Channels backup on Umbrel

This is a collection of scripts for backing up all necessary on your Umbrel install. Initial script from Alex Bosworth, I decided to extend the copy on a remote cifs share and for all the important files. Forked, rearranged and completed from Alex Bosworth

So three different monitoring enabled because of different update times each one has.

Install

Requirements

sudo apt-get update
sudo apt-get install inotify-tools

Installation

Clone the repo to the home of the umbrel user. Then cd the safechannels directory and run the following commands:

Copy backup-channel service

sudo cp backup-channels.service /etc/systemd/system/
sudo chmod +x /etc/systemd/system/backup-channels.service

Copy backup-walletdb service

sudo cp backup-walletdb.service /etc/systemd/system/
sudo chmod +x /etc/systemd/system/backup-walletdb.service

now reload the systemd daemon

sudo systemctl daemon-reload

Mount the backup destination at /mnt/backup, you can user an USB stick or a network drive.

To mount the usb stick run:

sudo mount /dev/sdb1 /mnt/backup

Replace /dev/sdb1 with your USB partition name. Find the correct partition name using sudo fdisk -l

Change the owner:

sudo chown umbrel. /mnt/backup

Now start the services

sudo systemctl start backup-channels.service 
sudo systemctl start backup-walletdb.service 

Note: the backup-walletdb.sh script is backupping also lnbits database. In case you dont have lnbits you can choose to comment the command. Note: before running the script be sure that backup partition is mounted and umbrel services are running

Checks

To check if the service are working you can force the backup by simulating an access to the files:

# Example:

# Wallet file
touch -c -a umbrel/app-data/lightning/data/lnd/data/chain/bitcoin/mainnet/wallet.db

touch -c -a umbrel/app-data/lightning/data/lnd/data/chain/bitcoin/mainnet/channel.backup

To check if the backups are ok, just run

./check.sh

inside the safechannel dir. There is a sha256 hash checksum check on files

Notes

1. Tested on 0.5 version of Umbrel
2. This is a script not meant for newbies. Doing errors on channels backup is very risky. be sure to know what you are doing, otherwise do not use it. We carry no liability on whatever use you do of this script
3. Do not use on a local partition, it would make no sense. Connect an external device and mount it on /mnt/backup