clan-infra/modules/web01/borgbackup.nix

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{ config, ... }: {
# 100GB storagebox is under the nix-community hetzner account
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systemd.services.borgbackup-job-clan-lol.serviceConfig.ReadWritePaths = [
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"/var/log/telegraf"
];
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# Run this from the hetzner network:
# ssh-keyscan -p 23 u359378.your-storagebox.de
programs.ssh.knownHosts = {
storagebox-ecdsa.hostNames = [ "[u359378.your-storagebox.de]:23" ];
storagebox-ecdsa.publicKey = "ecdsa-sha2-nistp521 AAAAE2VjZHNhLXNoYTItbmlzdHA1MjEAAAAIbmlzdHA1MjEAAACFBAGK0po6usux4Qv2d8zKZN1dDvbWjxKkGsx7XwFdSUCnF19Q8psHEUWR7C/LtSQ5crU/g+tQVRBtSgoUcE8T+FWp5wBxKvWG2X9gD+s9/4zRmDeSJR77W6gSA/+hpOZoSE+4KgNdnbYSNtbZH/dN74EG7GLb/gcIpbUUzPNXpfKl7mQitw==";
storagebox-rsa.hostNames = [ "[u359378.your-storagebox.de]:23" ];
storagebox-rsa.publicKey = "ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA5EB5p/5Hp3hGW1oHok+PIOH9Pbn7cnUiGmUEBrCVjnAw+HrKyN8bYVV0dIGllswYXwkG/+bgiBlE6IVIBAq+JwVWu1Sss3KarHY3OvFJUXZoZyRRg/Gc/+LRCE7lyKpwWQ70dbelGRyyJFH36eNv6ySXoUYtGkwlU5IVaHPApOxe4LHPZa/qhSRbPo2hwoh0orCtgejRebNtW5nlx00DNFgsvn8Svz2cIYLxsPVzKgUxs8Zxsxgn+Q/UvR7uq4AbAhyBMLxv7DjJ1pc7PJocuTno2Rw9uMZi1gkjbnmiOh6TTXIEWbnroyIhwc8555uto9melEUmWNQ+C+PwAK+MPw==";
};
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services.borgbackup.jobs.clan-lol = {
paths = [
"/home"
"/var"
"/root"
];
exclude = [
"*.pyc"
"/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"
];
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# $ ssh-keygen -y -f /run/secrets/hetzner-borgbackup-ssh > /tmp/hetzner-borgbackup-ssh.pub
# $ cat /tmp/hetzner-borgbackup-ssh.pub | ssh -p23 u366395@u366395.your-storagebox.de install-ssh-key
repo = "u366395@u366395.your-storagebox.de:/./borgbackup";
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# 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
doInit = true;
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encryption = {
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mode = "repokey-blake2";
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# $ nix run nixpkgs#xkcdpass -- -d '-' -n 3 -C capitalize "$@"
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passCommand = "cat ${config.sops.secrets.hetzner-borgbackup-passphrase.path}";
};
compression = "auto,zstd";
startAt = "daily";
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# Also enable ssh support in the storagebox web interface.
# By default the storage box is only accessible from the hetzner network.
# $ ssh-keygen -t ed25519 -N "" -f /tmp/ssh_host_ed25519_key
# $ cat /tmp/ssh_host_ed25519_key.pub | ssh -p23 u359378@u359378.your-storagebox.de install-ssh-key
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environment.BORG_RSH = "ssh -oPort=23 -i ${config.sops.secrets.hetzner-borgbackup-ssh.path}";
preHook = ''
set -x
'';
postHook = ''
cat > /var/log/telegraf/borgbackup-clan-lol <<EOF
task,frequency=daily last_run=$(date +%s)i,state="$([[ $exitStatus == 0 ]] && echo ok || echo fail)"
EOF
'';
prune.keep = {
within = "1d"; # Keep all archives from the last day
daily = 7;
weekly = 4;
monthly = 0;
};
};
}