Automatically backup your OpenWRT router configuration to a local tarball under ~/Backups

backup-mainrouter.lan

#!/usr/bin/env bash

# script based on instructions from:
# https://openwrt.org/docs/guide-user/troubleshooting/backup_restore

router_hostname=mainrouter.lan

# Generate/update backup
ssh "$router_hostname" 'umask go=; sysupgrade -b /tmp/backup-${HOSTNAME}-$(date +%F).tar.gz'


# Download backup
mkdir -p ~/Backups/"$router_hostname"
scp root@"$router_hostname":/tmp/backup-*.tar.gz ~/Backups/"$router_hostname"

Thanks for sharing your script.

I ended up avoiding the scp altogether:

backup_file="/somewhere/backup-$hostname-$(date +%F).tar.gz"
echo "Creating $backup_file"
ssh -q root@$hostname "sysupgrade -b -" > "$backup_file"

The "-" tells sysupgrade to send to stdout and then I just pipe the output to the final file location.
From sysupgrade --help:

        -b | --create-backup <file>
                     create .tar.gz of files specified in sysupgrade.conf
                     then exit. Does not flash an image. If file is '-',
                     i.e. stdout, verbosity is set to 0 (i.e. quiet).

Cheers

@jstrot

Yes, that's definitely much better. Good catch!