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Blog / SysAdmin / Backup computers with Duplicity over FTP

Setup FTP

on the server:

apt install vsftpd
mkdir /etc/vsftpd_user_conf

You need to ack a bit the configuration file for systemd: enable write and chroots. Get

/etc/vsftpd.conf
/etc/vsftpd.chroot_list
/etc/vsftpd_user_conf

from a backup.

on the clients:

apt install lftp

Add users

For each machine, here web01 as an example:

on the server

addgroup --gid=1010 backup-web01
addgroup --gid=1011 backup-web02
addgroup --gid=1012 backup-spin
adduser --uid=1008 --gid=1010 --home=/data/backup/web01Backup backup-web01
adduser --uid=1009 --gid=1011 --home=/data/backup/web02Backup backup-web02
adduser --uid=1010 --gid=1012 --home=/data/backup/spinBackup backup-spin

and for each user, change the pwd via the usual vault:

chpasswd
backup-web01:YOURSTRONGFTPPWD
ˆD

Setup dirs:

mkdir -p /data/backup/web01Backup
chmod 500 /data/backup/web01Backup

and for each directory you want to backup:

mkdir -p /data/backup/web01Backup/etc
mkdir -p /data/backup/web01Backup/home
mkdir -p /data/backup/web01Backup/scripts
chown -R backup-web01:backup-web01 /data/backup/web01Backup

Setup DUPLICITY

On each client that you want to backup:

apt install duplicity

and then add a script:

#!/bin/sh

export PASSPHRASE=YOUR_STRONG_BACKUP_PWD
export FTP_PASSWORD=YOUR_STRONG_FTP_PWD
duplicity /etc ftp://backup-web01@server/etc
duplicity \
    --exclude /home/pierre/tmp \
    --exclude /home/pierre/snap \
    --exclude /home/pierre/ray \
    /home/pierre \
    ftp://backup-web01@server/home
unset PASSPHRASE
unset FTP_PASSWORD

note that server need to be replaced by an ip.

Add a crontab

crontab -e

0 5 * * 1 cd /home/pierre && ./backup.sh

Restore

cd /data/backup/backupMachine
mkdir restore-etc
duplicity restore file:///data/backup/backupMachine/etc ./restore-etc