dotfiles/modules/nixos/services/vaultwarden.nix

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# Vaultwarden is an implementation of the Bitwarden password manager backend
# service, which allows for self-hosting the synchronization of a Bitwarden
# password manager client.
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{ config, pkgs, lib, ... }:
let vaultwardenPath = "/var/lib/bitwarden_rs"; # Default service directory
in {
config = lib.mkIf config.services.vaultwarden.enable {
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services.vaultwarden = {
config = {
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DOMAIN = "https://${config.hostnames.secrets}";
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SIGNUPS_ALLOWED = false;
SIGNUPS_VERIFY = true;
INVITATIONS_ALLOWED = true;
WEB_VAULT_ENABLED = true;
ROCKET_ADDRESS = "127.0.0.1";
ROCKET_PORT = 8222;
WEBSOCKET_ENABLED = true;
WEBSOCKET_ADDRESS = "0.0.0.0";
WEBSOCKET_PORT = 3012;
LOGIN_RATELIMIT_SECONDS = 60;
LOGIN_RATELIMIT_MAX_BURST = 10;
ADMIN_RATELIMIT_SECONDS = 300;
ADMIN_RATELIMIT_MAX_BURST = 3;
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};
environmentFile = config.secrets.vaultwarden.dest;
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dbBackend = "sqlite";
};
secrets.vaultwarden = {
source = ../../../private/vaultwarden.age;
dest = "${config.secretsDirectory}/vaultwarden";
owner = "vaultwarden";
group = "vaultwarden";
};
networking.firewall.allowedTCPPorts = [ 3012 ];
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caddy.routes = [{
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match = [{ host = [ config.hostnames.secrets ]; }];
handle = [{
handler = "reverse_proxy";
upstreams = [{
dial = "localhost:${
builtins.toString config.services.vaultwarden.config.ROCKET_PORT
}";
}];
headers.request.add."X-Real-IP" = [ "{http.request.remote.host}" ];
}];
}];
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# Configure Cloudflare DNS to point to this machine
services.cloudflare-dyndns.domains = [ config.hostnames.secrets ];
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## Backup config
# Open to groups, allowing for backups
systemd.services.vaultwarden.serviceConfig.StateDirectoryMode =
lib.mkForce "0770";
systemd.tmpfiles.rules = [
"f ${vaultwardenPath}/db.sqlite3 0660 vaultwarden vaultwarden"
"f ${vaultwardenPath}/db.sqlite3-shm 0660 vaultwarden vaultwarden"
"f ${vaultwardenPath}/db.sqlite3-wal 0660 vaultwarden vaultwarden"
];
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# Allow litestream and vaultwarden to share a sqlite database
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users.users.litestream.extraGroups = [ "vaultwarden" ];
users.users.vaultwarden.extraGroups = [ "litestream" ];
# Backup sqlite database with litestream
services.litestream = {
settings = {
dbs = [{
path = "${vaultwardenPath}/db.sqlite3";
replicas = [{
url =
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"s3://${config.backup.s3.bucket}.${config.backup.s3.endpoint}/vaultwarden";
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}];
}];
};
};
# Don't start litestream unless vaultwarden is up
systemd.services.litestream = {
after = [ "vaultwarden.service" ];
requires = [ "vaultwarden.service" ];
};
# Run a separate file backup on a schedule
systemd.timers.vaultwarden-backup = {
timerConfig = {
OnCalendar = "*-*-* 06:00:00"; # Once per day
Unit = "vaultwarden-backup.service";
};
wantedBy = [ "timers.target" ];
};
# Backup other Vaultwarden data to object storage
systemd.services.vaultwarden-backup = {
description = "Backup Vaultwarden files";
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environment.AWS_ACCESS_KEY_ID = config.backup.s3.accessKeyId;
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serviceConfig = {
Type = "oneshot";
User = "vaultwarden";
Group = "backup";
EnvironmentFile = config.secrets.backup.dest;
};
script = ''
${pkgs.awscli2}/bin/aws s3 sync \
${vaultwardenPath}/ \
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s3://${config.backup.s3.bucket}/vaultwarden/ \
--endpoint-url=https://${config.backup.s3.endpoint} \
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--exclude "*db.sqlite3*" \
--exclude ".db.sqlite3*"
'';
};
};
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}