Merge pull request 'Worktree ipa client module' (#80) from worktree-ipa-client-module into main

Reviewed-on: #80

.sops.yaml

@@ -127,6 +127,16 @@ creation_rules:
   # scripts/secrets/sync-host-keys.sh yet, so whichever variant is actually
   # deployed next needs its recipient added here (and `sops updatekeys` rerun)
   # before it can decrypt this.
+  # Host keytab for tailscale-router FreeIPA enrollment (binary sops file).
+  # Generated by scripts/ipa/create-nixos-ipa-host-account.sh.
+  - path_regex: secrets/tailscale-router\.keytab$
+    key_groups:
+      - age:
+          - *admin
+          - *lxc-tailscale-router
+          - *proxmox-tailscale-router
+          - *linode-tailscale-router
+
   - path_regex: secrets/gui\.yaml$
     key_groups:
       - age:

hosts/tailscale-router/host.nix

@@ -8,13 +8,13 @@
     })
     (import ../../modules/ipa/client.nix {
       keytabSopsFile = ../../secrets/tailscale-router.keytab;
-      caCertFile     = ../../certs/ipa-ca.crt;
+      caCertFile = ../../certs/ipa-ca.crt;
     })
-
   ];
 
   networking = {
     hostName = "tailscale-router";
+    domain = vars.homeDomain;
     useDHCP = false;
     interfaces.${vars.lxcLanInterface}.ipv4.addresses = [{
       address = vars.tailscaleRouterIp;

modules/build-types/gui.nix

@@ -1,6 +1,17 @@
 { config, pkgs, lib, inputs, vars, ... }:
 
 {
+  imports = [
+    ../docker/enable-service.nix
+  ];
+
+  nixpkgs.overlays = [
+    (final: prev: {
+      docker = prev.docker_29;
+      docker_cli = prev.docker_29;
+    })
+  ];
+
   environment.systemPackages = with pkgs; [
     inputs.nixos-conf-editor.packages.${pkgs.stdenv.hostPlatform.system}.nixos-conf-editor
     nodejs
@@ -18,7 +29,7 @@
   ];
 
   boot.loader.grub.useOSProber = true;
-programs.direnv.enable = true;
+  programs.direnv.enable = true;
   services = {
     xserver = {
       enable = true;

modules/docker/enable-service.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }:
+{ pkgs, vars, ... }:
 
 {
   #  virtualisation.docker.enable = true;
@@ -15,7 +15,7 @@
     #    experimental = true;
     #  };
   };
-
+  users.users.${vars.primaryUser}.extraGroups = [ "docker" ];
   environment.systemPackages = with pkgs; [
     docker-compose
     docker-buildx

modules/ipa/client.nix

@@ -60,6 +60,30 @@ in
     cacheCredentials = true;
   };
 
+  # Fetch SSH public keys from IPA so users can log in with the key stored
+  # in their IPA profile rather than needing ~/.ssh/authorized_keys on every
+  # host. sss_ssh_authorizedkeys queries SSSD (which queries IPA LDAP).
+  #
+  # /nix/store is 1775 (group-writable by nixbld). OpenSSH 10.0+ rejects
+  # AuthorizedKeysCommand binaries whose path contains any group-writable
+  # component, silently skipping the command. Copy to /usr/local/bin (all
+  # components root-owned, 755) so the path passes sshd's safety check.
+  systemd.tmpfiles.rules = [
+    "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"
+  ];
+
+  services.openssh.extraConfig = ''
+    AuthorizedKeysCommand /usr/local/bin/sss_ssh_authorizedkeys %u
+    AuthorizedKeysCommandUser nobody
+  '';
+
+  # Create the home directory on first login if it doesn't exist yet.
+  # IPA users have no pre-created home on the host; without this sshd
+  # opens a session to a non-existent directory and resets the connection.
+  security.pam.services.sshd.makeHomeDir = true;
+
   # Host keytab: pre-provisioned on the IPA server, sops-encrypted binary.
   # Placed at /etc/krb5.keytab before SSSD starts so the host authenticates
   # to IPA without running ipa-client-install.