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Add user option in geth nixos module. #626

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Add user option in geth nixos module. #626

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cfc6c7e
Make some geth service config overrideable.
thalin Jul 20, 2025
b0a3966
Use the same idea as prysm-beacon to set the user.
thalin Aug 21, 2025
e308981
If a user is set, turn off DynamicUser.
thalin Aug 23, 2025
3ce8aee
Add new dynamicUser option to disable DynamicUser.
thalin Sep 1, 2025
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19 changes: 16 additions & 3 deletions modules/geth/default.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,8 @@
flatten
mapAttrs'
mapAttrsToList
mkDefault
mkForce
mkIf
mkMerge
nameValuePair
Expand Down Expand Up @@ -121,13 +123,24 @@ in {
serviceConfig = mkMerge [
baseServiceConfig
{
User = serviceName;
StateDirectory = serviceName;
ExecStart = "${cfg.package}/bin/geth ${scriptArgs}";
User =
if cfg.user != null
then cfg.user
else mkDefault serviceName;
StateDirectory = mkDefault serviceName;
ExecStart = mkDefault "${cfg.package}/bin/geth ${scriptArgs}";
}
(mkIf (cfg.args.authrpc.jwtsecret != null) {
LoadCredential = ["jwtsecret:${cfg.args.authrpc.jwtsecret}"];
})
(mkIf (!cfg.dynamicUser) {
DynamicUser = mkForce false;
RemoveIPC = mkDefault true;
PrivateTmp = mkDefault true;
NoNewPrivileges = mkDefault "strict";
RestrictSUIDSGID = mkDefault true;
ProtectSystem = mkDefault true;
})
];
})
)
Expand Down
12 changes: 12 additions & 0 deletions modules/geth/options.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,18 @@

inherit args;

dynamicUser = mkOption {
type = types.bool;
default = true;
description = "Whether to use systemd's DynamicUser feature.";
};

user = mkOption {
type = types.nullOr types.str;
default = null;
description = "User to run the service as.";
};

extraArgs = mkOption {
type = types.listOf types.str;
description = "Additional arguments to pass to Go Ethereum.";
Expand Down