backup-system

#!/bin/bash -ex

BACKUP_DIR=/backup
REMOTE_BUCKET=s3://$(hostname -s).backup.$(hostname -d)

umask 077

for mode in "$@"; do
    dir="$BACKUP_DIR/$mode"
    rm -rf "$dir/" || true
    mkdir -p "$dir" && cd $dir
    case "$mode" in
        mysql)
            mysqldump --defaults-file=/root/backup.my.cnf --master-data=2 --all-databases | bzip2 > all-databases.sql.bz2
            mysqldump --defaults-file=/root/backup.my.cnf --master-data=2 mysql | bzip2 > mysql.sql.bz2
            ;;
        sys-conf)
            tar -acPf etc.tar.bz2 /etc
            tar -acPf cron.tar.bz2 /var/spool/cron
            ;;
        home)
            find /home -maxdepth 1 -mindepth 1 -type d -print0 | while read -r -d $'\0' user; do
                tar --one-file-system -acPf "$(basename "$user").tar.bz2" "$user"
            done
            ;;
        *)
            echo "Unknown backup mode $mode" >&2
            exit 1
            ;;
    esac
    s3cmd sync --rr "$dir/" "$REMOTE_BUCKET/$mode/"
done