Migrate to Snowfall (#1)

Reviewed-on: #1
Co-authored-by: Evan Reichard <evan@reichard.io>
Co-committed-by: Evan Reichard <evan@reichard.io>

modules/nixos/services/openiscsi/default.nix

@@ -0,0 +1,57 @@
+{ config, pkgs, lib, namespace, host, ... }:
+let
+  inherit (lib) types mkIf;
+  inherit (lib.${namespace}) mkOpt mkBoolOpt;
+
+  cfg = config.${namespace}.services.openiscsi;
+  cloudInitEnabled = config.${namespace}.services.cloud-init.enable;
+in
+{
+  options.${namespace}.services.openiscsi = {
+    enable = lib.mkEnableOption "Open iSCSI support";
+    name = mkOpt types.str "iqn.2025.reichard.io:${host}" "iSCSI name";
+    symlink = mkBoolOpt false "Create a symlink to the iSCSI binaries";
+  };
+
+  config = mkIf cfg.enable {
+    boot.kernelModules = [ "iscsi_tcp" "libiscsi" "scsi_transport_iscsi" ];
+
+    services.openiscsi = {
+      enable = true;
+      name = cfg.name;
+    };
+
+    environment.systemPackages = with pkgs; [
+      openiscsi
+    ];
+
+    # Predominately used for RKE2 & Democratic CSI
+    system.activationScripts.iscsi-symlink = mkIf cfg.symlink ''
+      mkdir -p /usr/bin
+      ln -sf ${pkgs.openiscsi}/bin/iscsiadm /usr/bin/iscsiadm
+      ln -sf ${pkgs.openiscsi}/bin/iscsid /usr/bin/iscsid
+    '';
+
+    # Cloud Init Compatibility
+    environment.etc."iscsi/initiatorname.iscsi".enable = mkIf cloudInitEnabled false;
+    systemd.services.iscsi-initiator-setup = mkIf cloudInitEnabled {
+      description = "Setup iSCSI Initiator Name";
+      requires = [ "cloud-final.service" ];
+      before = [ "iscsid.service" ];
+      after = [ "cloud-final.service" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Type = "oneshot";
+        RemainAfterExit = true;
+      };
+
+      path = [ pkgs.hostname pkgs.util-linux ];
+      script = ''
+        mkdir -p /run/iscsi
+        echo "InitiatorName=iqn.2025.org.nixos:$(hostname)" > /run/iscsi/initiatorname.iscsi
+        mount --bind /run/iscsi/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
+      '';
+    };
+  };
+}