Archived
beatzaplentyandClaude Sonnet 4.6
2f829ba3e7
Check NixOS configurations / eval-hosts (pull_request) Failing after 9m48s
modules/ipa/client.nix is now a self-contained NixOS module (no longer a parameterized function): it checks builtins.pathExists for secrets/<hostname>.keytab at eval time and enables itself automatically if found, making it a no-op for hosts without a keytab. modules/common/configuration.nix imports it so every host in the flake is a candidate for IPA enrollment — no per-host wiring needed. Adding a keytab (via scripts/ipa/create-nixos-ipa-host-account.sh) is now the only step required to enroll a host. The module also sets networking.domain and networking.nameservers via mkDefault when active, so new hosts don't need those set explicitly. Also: - Remove explicit IPA imports from hosts/nix-cache and hosts/tailscale-router - Add secrets/pxe-boot.keytab + creation rule; remove incorrect secrets/nixos.sweet.home.keytab and its creation rule - Add .sops.yaml creation rules for all remaining host keytabs (server, docker, tor-relay, nix-minimal, nixos) so the creation script can target them without manual .sops.yaml edits - Fix duplicate tailscale-router.keytab rule and corrupted gui.yaml comment block in .sops.yaml Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
90 lines
3.6 KiB
Nix
90 lines
3.6 KiB
Nix
# Fully declarative FreeIPA domain membership.
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#
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# Imported by modules/common/configuration.nix — no per-host wiring needed.
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# Enables itself automatically on any host that has a sops-encrypted keytab
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# at secrets/<hostname>.keytab; is a no-op for all other hosts.
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#
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# To enroll a new host:
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# 0. scripts/secrets/sync-host-keys.sh <flake-target>
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# 1. scripts/ipa/create-nixos-ipa-host-account.sh [--ip <addr>] <hostname>
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# (adds .sops.yaml rule, runs ipa host-add, encrypts keytab in one step)
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# 2. git add secrets/<hostname>.keytab .sops.yaml && git commit
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# 3. Deploy — no further steps required.
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#
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# Manual fallback (if the script isn't usable):
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# a. On the FreeIPA server: ipa host-add <fqdn> [--ip-address=<ip>] --force
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# b. On the FreeIPA server: ipa-getkeytab -s <ipa-server> -p host/<fqdn> -k /tmp/<host>.keytab
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# c. From the repo root (path must match for sops creation rule to apply):
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# cp /tmp/<host>.keytab secrets/<host>.keytab
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# sops -e --input-type binary -i secrets/<host>.keytab
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# d. Commit secrets/<host>.keytab and the updated .sops.yaml, then deploy.
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#
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# vars dependencies: homeDomain, ipaServer, domainControllerIp
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{ config, lib, pkgs, vars, ... }:
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let
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keytabPath = ../../secrets + "/${config.networking.hostName}.keytab";
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enabled = builtins.pathExists keytabPath;
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realm = lib.strings.toUpper vars.homeDomain;
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fqdn = "${config.networking.hostName}.${vars.homeDomain}";
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# "sweet.home" -> "dc=sweet,dc=home"
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basedn = lib.strings.concatMapStringsSep "," (c: "dc=${c}") (lib.strings.splitString "." vars.homeDomain);
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# security.ipa.certificate expects a derivation (package), not a raw path.
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caCertPkg = pkgs.writeText "ipa-ca.crt" (builtins.readFile ../../certs/ipa-ca.crt);
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in
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lib.mkIf enabled {
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networking.domain = lib.mkDefault vars.homeDomain;
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networking.nameservers = lib.mkDefault [ vars.domainControllerIp ];
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security.ipa = {
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enable = true;
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domain = vars.homeDomain;
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realm = realm;
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server = vars.ipaServer;
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certificate = caCertPkg;
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basedn = basedn;
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ipaHostname = fqdn;
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offlinePasswords = true;
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cacheCredentials = true;
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};
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# Fetch SSH public keys from IPA so users can log in with the key stored
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# in their IPA profile rather than needing ~/.ssh/authorized_keys on every
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# host. sss_ssh_authorizedkeys queries SSSD (which queries IPA LDAP).
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#
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# /nix/store is 1775 (group-writable by nixbld). OpenSSH 10.0+ rejects
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# AuthorizedKeysCommand binaries whose path contains any group-writable
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# component, silently skipping the command. Copy to /usr/local/bin (all
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# components root-owned, 755) so the path passes sshd's safety check.
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systemd.tmpfiles.rules = [
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"d /usr/local 0755 root root - -"
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"d /usr/local/bin 0755 root root - -"
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"C+ /usr/local/bin/sss_ssh_authorizedkeys 0555 root root - ${pkgs.sssd}/bin/sss_ssh_authorizedkeys"
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];
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services.openssh.extraConfig = ''
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AuthorizedKeysCommand /usr/local/bin/sss_ssh_authorizedkeys %u
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AuthorizedKeysCommandUser nobody
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'';
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# Create the home directory on first login if it doesn't exist yet.
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# IPA users have no pre-created home on the host; without this sshd
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# opens a session to a non-existent directory and resets the connection.
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security.pam.services.sshd.makeHomeDir = true;
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# Host keytab: pre-provisioned on the IPA server, sops-encrypted binary.
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# Placed at /etc/krb5.keytab before SSSD starts so the host authenticates
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# to IPA without running ipa-client-install.
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sops.secrets."ipa-host-keytab" = {
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sopsFile = keytabPath;
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format = "binary";
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path = "/etc/krb5.keytab";
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owner = "root";
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group = "root";
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mode = "0600";
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restartUnits = [ "sssd.service" ];
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};
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}
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