Export all databases that the user can access, then sync the sql files to a s3 bucket.

export-sql.sh

#!/bin/bash

USER="backup"
PASSWORD="password"
OUTPUT="/output/folder"
BUCKET="backup-bucket"

databases=`mysql -u $USER -p$PASSWORD -e "SHOW DATABASES;" | tr -d "| " | grep -v Database`

for db in $databases; do
    if [[ "$db" != "information_schema" ]] && [[ "$db" != "performance_schema" ]] && [[ "$db" != "mysql" ]] && [[ "$db" != _* ]] ; then
        echo "Dumping database: $db"
        mysqldump -u $USER -p$PASSWORD --databases $db > $OUTPUT/`date +%Y%m%d`.$db.sql
    fi
done

s3cmd sync $OUTPUT/ s3://$BUCKET/sql/