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Nix

{ config, ... }:
let
user = "u499466";
host = "${user}.your-storagebox.de";
port = 23;
# Run this from the hetzner network
# ssh-keyscan -p 23 <host>
# and update `storagebox-xxx-knowHost` variables
storagebox-ed25519-knowHost = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIICf9svRenC/PLKIL9nk6K/pxQgoiFC41wTNvoIncOxs";
storagebox-ecdsa-knowHost = "ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAGK0po6usux4Qv2d8zKZN1dDvbWjxKkGsx7XwFdSUCnF19Q8psHEUWR7C/LtSQ5crU/g+tQVRBtSgoUcE8T+FWp5wBxKvWG2X9gD+s9/4zRmDeSJR77W6gSA/+hpOZoSE+4KgNdnbYSNtbZH/dN74EG7GLb/gcIpbUUzPNXpfKl7mQitw==";
storagebox-rsa-knowHost = "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5EB5p/5Hp3hGW1oHok+PIOH9Pbn7cnUiGmUEBrCVjnAw+HrKyN8bYVV0dIGllswYXwkG/+bgiBlE6IVIBAq+JwVWu1Sss3KarHY3OvFJUXZoZyRRg/Gc/+LRCE7lyKpwWQ70dbelGRyyJFH36eNv6ySXoUYtGkwlU5IVaHPApOxe4LHPZa/qhSRbPo2hwoh0orCtgejRebNtW5nlx00DNFgsvn8Svz2cIYLxsPVzKgUxs8Zxsxgn+Q/UvR7uq4AbAhyBMLxv7DjJ1pc7PJocuTno2Rw9uMZi1gkjbnmiOh6TTXIEWbnroyIhwc8555uto9melEUmWNQ+C+PwAK+MPw==";
in
{
# Manual borgbackup configuration (not using clanModule)
# 100GB storagebox is under the nix-community hetzner account
clan.core.state.system.folders = [
"/home"
"/var"
"/root"
];
services.borgbackup.jobs.${config.networking.hostName} = {
repo = "${user}@${host}:/./borgbackup";
encryption = {
mode = "repokey-blake2";
passCommand = "cat ${config.sops.secrets.hetzner-borgbackup-passphrase.path}";
};
environment.BORG_RSH = "ssh -oPort=23 -i ${config.sops.secrets.hetzner-borgbackup-ssh.path}";
paths = [
"/home"
"/var"
"/root"
];
exclude = [
"*.pyc"
"/var/lib/containers"
"/var/lib/buildbot-worker/"
"/var/lib/private/gitea-runner/"
"/root/*/.direnv"
"/root/*/.cache"
"/root/*/.cargo"
"/root/*/.npm"
"/root/*/.m2"
"/root/*/.gradle"
"/root/*/.opam"
"/home/*/.clangd"
"/home/*/.direnv"
"/home/*/.cache"
"/home/*/.cargo"
"/home/*/.npm"
"/home/*/.m2"
"/home/*/.gradle"
"/home/*/.opam"
"/home/*/.clangd"
"/var/lib/containerd"
# already included in database backup
"/var/lib/postgresql"
# not so important
"/var/lib/docker/"
"/var/log/journal"
"/var/cache"
"/var/tmp"
"/var/log"
];
# Disaster recovery:
# get the backup passphrase and ssh key from the sops and store them in /tmp
# $ export BORG_PASSCOMMAND='cat /tmp/hetzner-borgbackup-passphrase'
# $ export BORG_REPO='u359378@u359378.your-storagebox.de:/./borgbackup'
# $ export BORG_RSH='ssh -oPort=23 -i /tmp/hetzner-borgbackup-ssh'
# $ borg list
# web01-clan-lol-2023-07-21T14:12:22 Fri, 2023-07-21 14:12:27 [539b1037669ffd0d3f50020f439bbe2881b7234910e405eafc333125383351bc]
# $ borg mount u359378@u359378.your-storagebox.de:/./borgbackup::web01-clan-lol-2023-07-21T14:12:22 /tmp/backup
# Also enable ssh support in the storagebox web interface.
# By default the storage box is only accessible from the hetzner network, but you can temporarily enable ssh access from the internet.
# $ sops -d vars/per-machine/web01/secrets.yaml | yq '.borgbackup-ssh' > /tmp/borgbackup-ssh && chmod 600 /tmp/borgbackup-ssh
# $ sops -d vars/per-machine/web01/secrets.yaml | yq '.borgbackup-ssh-pub' | ssh -p23 u359378@u359378.your-storagebox.de install-ssh-key
preHook = ''
set -x
'';
postHook = ''
cat > /var/log/telegraf/borgbackup-clan-lol <<EOF
task,frequency=daily last_run=$(date +%s)i,state="$([[ $exitStatus == 0 ]] && echo ok || echo fail)"
EOF
'';
startAt = "daily";
persistentTimer = true;
};
systemd.services."borgbackup-job-${config.networking.hostName}".serviceConfig.ReadWritePaths = [
"/var/log/telegraf"
];
programs.ssh.knownHosts = {
storagebox-ed25519.hostNames = [ "[${host}]:${toString port}" ];
storagebox-ed25519.publicKey = storagebox-ed25519-knowHost;
storagebox-ecdsa.hostNames = [ "[${host}]:${toString port}" ];
storagebox-ecdsa.publicKey = storagebox-ecdsa-knowHost;
storagebox-rsa.hostNames = [ "[${host}]:${toString port}" ];
storagebox-rsa.publicKey = storagebox-rsa-knowHost;
};
}