Add nixos module
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@ -46,5 +46,6 @@
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projectDir = ./.;
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};
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};
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nixosModules.default = import ./module.nix self;
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};
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}
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@ -0,0 +1,154 @@
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flake: { config, lib, pkgs, ... }:
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let
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inherit (lib) mkIf mkOption types;
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cfg = config.services.inquisitor;
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in
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{
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options = {
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services.inquisitor = {
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enable = mkOption {
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type = types.bool;
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default = true;
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description = "Enable the Inquisitor aggregator.";
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};
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listen.addr = mkOption {
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type = types.str;
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default = "0.0.0.0";
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description = "Listen address passed to nginx.";
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};
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listen.port = mkOption {
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type = types.port;
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default = 80;
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description = "Listen port passed to nginx.";
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};
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};
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};
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config =
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let
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# Get the inquisitor package from the flake.
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inquisitor = flake.packages.${pkgs.stdenv.hostPlatform.system}.default;
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# Define the inquisitor state directory.
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stateDir = "/var/lib/inquisitor";
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# Define an scp helper for item callbacks to use.
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scp-helper = pkgs.writeShellScriptBin "scp-helper" ''
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${pkgs.openssh}/bin/scp -i ${stateDir}/.ssh/inquisitor.key -oStrictHostKeyChecking=no "$@"
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'';
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# Define the inquisitor service user.
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svcUser = {
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name = "inquisitor";
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group = "inquisitor";
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description = "Inquisitor service user";
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isSystemUser = true;
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shell = pkgs.bashInteractive;
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packages = [ inquisitor pkgs.cron ];
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};
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# Create a config file pointing to the state directory.
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inqConfig = pkgs.writeTextFile {
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name = "inquisitor.conf";
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text = ''
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DataPath = ${stateDir}/data/
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SourcePath = ${stateDir}/sources/
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CachePath = ${stateDir}/cache/
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Verbose = false
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LogFile = ${stateDir}/inquisitor.log
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'';
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};
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# Create a setup script to ensure the service directory state.
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inqSetup = pkgs.writeShellScript "inquisitor-setup.sh" ''
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# Ensure the required directories exist.
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${pkgs.coreutils}/bin/mkdir -p ${stateDir}/data/inquisitor/
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${pkgs.coreutils}/bin/mkdir -p ${stateDir}/sources/
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${pkgs.coreutils}/bin/mkdir -p ${stateDir}/cache/
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if [ ! -f ${stateDir}/data/inquisitor/state ]; then
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${pkgs.coreutils}/bin/echo "{}" > ${stateDir}/data/inquisitor/state
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fi
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# Ensure the service owns the folders.
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${pkgs.coreutils}/bin/chown -R ${svcUser.name} ${stateDir}
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# Ensure the scp helper is present
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if [ -f ${stateDir}/scp-helper ]; then
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${pkgs.coreutils}/bin/rm ${stateDir}/scp-helper
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fi
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ln -s -t ${stateDir}/scp-helper ${scp-helper}/bin/scp-helper
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'';
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# Create a run script for the service.
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inqRun = pkgs.writeShellScript "inquisitor-run.sh" ''
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cd ${stateDir}
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${inquisitor}/bin/gunicorn \
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--bind=localhost:24133 \
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--workers=4 \
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--timeout 120 \
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--log-level debug \
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"inquisitor.app:wsgi()"
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'';
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# Create a wrapper to execute the cli as the service user.
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# (needed to avoid creating files in the state dir the service can't read)
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inqWrapper = pkgs.writeShellScriptBin "inq" ''
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sudo --user=${svcUser.name} ${inquisitor}/bin/inquisitor "$@"
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'';
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in mkIf cfg.enable
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{
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users.users.inquisitor = svcUser;
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users.groups.inquisitor = {};
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# Link the config in /etc to avoid envvar shenanigans
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environment.etc."inquisitor.conf".source = inqConfig;
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# Give all users the wrapper program.
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environment.systemPackages = [ inqWrapper ];
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# Allow the sudo in the cli wrapper without password.
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security.sudo.extraRules = [{
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commands = [{
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command = "${inquisitor}/bin/inquisitor";
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options = [ "NOPASSWD" ];
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}];
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runAs = svcUser.name;
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groups = [ "users" ];
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}];
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# Run the setup script on activation.
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system.activationScripts.inquisitorSetup = "${inqSetup}";
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# Set up the inquisitor service.
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systemd.services.inquisitor = {
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description = "Inquisitor server";
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script = "${inqRun}";
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serviceConfig = {
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User = svcUser.name;
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Type = "simple";
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};
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wantedBy = [ "multi-user.target" ];
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after = [ "network.target" ];
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enable = true;
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};
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# Set up the nginx reverse proxy to the server.
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services.nginx.enable = true;
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services.nginx.virtualHosts.inquisitorHost = {
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listen = [ cfg.listen ];
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locations."/".extraConfig = ''
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access_log /var/log/nginx/access.inquisitor.log;
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proxy_buffering off;
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proxy_pass http://localhost:24133/;
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'';
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};
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networking.firewall.allowedTCPPorts = [ cfg.listen.port ];
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# Enable cron so the service can use it to schedule fetches.
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services.cron.enable = true;
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};
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}
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