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|
{ lib, config, pkgs, utils, ... }:
let
inherit (lib) mdDoc mkEnableOption mkIf mkOption types;
cfg = config.services.imaginary;
in {
options.services.imaginary = {
enable = mkEnableOption (mdDoc "imaginary image processing microservice");
address = mkOption {
type = types.str;
default = "localhost";
description = mdDoc ''
Bind address. Corresponds to the `-a` flag.
Set to `""` to bind to all addresses.
'';
example = "[::1]";
};
port = mkOption {
type = types.port;
default = 8088;
description = mdDoc "Bind port. Corresponds to the `-p` flag.";
};
settings = mkOption {
description = mdDoc ''
Command line arguments passed to the imaginary executable, stripped of
the prefix `-`. See upstream's
[README](https://github.com/h2non/imaginary#command-line-usage) for all
options.
'';
type = types.submodule {
freeformType = with types; attrsOf (oneOf [
bool
int
(nonEmptyListOf str)
str
]);
options = {
return-size = mkOption {
type = types.bool;
default = false;
description = mdDoc "Return the image size in the HTTP headers.";
};
};
};
};
};
config = mkIf cfg.enable {
assertions = [ {
assertion = ! lib.hasAttr "a" cfg.settings;
message = "Use services.imaginary.address to specify the -a flag.";
} {
assertion = ! lib.hasAttr "p" cfg.settings;
message = "Use services.imaginary.port to specify the -p flag.";
} ];
systemd.services.imaginary = {
after = [ "network.target" ];
wantedBy = [ "multi-user.target" ];
serviceConfig = rec {
ExecStart = let
args = lib.mapAttrsToList (key: val:
"-" + key + "=" + lib.concatStringsSep "," (map toString (lib.toList val))
) (cfg.settings // { a = cfg.address; p = cfg.port; });
in "${pkgs.imaginary}/bin/imaginary ${utils.escapeSystemdExecArgs args}";
ProtectProc = "invisible";
BindReadOnlyPaths = lib.optional (cfg.settings ? mount) cfg.settings.mount;
CapabilityBoundingSet = if cfg.port < 1024 then
[ "CAP_NET_BIND_SERVICE" ]
else
[ "" ];
AmbientCapabilities = CapabilityBoundingSet;
NoNewPrivileges = true;
DynamicUser = true;
ProtectSystem = "strict";
ProtectHome = true;
TemporaryFileSystem = [ "/:ro" ];
PrivateTmp = true;
PrivateDevices = true;
PrivateUsers = cfg.port >= 1024;
ProtectHostname = true;
ProtectClock = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectKernelLogs = true;
ProtectControlGroups = true;
RestrictAddressFamilies = [
"AF_INET"
"AF_INET6"
];
RestrictNamespaces = true;
LockPersonality = true;
MemoryDenyWriteExecute = true;
RestrictRealtime = true;
PrivateMounts = true;
SystemCallFilter = [
"@system-service"
"~@privileged"
];
DevicePolicy = "closed";
};
};
};
meta = {
maintainers = with lib.maintainers; [ dotlambda ];
};
}
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