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|
{ config, pkgs, lib, ... }:
let
inherit (lib) mkOption types mkIf mkMerge mkDefault mkEnableOption mkPackageOption maintainers;
cfg = config.services.db-rest;
in
{
options = {
services.db-rest = {
enable = mkEnableOption "db-rest service";
user = mkOption {
type = types.str;
default = "db-rest";
description = "User account under which db-rest runs.";
};
group = mkOption {
type = types.str;
default = "db-rest";
description = "Group under which db-rest runs.";
};
host = mkOption {
type = types.str;
default = "127.0.0.1";
description = "The host address the db-rest server should listen on.";
};
port = mkOption {
type = types.port;
default = 3000;
description = "The port the db-rest server should listen on.";
};
redis = {
enable = mkOption {
type = types.bool;
default = false;
description = "Enable caching with redis for db-rest.";
};
createLocally = mkOption {
type = types.bool;
default = true;
description = "Configure a local redis server for db-rest.";
};
host = mkOption {
type = with types; nullOr str;
default = null;
description = "Redis host.";
};
port = mkOption {
type = with types; nullOr port;
default = null;
description = "Redis port.";
};
user = mkOption {
type = with types; nullOr str;
default = null;
description = "Optional username used for authentication with redis.";
};
passwordFile = mkOption {
type = with types; nullOr path;
default = null;
example = "/run/keys/db-rest/pasword-redis-db";
description = "Path to a file containing the redis password.";
};
useSSL = mkOption {
type = types.bool;
default = true;
description = "Use SSL if using a redis network connection.";
};
};
package = mkPackageOption pkgs "db-rest" { };
};
};
config = mkIf cfg.enable {
assertions = [
{
assertion = (cfg.redis.enable && !cfg.redis.createLocally) -> (cfg.redis.host != null && cfg.redis.port != null);
message = ''
{option}`services.db-rest.redis.createLocally` and redis network connection ({option}`services.db-rest.redis.host` or {option}`services.db-rest.redis.port`) enabled. Disable either of them.
'';
}
{
assertion = (cfg.redis.enable && !cfg.redis.createLocally) -> (cfg.redis.passwordFile != null);
message = ''
{option}`services.db-rest.redis.createLocally` is disabled, but {option}`services.db-rest.redis.passwordFile` is not set.
'';
}
];
systemd.services.db-rest = mkMerge [
{
description = "db-rest service";
after = [ "network.target" ]
++ lib.optional cfg.redis.createLocally "redis-db-rest.service";
requires = lib.optional cfg.redis.createLocally "redis-db-rest.service";
wantedBy = [ "multi-user.target" ];
serviceConfig = {
Type = "simple";
Restart = "always";
RestartSec = 5;
WorkingDirectory = cfg.package;
User = cfg.user;
Group = cfg.group;
RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
MemoryDenyWriteExecute = false;
LoadCredential = lib.optional (cfg.redis.enable && cfg.redis.passwordFile != null) "REDIS_PASSWORD:${cfg.redis.passwordFile}";
ExecStart = mkDefault "${cfg.package}/bin/db-rest";
RemoveIPC = true;
NoNewPrivileges = true;
PrivateDevices = true;
ProtectClock = true;
ProtectKernelLogs = true;
ProtectControlGroups = true;
ProtectKernelModules = true;
PrivateMounts = true;
SystemCallArchitectures = "native";
ProtectHostname = true;
LockPersonality = true;
ProtectKernelTunables = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
RestrictNamespaces = true;
ProtectSystem = "strict";
ProtectProc = "invisible";
ProcSubset = "pid";
ProtectHome = true;
PrivateUsers = true;
PrivateTmp = true;
CapabilityBoundingSet = "";
};
environment = {
NODE_ENV = "production";
NODE_EXTRA_CA_CERTS = "/etc/ssl/certs/ca-certificates.crt";
HOSTNAME = cfg.host;
PORT = toString cfg.port;
};
}
(mkIf cfg.redis.enable (if cfg.redis.createLocally then
{ environment.REDIS_URL = config.services.redis.servers.db-rest.unixSocket; }
else
{
script =
let
username = lib.optionalString (cfg.redis.user != null) (cfg.redis.user);
host = cfg.redis.host;
port = toString cfg.redis.port;
protocol = if cfg.redis.useSSL then "rediss" else "redis";
in
''
export REDIS_URL="${protocol}://${username}:$(${config.systemd.package}/bin/systemd-creds cat REDIS_PASSWORD)@${host}:${port}"
exec ${cfg.package}/bin/db-rest
'';
}))
];
users.users = lib.mkMerge [
(lib.mkIf (cfg.user == "db-rest") {
db-rest = {
isSystemUser = true;
group = cfg.group;
};
})
(lib.mkIf cfg.redis.createLocally { ${cfg.user}.extraGroups = [ "redis-db-rest" ]; })
];
users.groups = lib.mkIf (cfg.group == "db-rest") { db-rest = { }; };
services.redis.servers.db-rest.enable = cfg.redis.enable && cfg.redis.createLocally;
};
meta.maintainers = with maintainers; [ marie ];
}
|
