz"
NEW_BACKUP="./backup.tar.gz"

S3_PATH="backups"

info(){
    echo "[$(date '+%Y-%m-%dT%H:%M:%S')] $1"
}

rmOld(){
    if [ -f $OLD_BACKUP ]; then
        rm $OLD_BACKUP
    fi
}

rmNew(){
    if [ -f $NEW_BACKUP ]; then
        rm $NEW_BACKUP
    fi
}


createOldFromNew() {
    rmOld
    cp $NEW_BACKUP $OLD_BACKUP
    rmNew
}

cleanAll() {
    rmOld
    rmNew
}

uploadToS3() {
    /usr/local/bin/aws s3 cp $NEW_BACKUP s3://$S3_PATH/$DATE_FILE_S3 --no-progress
    info "Uploaded !"
}

backupIt() {
    info " Prepare temp folder $TEMP"
    mkdir $TEMP
    
    ########################################################################
    # Basically here you can store all things you need inside $TEMP folder #
    ########################################################################
    
    info " Taring..."
    tar --mtime='1970-01-01' --sort=name -cf - $TEMP | gzip --no-name > $NEW_BACKUP
    info " Clean temp folder $TEMP"
    rm -rf $TEMP
    info " Created new $NEW_BACKUP file"
}

somethingNew() {

    MD5_NEW=$(md5sum $NEW_BACKUP | awk '{print $1}')
    MD5_OLD=$(md5sum $OLD_BACKUP | awk '{print $1}')

    info " - New md5 $MD5_NEW"
    info " - Old md5 $MD5_OLD"

    if [ "$MD5_NEW" = "$MD5_OLD" ]; then
        info " Nothing changed"
        return 0
    else
        info " Something changed"
        return 1
    fi

}

backup() {
    case $1 in
        auto)
            if [ -f $NEW_BACKUP ]; then
                info " There is a backup file"
            else
                backupIt
            fi

            somethingNew
            something=$?
            if [ "$something" == "1" ]; then
                info " Uploading"
                uploadToS3
                createOldFromNew
            else
                info " Nothing New Cleaning files..."
                rmNew
                return 1
            fi
            ;;
        start)
            cleanAll
            backupIt
            uploadToS3
            createOldFromNew
            ;;
        force)
            cleanAll
            backupIt
            ;;
        test)
            cleanAll
            backupIt
            createOldFromNew
            backupIt
            somethingNew
            something=$?
            if [ "$something" == "1" ]; then
                info " Something New"
            else
                info " Nothing New"
                return 1
            fi
            ;;
        upload)
            if [ -f $NEW_BACKUP ]; then
                uploadToS3
                createOldFromNew
            else
                info " [Err] No backup found, run 'backup force' then run upload"
                return 1
            fi
            ;;
        *)
            info " Any setup find for this key: {auto|force|upload}"
            exit 1
    esac
}

cd $BASEDIR

exec 2>&1
{

    info "Started from $RESTORE_PATH on $BASEDIR"

    case $1 in
            backup)
                backup $2
                ;;
            *)
                info "Usage: $0 {backup}"
                exit 1

    esac

    cd $RESTORE_PATH

    info "Finished =)"

} 2>&1 | tee -a $LOG_FILE

exit 0

CronJob

0 22 * * * /root/ecosystem/auto-backup backup auto