Merge pull request 'Worktree ipa lxc kerberos fix' (#85) from worktree-ipa-lxc-kerberos-fix into main

Reviewed-on: #85

modules/common/aliases.nix

@@ -1,50 +1,7 @@
-{ config, pkgs, lib, vars, ... }:
+_:
 
-let
-  # Flake attribute names are now <platform>-<buildtype> (e.g. proxmox-docker)
-  # and no longer match networking.hostName, since a host's hostname stays
-  # fixed while the platform backing it can change. Each nixosConfiguration
-  # stamps its own active target name into /etc/flake-target at build time.
-  mySwitchCmd = ''
-    sudo nixos-rebuild switch \
-      --no-write-lock-file \
-      --refresh \
-      --flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
-  '';
-  myTestCmd = ''
-    sudo nixos-rebuild test \
-      --no-write-lock-file \
-      --refresh \
-      --flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
-  '';
-
-  # lxc-* hosts pre-seed their SSH host key at build time (see
-  # modules/platforms/lxc.nix) so sops-nix's .sops.yaml recipient matches on
-  # first boot -- without it, secrets permanently fail to decrypt (see that
-  # file's comment for the confirmed failure). That requires --impure plus
-  # NIXOS_HOST_KEYS_DIR pointing at the repo's host-keys/ dir, same pattern
-  # docs/auto-installer.md uses for the installer ISO. A function, not a
-  # shellAlias, since the target name has to interpolate into the middle of
-  # the flake attribute path, not just append after it. Must be run from the
-  # repo root, same as every other host-keys/ command in this repo.
-  buildImageFn = ''
-    buildImage() {
-      if [ -z "$1" ]; then
-        echo "usage: buildImage <flake-target>  (e.g. lxc-docker)" >&2
-        return 1
-      fi
-      NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" nix build --impure \
-        ".#nixosConfigurations.$1.config.system.build.tarball"
-    }
-  '';
-in
 {
-  programs.bash = {
+  # Switch-nix, Test-nix, and buildImage are defined system-wide in
-    enable = true;
+  # modules/common/configuration.nix so all users (including IPA accounts)
-    shellAliases = {
+  # get them. Add any Home-Manager-only per-user shell config here.
-      "Switch-nix" = mySwitchCmd;
-      "Test-nix" = myTestCmd;
-    };
-    initExtra = buildImageFn;
-  };
 }

modules/common/configuration.nix

@@ -1,5 +1,29 @@
 { config, lib, pkgs, vars, ... }:
 
+let
+  switchCmd = ''
+    sudo nixos-rebuild switch \
+      --no-write-lock-file \
+      --refresh \
+      --flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
+  '';
+  testCmd = ''
+    sudo nixos-rebuild test \
+      --no-write-lock-file \
+      --refresh \
+      --flake git+https://${vars.lanDomain}/beatzaplenty/nixos.git#$(cat /etc/flake-target)
+  '';
+  buildImageFn = ''
+    buildImage() {
+      if [ -z "$1" ]; then
+        echo "usage: buildImage <flake-target>  (e.g. lxc-docker)" >&2
+        return 1
+      fi
+      NIXOS_HOST_KEYS_DIR="$(pwd)/host-keys" nix build --impure \
+        ".#nixosConfigurations.$1.config.system.build.tarball"
+    }
+  '';
+in
 {
   imports =
     [
@@ -8,6 +32,16 @@
       ./set-locale.nix
       ../ipa/client.nix
     ];
+
+  # System-wide shell config so all users (including IPA accounts) get the
+  # same management aliases as the local nixos user's Home Manager provides.
+  programs.bash = {
+    shellAliases = {
+      "Switch-nix" = switchCmd;
+      "Test-nix" = testCmd;
+    };
+    interactiveShellInit = buildImageFn;
+  };
   # Use the GRUB 2 boot loader.
   # boot.loader.grub.enable = true;
   #boot.loader.grub.device = "/dev/sda"; # or "nodev" for efi only

modules/ipa/client.nix

@@ -19,7 +19,7 @@
 #        sops -e --input-type binary -i secrets/<host>.keytab
 #   d. Commit secrets/<host>.keytab and the updated .sops.yaml, then deploy.
 #
-# vars dependencies: homeDomain, ipaServer, domainControllerIp
+# vars dependencies: homeDomain, ipaServer, domainControllerIp, ipaUser
 
 { config, lib, pkgs, vars, ... }:
 
@@ -62,6 +62,11 @@ lib.mkIf enabled {
     "d /usr/local 0755 root root - -"
     "d /usr/local/bin 0755 root root - -"
     "C+ /usr/local/bin/sss_ssh_authorizedkeys 0555 root root - ${pkgs.sssd}/bin/sss_ssh_authorizedkeys"
+    # Pre-create the IPA user's home dir so Home Manager activation succeeds
+    # even before their first login. On a fresh system SSSD may not have
+    # resolved the user yet — tmpfiles warns and skips in that case (non-fatal),
+    # and pam_mkhomedir covers the first-login path as a fallback.
+    "d /home/${vars.ipaUser} 0700 ${vars.ipaUser} ${vars.ipaUser} - -"
   ];
 
   services.openssh.extraConfig = ''
@@ -120,4 +125,41 @@ lib.mkIf enabled {
       '';
     };
   };
+
+  # Home Manager config for the IPA primary user, applied on every enrolled
+  # host. Manages what IPA doesn't: dotfiles, user-scoped packages, session
+  # variables. Switch-nix/Test-nix/buildImage are system-wide (configuration.nix)
+  # so they don't need to be repeated here.
+  # NixOS requires isNormalUser/isSystemUser + group on any entry in
+  # users.users. HM with useUserPackages = true (set in flake.nix) adds a stub
+  # entry for each HM user so it can install packages to
+  # /etc/profiles/per-user/<name>/. This definition satisfies those assertions.
+  # With security.ipa setting "passwd: sss files" in nsswitch, SSSD's IPA entry
+  # takes priority for NSS lookups — this local stub is only a fallback when
+  # SSSD is unreachable (at which point auth fails anyway).
+  users.users.${vars.ipaUser} = {
+    isNormalUser = true;
+    group = "users";
+    createHome = false;
+  };
+
+  # Home Manager config for the IPA primary user, applied on every enrolled
+  # host. Manages what IPA doesn't: dotfiles, user-scoped packages, session
+  # variables. Switch-nix/Test-nix/buildImage are system-wide (configuration.nix)
+  # so they don't need to be repeated here.
+  #
+  # homeDirectory uses mkForce because HM's NixOS integration module sets it to
+  # "/var/empty" for users not found in config.users.users at eval time (SSSD
+  # users aren't visible there).
+  home-manager.users.${vars.ipaUser} = { pkgs, ... }: {
+    home = {
+      username = vars.ipaUser;
+      homeDirectory = lib.mkForce "/home/${vars.ipaUser}";
+      stateVersion = "26.05";
+      packages = with pkgs; [ tmux sshfs ];
+      sessionVariables.EDITOR = "nano";
+    };
+    programs.home-manager.enable = true;
+    programs.bash.enable = true;
+  };
 }

variables.nix

@@ -80,6 +80,11 @@
   # one-line change.
   primaryUser = "nixos";
 
+  # Primary IPA/domain user. Home Manager is configured for this user on every
+  # IPA-enrolled host (see modules/ipa/client.nix) to manage the environment
+  # that IPA itself doesn't cover: dotfiles, user packages, session variables.
+  ipaUser = "wayne";
+
   # HA file server cluster
   # LAN IPs (vmbr0 / ens18) — client-facing: iSCSI initiators, NFS, management.
   # Storage IPs (vmbr1 / ens19) — isolated internal bridge, used for DRBD