123 lines
3.7 KiB
Nix
123 lines
3.7 KiB
Nix
{ pkg, rev }:
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{ config, lib, ... }:
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let
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cfg = config.services.noisebell;
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bin = "${pkg}/bin/noisebell";
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in
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{
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options.services.noisebell = {
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enable = lib.mkEnableOption "noisebell GPIO door monitor";
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gpioPin = lib.mkOption {
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type = lib.types.ints.unsigned;
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default = 17;
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description = "GPIO pin number to monitor.";
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};
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debounceSecs = lib.mkOption {
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type = lib.types.ints.positive;
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default = 5;
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description = "Debounce delay in seconds.";
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};
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port = lib.mkOption {
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type = lib.types.port;
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default = 8080;
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description = "HTTP port for the status endpoint.";
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};
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endpointUrl = lib.mkOption {
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type = lib.types.str;
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description = "Webhook endpoint URL to POST state changes to.";
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};
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apiKeyFile = lib.mkOption {
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type = lib.types.path;
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description = "Path to a file containing the outbound API key for the cache endpoint.";
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};
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inboundApiKeyFile = lib.mkOption {
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type = lib.types.path;
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description = "Path to a file containing the inbound API key for authenticating GET requests.";
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};
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retryAttempts = lib.mkOption {
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type = lib.types.ints.unsigned;
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default = 3;
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description = "Number of retries after a failed webhook POST.";
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};
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retryBaseDelaySecs = lib.mkOption {
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type = lib.types.ints.positive;
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default = 1;
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description = "Base delay in seconds for exponential backoff between retries.";
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};
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httpTimeoutSecs = lib.mkOption {
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type = lib.types.ints.positive;
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default = 10;
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description = "Timeout in seconds for outbound HTTP requests to the webhook endpoint.";
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};
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bindAddress = lib.mkOption {
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type = lib.types.str;
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default = "0.0.0.0";
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description = "Address to bind the HTTP server to.";
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};
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activeLow = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = "Whether a low GPIO level means open. Set to false if your sensor wiring is inverted.";
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};
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restartDelaySecs = lib.mkOption {
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type = lib.types.ints.positive;
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default = 5;
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description = "Seconds to wait before systemd restarts the service on failure.";
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};
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watchdogSecs = lib.mkOption {
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type = lib.types.ints.positive;
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default = 30;
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description = "Watchdog timeout in seconds. The service is restarted if it fails to notify systemd within this interval.";
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};
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};
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config = lib.mkIf cfg.enable {
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systemd.services.noisebell = {
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description = "Noisebell GPIO door monitor";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-online.target" "tailscaled.service" ];
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wants = [ "network-online.target" ];
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environment = {
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NOISEBELL_GPIO_PIN = toString cfg.gpioPin;
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NOISEBELL_DEBOUNCE_SECS = toString cfg.debounceSecs;
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NOISEBELL_PORT = toString cfg.port;
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NOISEBELL_RETRY_ATTEMPTS = toString cfg.retryAttempts;
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NOISEBELL_RETRY_BASE_DELAY_SECS = toString cfg.retryBaseDelaySecs;
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NOISEBELL_HTTP_TIMEOUT_SECS = toString cfg.httpTimeoutSecs;
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NOISEBELL_ENDPOINT_URL = cfg.endpointUrl;
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NOISEBELL_BIND_ADDRESS = cfg.bindAddress;
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NOISEBELL_ACTIVE_LOW = if cfg.activeLow then "true" else "false";
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NOISEBELL_COMMIT = rev;
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RUST_LOG = "info";
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};
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script = ''
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export NOISEBELL_API_KEY="$(cat ${cfg.apiKeyFile})"
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export NOISEBELL_INBOUND_API_KEY="$(cat ${cfg.inboundApiKeyFile})"
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exec ${bin}
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'';
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serviceConfig = {
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Type = "notify";
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NotifyAccess = "all";
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WatchdogSec = cfg.watchdogSecs;
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Restart = "on-failure";
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RestartSec = cfg.restartDelaySecs;
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};
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};
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};
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}
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