fix(extern): krb5+nfs

modules/extern/misc/sssd.nix

@@ -1,5 +1,6 @@
 { ... }: {
   imports = [
     ../../nixos/sssd/sssd.nix
+    ../../nixos/sssd/pam.nix
   ];
 }

modules/extern/nixos/krb5.nix

@@ -7,10 +7,10 @@
   ...
 }: let
   inherit (gensokyo-zone.lib) mkAlmostOptionDefault mapOptionDefaults mapAlmostOptionDefaults;
-  inherit (lib.options) mkOption mkEnableOption;
-  inherit (lib.modules) mkIf mkMerge mkBefore mkAfter mkDefault mkOptionDefault;
-  inherit (lib.lists) optional;
-  inherit (lib.strings) toUpper;
+  inherit (lib.options) mkOption mkEnableOption mkPackageOption;
+  inherit (lib.modules) mkIf mkMerge mkBefore mkAfter mkForce mkDefault mkOptionDefault;
+  inherit (lib.lists) optional elem;
+  inherit (lib.strings) toUpper concatStringsSep;
   inherit (gensokyo-zone.lib) unmerged;
   cfg = config.gensokyo-zone.krb5;
   krb5Module = {
@@ -127,6 +127,25 @@
       };
       nfs = {
         enable = mkEnableOption "nfs";
+        package = mkPackageOption pkgs "nfs-utils" { };
+        idmapd = {
+          localDomain = mkOption {
+            type = bool;
+            default = enabled.sssd && nixosConfig.services.sssd.services.nss.enable;
+          };
+          localRealms = mkOption {
+            type = listOf str;
+            default = [ config.realm ];
+          };
+          methods = mkOption {
+            type = listOf str;
+            default = [ "nsswitch" ];
+          };
+          authToLocalNames = mkOption {
+            type = attrsOf str;
+            default = config.authToLocalNames;
+          };
+        };
         debug.enable = mkEnableOption "nfs debug logs";
       };
       ipa = {
@@ -188,6 +207,19 @@
         };
       };
       db.backend = mkIf enabled.ipa (mkAlmostOptionDefault "ipa");
+      nfs = {
+        package = mkIf (elem "umich_ldap" config.nfs.idmapd.methods) (mkAlmostOptionDefault pkgs.nfs-utils-ldap);
+        idmapd = {
+          methods = mkMerge [
+            (mkIf (config.nfs.idmapd.authToLocalNames != { }) (
+              mkOptionDefault (mkBefore [ "static" ])
+            ))
+            (mkIf (!enabled.sssd) (
+              mkOptionDefault [ "umich_ldap" ]
+            ))
+          ];
+        };
+      };
       set = {
         krb5Settings = {
           enable = mkAlmostOptionDefault true;
@@ -252,9 +284,10 @@
           realm = config.realm;
           server = config.ipa.server;
           # TODO: dyndns?
-          overrideConfigs = {
-            sssd = mkAlmostOptionDefault false;
-            krb5 = mkAlmostOptionDefault false;
+        } // {
+          overrideConfigs = mapAlmostOptionDefaults {
+            sssd = false;
+            krb5 = false;
           };
         });
         nfsSettings = mkIf config.nfs.enable {
@@ -305,10 +338,32 @@
               rpc-verbosity = 3
             '')
           ];
-          idmapd.settings = mkIf false {
-            #General.Domain = mkForce config.domain;
-            #Local-Realms = concatStringsSep "," [ config.realm nixosConfig.networking.domain ];
-            #Translation.Method = mkForce (concatStringsSep "," [ "static" "nsswitch" ]);
+          # TODO: move this into a more generic /modules/nixos/nfs that gets configured...
+          idmapd.settings = {
+            General = mkIf config.nfs.idmapd.localDomain {
+              Domain = mkForce config.domain;
+              Local-Realms = concatStringsSep "," config.nfs.idmapd.localRealms;
+            };
+            Translation.Method = mkIf (config.nfs.idmapd.methods != [ "nsswitch" ]) (mkForce (
+              concatStringsSep "," config.nfs.idmapd.methods
+            ));
+            Static = mkIf (config.nfs.idmapd.authToLocalNames != { }) config.nfs.idmapd.authToLocalNames;
+            UMICH_SCHEMA = mkIf (elem "umich_ldap" config.nfs.idmapd.methods) (mapOptionDefaults {
+              LDAP_server = config.ldap.host;
+              LDAP_use_ssl = true;
+              LDAP_ca_cert = "/etc/ssl/certs/ca-bundle.crt";
+              LDAP_base = config.ldap.baseDn;
+              LDAP_people_base = "cn=users,cn=accounts,${config.ldap.baseDn}";
+              LDAP_group_base = "cn=groups,cn=accounts,${config.ldap.baseDn}";
+              NFSv4_person_objectclass = "posixaccount"; # or "person"?
+              NFSv4_name_attr = "krbCanonicalName"; # uid? cn? gecos?
+              GSS_principal_attr = "krbPrincipalName";
+              NFSv4_group_objectclass = "posixgroup";
+              NFSv4_group_attr = "cn";
+              #LDAP_use_memberof_for_groups = true;
+              #NFSv4_member_attr = "member";
+              LDAP_canonicalize_name = false;
+            });
           };
         };
       };
@@ -363,6 +418,18 @@ in {
         ${freeipa.config.access.address4ForNetwork.local} = mkBefore [ cfg.host ];
       };
     };
+    environment.etc = {
+      "request-key.conf" = mkIf (cfg.enable && cfg.nfs.enable && cfg.sssd.enable) {
+        source = let
+          nfsidmap = pkgs.writeShellScript "nfsidmap" ''
+            export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:${config.system.nssModules.path}"
+            exec ${cfg.nfs.package}/bin/nfsidmap "$@"
+          '';
+        in mkForce (pkgs.writeText "request-key.conf" ''
+          create id_resolver * * ${nfsidmap} -t 600 %k %d
+        '');
+      };
+    };
     ${if options ? sops.secrets then "sops" else null}.secrets = let
       sopsFile = mkDefault ../secrets/krb5.yaml;
     in mkIf cfg.enable {

modules/extern/nixos/kyuuto.nix

@@ -8,6 +8,7 @@
   inherit (lib.modules) mkIf mkMerge mkDefault mkOptionDefault;
   inherit (gensokyo-zone.lib) unmerged;
   cfg = config.gensokyo-zone.kyuuto;
+  nfsEnabled = config.boot.supportedFilesystems.nfs or config.boot.supportedFilesystems.nfs4 or false;
   kyuutoModule = {
     gensokyo-zone,
     nixosConfig,
@@ -112,7 +113,7 @@
       setFilesystems = {
         "/mnt/kyuuto-media" = mkIf config.media.enable {
           device = mkMerge [
-            (mkIf config.nfs.enable "nfs.${config.domain}:/mnt/kyuuto-media")
+            (mkIf config.nfs.enable "nfs.${config.domain}:/srv/fs/kyuuto/media")
             (mkIf config.smb.enable (
               if config.smb.user != null && access.local.enable
               then ''\\smb.${config.domain}\kyuuto-media''
@@ -134,7 +135,7 @@
         };
         "/mnt/kyuuto-transfer" = mkIf config.transfer.enable {
           device = mkMerge [
-            (mkIf config.nfs.enable "nfs.${config.domain}:/mnt/kyuuto-media/transfer")
+            (mkIf config.nfs.enable "nfs.${config.domain}:/srv/fs/kyuuto/transfer")
             (mkIf (config.smb.enable && access.local.enable) ''\\smb.${config.domain}\kyuuto-transfer'')
           ];
           fsType = mkMerge [
@@ -177,6 +178,10 @@ in {
     fileSystems = mkIf cfg.enable (
       unmerged.mergeAttrs cfg.setFilesystems
     );
+    systemd.services.rpc-svcgssd = mkIf (!config.services.nfs.server.enable && nfsEnabled) {
+      enable = false;
+    };
+
     lib.gensokyo-zone.kyuuto = {
       inherit cfg kyuutoModule;
     };

modules/nixos/ipa.nix

@@ -98,6 +98,7 @@ in {
     config = mkIf (sssd.configText != null) (mkAlmostForce sssd.configText);
   };
   config.security.krb5 = mkIf cfg.enable {
+    enable = mkAlmostForce false;
     package = mkAlmostOptionDefault pkgs.krb5Full;
     settings = {
       libdefaults = mapOptionDefaults {

modules/nixos/sssd/pam.nix

@@ -0,0 +1,35 @@
+{
+  config,
+  lib,
+  gensokyo-zone,
+  ...
+}: let
+  inherit (gensokyo-zone.lib) mkAlmostForce;
+  inherit (lib.options) mkOption;
+  inherit (lib.modules) mkIf;
+  inherit (lib.attrsets) genAttrs;
+  cfg = config.services.sssd;
+  pamRulesModule = { ... }: let
+    rules = [ "account" "auth" "password" "session" ];
+    mkRuleConfig = ruleName: {
+      sss = mkIf cfg.enable {
+        enable = mkIf (!cfg.services.pam.enable) (mkAlmostForce false);
+      };
+    };
+  in {
+    config = genAttrs rules mkRuleConfig;
+  };
+  pamServiceModule = { ... }: {
+    options = with lib.types; {
+      rules = mkOption {
+        type = submodule pamRulesModule;
+      };
+    };
+  };
+in {
+  options.security.pam = with lib.types; {
+    services = mkOption {
+      type = attrsOf (submodule pamServiceModule);
+    };
+  };
+}

nixos/nfs.nix

@@ -1,21 +1,51 @@
 {
-  inputs,
+  gensokyo-zone,
   config,
   lib,
   ...
 }: let
-  inherit (inputs.self.lib.lib) mkBaseDn;
-  inherit (lib.modules) mkIf mkForce mkDefault;
+  inherit (gensokyo-zone.lib) mkBaseDn mapOptionDefaults;
+  inherit (lib.modules) mkIf mkMerge mkForce mkDefault mkOptionDefault;
   inherit (lib.lists) optional optionals;
   inherit (lib.strings) toUpper concatStringsSep;
   inherit (config.networking.access) cidrForNetwork;
   cfg = config.services.nfs;
   inherit (cfg.export) flagSets;
   inherit (config.networking) domain;
+  inherit (config.users) ldap;
   enableLdap = false;
   baseDn = mkBaseDn domain;
+  realm = toUpper domain;
+  debugLogging = true;
 in {
   config.services.nfs = {
+    settings = mkMerge [
+      (mkIf debugLogging {
+        mountd.debug = mkOptionDefault "all";
+        exportfs.debug = mkOptionDefault "all";
+        exportd.debug = mkOptionDefault "all";
+        gssd = mapOptionDefaults {
+          verbosity = 2;
+          rpc-verbosity = 2;
+        };
+        svcgssd = mapOptionDefaults {
+          verbosity = 2;
+          rpc-verbosity = 2;
+          idmap-verbosity = 2;
+        };
+      })
+      {
+        mountd.reverse-lookup = mkOptionDefault false;
+        gssd = {
+          preferred-realm = mkOptionDefault realm;
+        };
+        /*svcgssd = {
+          #principal = system
+          #principal = nfs/idp.${domain}@${realm}
+          #principal = nfs/${config.networking.fqdn}@${realm}
+        };*/
+      }
+    ];
     server = {
       enable = mkDefault true;
       statdPort = mkDefault 4000;
@@ -72,7 +102,7 @@ in {
       General = {
         Domain = mkForce domain;
         Local-Realms = concatStringsSep "," [
-          (toUpper domain)
+          realm
           #(toString config.networking.fqdn)
         ];
       };
@@ -88,8 +118,8 @@ in {
         LDAP_use_ssl = true;
         LDAP_ca_cert = "/etc/ssl/certs/ca-bundle.crt";
         LDAP_base = baseDn;
-        LDAP_people_base = "cn=users,cn=accounts,${baseDn}";
-        LDAP_group_base = "cn=groups,cn=accounts,${baseDn}";
+        LDAP_people_base = "${ldap.userDnSuffix}${baseDn}";
+        LDAP_group_base = "${ldap.groupDnSuffix}${baseDn}";
         GSS_principal_attr = "krbPrincipalName";
         NFSv4_person_objectclass = "posixaccount"; # or "person"?
         NFSv4_group_objectclass = "posixgroup";