nilsandClaude Sonnet 5.5
56d6e153ae
router.update.channel names the nixpkgs branch to follow (unstable or a release like 26.05). router-upgrade check compares its newest tested revision with the running one; preview locks a copy of the configuration flake to it and lists the packages that change version and the size of the download without fetching anything; download fetches it; apply takes the lock and activates with commit-confirm, the lock going back on a rollback or a failed build. router-update keeps an upgraded nixpkgs pinned. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01AeFqV9dZrK6nipHkPfyM4F
421 lines
23 KiB
Nix
421 lines
23 KiB
Nix
# A router configured by settings.json, changed and rebuilt on the device:
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# install it (its configuration directory travels with the secrets), boot it
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# without network, then
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# - rebuilding the unchanged settings gives exactly the installed system,
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# - a changed setting is built offline, activated and confirmed,
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# - an unconfirmed change is rolled back,
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# - and the same through the web UI from a LAN client: discard the
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# unapplied change, edit the DHCP pool and add a reservation, apply,
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# confirm.
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# The rest of the web UI (dashboard, backup, forms) is tested in webui.nix,
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# which needs no installed system.
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{ self, pkgs }:
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let
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inherit (pkgs) lib;
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common = import ./common.nix;
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settings = pkgs.writeText "settings.json" (
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builtins.toJSON {
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# The schema of this source: the number of migrations.
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version = lib.count (lib.hasSuffix ".jq") (builtins.attrNames (builtins.readDir ../migrations));
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system = {
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hostName = "router";
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stateVersion = "26.11";
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sshKeys = [
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"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFakeKeyForTestsOnlyXXXXXXXXXXXXXXXXXXXXXXXXXX test"
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];
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};
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router = {
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update.channel = "26.05";
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wan.interface = "eth1";
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lans.main = {
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interface = "eth2";
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internet = true;
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ipv4.address = "192.168.10.1";
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dhcp.pool = {
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start = "192.168.10.100";
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end = "192.168.10.199";
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};
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};
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};
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}
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);
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# Only so the test driver can talk to the installed system; the channel is a
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# directory, and a newer nixpkgs a copy of the installed one (made below).
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local = pkgs.writeText "local.nix" ''
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{ modulesPath, ... }:
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{
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imports = [ (modulesPath + "/testing/test-instrumentation.nix") ];
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routerSettings.upgrade = {
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channelsUrl = "file:///tmp/channels";
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nixpkgsRef = "path:/var/lib/newer-nixpkgs?lastModified=${toString self.inputs.nixpkgs.lastModified}&rev=%rev%";
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};
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}
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'';
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configDir = self.lib.mkConfigDir { inherit pkgs settings local; };
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# What the device evaluates from configDir.
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toplevel =
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(self.lib.mkRouterSystem {
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settings = "${configDir}/settings.json";
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modules = [ "${configDir}/local.nix" ];
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}).config.system.build.toplevel;
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sharedDisk = {
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virtualisation.diskImage = "./target.qcow2";
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virtualisation.diskSize = 8192;
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};
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in
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pkgs.testers.runNixOSTest {
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name = "router-apply";
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nodes = {
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installer =
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{ lib, ... }:
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{
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imports = [
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sharedDisk
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self.nixosModules.installer
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common.tools
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];
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router.installer.system = toplevel;
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virtualisation.memorySize = 2048;
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virtualisation.fileSystems."/".autoFormat = true;
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virtualisation.emptyDiskImages = [ 1024 ];
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virtualisation.rootDevice = "/dev/vdb";
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nix.settings.substituters = lib.mkForce [ ];
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};
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client =
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{ lib, ... }:
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{
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imports = [ common.tools ];
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virtualisation.vlans = [ 2 ];
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networking.interfaces.eth1.ipv4.addresses = lib.mkForce [
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{
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address = "192.168.10.50";
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prefixLength = 24;
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}
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];
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};
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target = {
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imports = [ sharedDisk ];
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# Evaluating a NixOS system takes memory.
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virtualisation.memorySize = 3072;
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virtualisation.vlans = [
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1
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2
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];
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virtualisation.useBootLoader = true;
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virtualisation.useEFIBoot = true;
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virtualisation.useDefaultFilesystems = false;
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virtualisation.efi.keepVariables = false;
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virtualisation.fileSystems."/" = {
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device = "/dev/disk/by-label/this-is-not-real-and-will-never-be-used";
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fsType = "ext4";
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};
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};
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};
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testScript = ''
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installer.start()
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installer.wait_for_unit("multi-user.target")
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installer.succeed("mkdir -p /root/secrets && cp -r ${configDir} /root/secrets/config")
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installer.succeed("router-install --yes --secrets /root/secrets /dev/vda >&2")
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installer.shutdown()
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target.state_dir = installer.state_dir
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target.start()
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target.wait_for_unit("multi-user.target")
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import json
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def current():
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return target.succeed("readlink -f /run/current-system").strip()
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def pool_end():
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return target.succeed("grep -o '192.168.10.100 - 192.168.10.[0-9]*' /etc/kea/dhcp4-server.conf").split()[-1]
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with subtest("the installed system is the one built from the settings"):
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assert current() == "${toplevel}"
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target.succeed("test -f /var/lib/router/config/settings.json")
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with subtest("rebuilding unchanged settings on the device changes nothing"):
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out = target.succeed("router-apply 2>&1")
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assert "no changes" in out, out
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with subtest("a changed setting is built offline, activated and confirmed"):
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target.succeed("sed -i 's/192.168.10.199/192.168.10.150/' /var/lib/router/config/settings.json")
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target.succeed("router-apply 5min >&2")
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assert current() != "${toplevel}"
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assert pool_end() == "192.168.10.150"
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target.succeed("systemctl is-active router-rollback.timer")
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target.succeed("router-confirm >&2")
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target.fail("systemctl is-active router-rollback.timer")
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confirmed = current()
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assert target.succeed("readlink -f /nix/var/nix/profiles/system").strip() == confirmed
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with subtest("an unconfirmed change is rolled back"):
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target.succeed("sed -i 's/192.168.10.150/192.168.10.120/' /var/lib/router/config/settings.json")
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target.succeed("router-apply 20s >&2")
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assert pool_end() == "192.168.10.120"
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target.wait_until_succeeds(f"test $(readlink -f /run/current-system) = {confirmed}", timeout=120)
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assert pool_end() == "192.168.10.150"
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ui = "https://192.168.10.1"
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def curl(args):
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return client.succeed(f"curl -sk -b /tmp/jar -c /tmp/jar {args}")
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def csrf(path):
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return curl(f"{ui}{path} | grep -o 'name=\"csrf\" value=\"[^\"]*' | head -1 | cut -d'\"' -f4").strip()
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with subtest("the web UI is reachable from the LAN and wants the password"):
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target.succeed("echo hunter2hunter2 | router-webui passwd /var/lib/router/webui-password")
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target.wait_for_unit("router-webui.service")
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client.start()
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client.wait_until_succeeds(f"curl -sk -o /dev/null {ui}/login", timeout=60)
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assert curl(f"-o /dev/null -w '%{{http_code}}' -d password=wrong {ui}/login") == "401"
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assert curl(f"-o /dev/null -w '%{{http_code}}' -d password=hunter2hunter2 {ui}/login") == "303"
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with subtest("the web UI shows the rolled back change as unapplied and discards it"):
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page = curl(f"{ui}/")
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assert "not part of the confirmed system" in page, page
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token = csrf("/")
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curl(f"-d csrf={token} {ui}/discard")
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assert "192.168.10.150" in target.succeed("cat /var/lib/router/config/settings.json")
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assert "match the confirmed system" in curl(f"{ui}/")
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with subtest("a pool change and a reservation made in the web UI are applied and confirmed"):
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token = csrf("/network")
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form = " ".join(f"--data-urlencode '{k}={v}'" for k, v in {
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"csrf": token, "hostName": "router", "wan.interface": "eth1", "wan.type": "dhcp",
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"lans": "1", "lan.0.name": "main", "lan.0.interface": "eth2", "lan.0.address": "192.168.10.1",
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"lan.0.internet": "on", "lan.0.dhcp": "on",
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"lan.0.poolStart": "192.168.10.100", "lan.0.poolEnd": "192.168.10.130",
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}.items())
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assert curl(f"-o /dev/null -w '%{{http_code}}' -X POST {ui}/network") == "403"
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assert curl(f"-o /dev/null -w '%{{http_code}}' {form} {ui}/network") == "303"
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# A reservation too: one apply for both changes.
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reservation = " ".join(f"--data-urlencode '{k}={v}'" for k, v in {
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"csrf": csrf("/dhcp"), "rows": "1", "res.0.lan": "main", "res.0.name": "printer",
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"res.0.mac": "AA:BB:CC:00:11:22", "res.0.address": "192.168.10.60",
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}.items())
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assert curl(f"-o /dev/null -w '%{{http_code}}' {reservation} {ui}/dhcp") == "303"
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curl(f"-d csrf={csrf('/')} {ui}/apply")
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target.wait_until_succeeds("test $(systemctl show -p ActiveState --value router-apply.service) = inactive"
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" && test $(systemctl show -p Result --value router-apply.service) = success", timeout=600)
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assert pool_end() == "192.168.10.130"
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target.succeed("grep -q 'aa:bb:cc:00:11:22' /etc/kea/dhcp4-server.conf && grep -q '192.168.10.60' /etc/kea/dhcp4-server.conf")
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assert "Waiting for confirmation" in curl(f"{ui}/")
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curl(f"-d csrf={csrf('/')} {ui}/confirm")
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target.wait_until_fails("systemctl is-active router-rollback.timer", timeout=60)
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target.wait_until_succeeds("test $(systemctl show -p ActiveState --value router-confirm.service) = inactive")
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assert target.succeed("readlink -f /nix/var/nix/profiles/system").strip() == current()
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assert "match the confirmed system" in curl(f"{ui}/")
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with subtest("naming the network cards in the web UI is staged for the next boot"):
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before = current()
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mac = {n: target.succeed(f"cat /sys/class/net/{n}/address").strip() for n in ("eth1", "eth2")}
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names = " ".join(f"--data-urlencode '{k}={v}'" for k, v in {
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"csrf": csrf("/network"), "rows": "2",
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"dev.0": "eth1", "mac.0": mac["eth1"], "from.0": "eth1", "name.0": "wan",
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"dev.1": "eth2", "mac.1": mac["eth2"], "from.1": "eth2", "name.1": "lan",
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}.items())
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assert curl(f"-o /dev/null -w '%{{http_code}}' {names} {ui}/interfaces") == "303"
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# The settings follow the names at once; the system does not.
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saved = target.succeed("cat /var/lib/router/config/settings.json")
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assert '"interface": "lan"' in saved and '"interface": "wan"' in saved and mac["eth2"] in saved, saved
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assert "after the next reboot" in curl(f"{ui}/network")
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curl(f"-d csrf={csrf('/')} {ui}/apply")
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target.wait_until_succeeds("test $(systemctl show -p ActiveState --value router-apply.service) = inactive"
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" && test $(systemctl show -p Result --value router-apply.service) = success", timeout=600)
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assert current() == before
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target.fail("systemctl is-active router-rollback.timer")
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staged = target.succeed("readlink -f /nix/var/nix/profiles/system").strip()
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assert staged != before
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target.succeed(f"grep -q '^nic {mac['eth2']} lan$' {staged}/etc/router/interface-names")
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target.succeed("ip link show eth2")
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# The overview samples the system every few seconds.
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client.wait_until_succeeds(f"curl -sk -b /tmp/jar {ui}/ | grep -c 'starts at the next reboot' >/dev/null", timeout=60)
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with subtest("after the reboot the cards have their names and the router works"):
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target.shutdown()
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target.start()
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target.wait_for_unit("multi-user.target")
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target.succeed("ip link show wan && ip link show lan")
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target.fail("ip link show eth1")
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target.wait_until_succeeds("ip -4 addr show dev lan | grep -q 192.168.10.1/24")
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target.wait_for_unit("kea-dhcp4-server.service")
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target.wait_for_unit("router-webui.service")
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client.wait_until_succeeds(f"curl -sk -o /dev/null {ui}/login", timeout=120)
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assert "match the confirmed system" in curl(f"-d password=hunter2hunter2 -L {ui}/login")
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assert "starts at the next reboot" not in curl(f"{ui}/")
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with subtest("an assistant with a change token edits and checks the settings through MCP"):
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secret = curl(f"-d csrf={csrf('/tokens')} -d name=assistant -d scope=change {ui}/tokens | grep -o 'rtr_[A-Za-z0-9_-]*' | sed -n 1p").strip()
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assert secret.startswith("rtr_"), secret
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def mcp(tool, args=None, token=secret):
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body = json.dumps({"jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": {"name": tool, "arguments": args or {}}})
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out = client.succeed(f"curl -sk -H 'Authorization: Bearer {token}' -d '{body}' {ui}/mcp")
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res = json.loads(out)["result"]
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return res["content"][0]["text"], res.get("isError", False)
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assert client.succeed(f"curl -sk -o /dev/null -w '%{{http_code}}' -d '{{}}' {ui}/mcp").strip() == "401"
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text, failed = mcp("get_settings")
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got = json.loads(text)
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assert not failed and got["settings"]["router"]["lans"]["main"], text
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assert "WAN" in mcp("list_interfaces")[0]
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assert json.loads(mcp("get_status")[0])["uplink"] is not None
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# A bad pool: saved, not applied, and the check reports the router's assertion.
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text, failed = mcp("update_settings", {"etag": got["etag"], "patch": {"router": {"lans": {"main": {"dhcp": {"pool": {"end": "10.9.9.9"}}}}}}})
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assert not failed and '"applied": false' in text, text
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text, failed = mcp("check_settings")
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for _ in range(20):
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if "running" not in text:
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break
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text, failed = mcp("check_settings")
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res = json.loads(text)
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assert res["ok"] is False and "pool is not inside" in res["error"], text
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assert current() == target.succeed("readlink -f /nix/var/nix/profiles/system").strip()
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assert "10.9.9.9" in mcp("get_pending_changes")[0]
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# Discarded, the settings evaluate again.
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assert not mcp("discard_changes")[1]
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text, failed = mcp("check_settings")
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for _ in range(20):
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if "running" not in text:
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break
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text, failed = mcp("check_settings")
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assert json.loads(text)["ok"] is True, text
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# The journal can be read, through MCP and through the REST API (same tokens).
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text, failed = mcp("get_logs", {"unit": "router-webui", "lines": 5})
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assert not failed and "router-webui" in text, text
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text, failed = mcp("get_logs", {"unit": "--vacuum-time=1s"})
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assert failed, text
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rest = f"curl -sk -H 'Authorization: Bearer {secret}'"
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assert "router-webui" in client.succeed(f"{rest} '{ui}/api/v1/logs?unit=router-webui&lines=5'")
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assert json.loads(client.succeed(f"{rest} {ui}/api/v1/status"))["uplink"] is not None
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assert client.succeed(f"{rest} -o /dev/null -w '%{{http_code}}' -X PATCH -d '{{}}' {ui}/api/v1/settings").strip() == "400"
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assert client.succeed(f"curl -sk -o /dev/null -w '%{{http_code}}' {ui}/api/v1/status").strip() == "401"
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spec = json.loads(client.succeed(f"curl -sk {ui}/api/openapi.json"))
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assert spec["openapi"].startswith("3.") and "/api/v1/logs" in spec["paths"]
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# Areas of the settings, typed by the real option documentation.
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area = f"{rest} -H 'Content-Type: application/json'"
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etag = client.succeed(f"{rest} -D - -o /dev/null {ui}/api/v1/settings/router/lans/main | tr -d '\\r' | sed -n 's/^[Ee][Tt]ag: *//p'").strip()
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assert etag, "no ETag from an area"
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assert json.loads(client.succeed(f"{rest} {ui}/api/v1/settings/router/lans/main"))["interface"]
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code = client.succeed(f"{area} -o /tmp/area.json -w '%{{http_code}}' -X PUT -H 'If-Match: {etag}' -d '{{\"domian\": \"x\"}}' {ui}/api/v1/settings/router/dns").strip()
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assert code == "400" and "unknown option" in client.succeed("cat /tmp/area.json"), code
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code = client.succeed(f"{area} -o /tmp/area.json -w '%{{http_code}}' -X PUT -H 'If-Match: {etag}' -d '{{\"domain\": \"area.test\"}}' {ui}/api/v1/settings/router/dns").strip()
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assert code == "200", (code, client.succeed("cat /tmp/area.json"))
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assert "area.test" in mcp("get_pending_changes")[0]
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assert not mcp("discard_changes")[1]
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spec = json.loads(client.succeed(f"curl -sk {ui}/api/openapi.json"))
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assert "/api/v1/settings/router/lans/{name}" in spec["paths"]
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# The log shows what was done, by whom.
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assert "update_settings" in curl(f"{ui}/tokens") and "assistant" in curl(f"{ui}/tokens")
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# "A newer nixpkgs": the installed one, copied, and told it is the revision
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# the channel names (the running one). A different nixpkgs could not be
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# built here (even a changed version rebuilds the NixOS tools), so what is
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# tested is everything around the build.
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target.succeed("cp -r ${self.inputs.nixpkgs} /var/lib/newer-nixpkgs")
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running_version = target.succeed("cat /run/current-system/nixos-version")
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running_rev = "${self.inputs.nixpkgs.rev}"
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def channel(rev):
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target.succeed(f"mkdir -p /tmp/channels/nixos-26.05 && printf %s {rev} > /tmp/channels/nixos-26.05/git-revision")
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with subtest("router-upgrade check needs a channel and a reachable revision"):
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rc, out = target.execute("router-upgrade check 2>&1")
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assert rc != 0 and "cannot read" in out, out
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channel("not-a-revision")
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rc, out = target.execute("router-upgrade check 2>&1")
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assert rc != 0 and "unexpected answer" in out, out
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target.succeed("jq 'del(.router.update)' /var/lib/router/config/settings.json > /tmp/s.json && cp /var/lib/router/config/settings.json /tmp/settings.orig && cp /tmp/s.json /var/lib/router/config/settings.json")
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rc, out = target.execute("router-upgrade check 2>&1")
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assert rc != 0 and "no channel" in out, out
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target.succeed("cp /tmp/settings.orig /var/lib/router/config/settings.json")
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rc, out = target.execute("router-upgrade apply 2>&1")
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assert rc != 0 and "nothing is previewed" in out, out
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with subtest("a newer revision is reported, the running one is up to date"):
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rev = "0123456789abcdef0123456789abcdef01234567"
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channel(rev)
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out = target.succeed("router-upgrade check 2>&1")
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assert "a newer revision is available" in out, out
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assert json.loads(target.succeed("cat /var/lib/router/upgrade/check.json"))["upToDate"] is False
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channel(running_rev)
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out = target.succeed("router-upgrade check 2>&1")
|
|
assert "up to date" in out, out
|
|
assert json.loads(target.succeed("cat /var/lib/router/upgrade/check.json"))["upToDate"] is True
|
|
out = target.succeed("router-upgrade preview 2>&1")
|
|
assert "up to date" in out, out
|
|
target.succeed("test ! -e /var/lib/router/upgrade/preview.json")
|
|
|
|
with subtest("a preview lists the changes and the download without fetching or touching anything"):
|
|
before = current()
|
|
out = target.succeed("router-upgrade preview --force 2>&1")
|
|
assert "no package changes" in out and "to fetch:" in out, out
|
|
preview = json.loads(target.succeed("cat /var/lib/router/upgrade/preview.json"))
|
|
assert preview["rev"] == running_rev and preview["version"] == running_version and preview["changes"] == [], preview
|
|
assert preview["ref"].startswith("path:/var/lib/newer-nixpkgs?") and "rev=" + running_rev in preview["ref"] and "narHash=sha256-" in preview["ref"], preview
|
|
assert preview["rebootNeeded"] is False and preview["builds"] == 0, preview
|
|
target.succeed("test ! -e /var/lib/router/upgrade/result")
|
|
assert current() == before
|
|
target.succeed("test ! -e /var/lib/router/config/nixpkgs-pin.json")
|
|
|
|
with subtest("the package list names what changes in version, and only that"):
|
|
target.succeed("printf '%s\\n' linux-6.12.5 openssl-3.4.1 openssl-3.4.1-bin zlib-1.3.1 frr-10.1 ripgrep-14.1 rg-1.0 glibc-2.40-66 glibc-2.40-66-getent > /tmp/old")
|
|
target.succeed("printf '%s\\n' linux-6.12.8 openssl-3.4.2 zlib-1.3.1 zlib-1.3.2 frr-10.2 cmake-4.0 bash-5.3 glibc-2.40-66 foo-1.tar.gz > /tmp/new")
|
|
target.succeed("sed -n '/^changes() {/,/^}/p' /run/current-system/sw/bin/router-upgrade > /tmp/changes.sh && test -s /tmp/changes.sh")
|
|
out = target.succeed("bash -c 'source /tmp/changes.sh; changes /tmp/old /tmp/new' | jq -c 'map(.name + \":\" + .from + \">\" + .to)'")
|
|
assert json.loads(out) == ["frr:10.1>10.2", "linux:6.12.5>6.12.8", "openssl:3.4.1>3.4.2"], out
|
|
|
|
with subtest("an upgrade that is not confirmed is rolled back, the lock and the pin included"):
|
|
lock = target.succeed("cat /var/lib/router/config/flake.lock")
|
|
# The packages are the same, so there is nothing to activate unless the
|
|
# settings changed too (an upgrade applies what is saved, as `router-apply` does).
|
|
target.succeed("grep -q 192.168.10.130 /var/lib/router/config/settings.json && sed -i 's/192.168.10.130/192.168.10.140/' /var/lib/router/config/settings.json")
|
|
target.succeed("router-upgrade download >&2")
|
|
target.succeed("test -e /var/lib/router/upgrade/result")
|
|
target.succeed("router-upgrade apply 20s >&2")
|
|
assert current() != before
|
|
target.succeed("systemctl is-active router-rollback.timer")
|
|
assert json.loads(target.succeed("cat /var/lib/router/config/nixpkgs-pin.json"))["rev"] == running_rev
|
|
target.succeed("test ! -e /var/lib/router/upgrade/preview.json && test ! -e /var/lib/router/upgrade/result")
|
|
target.wait_until_succeeds(f"test $(readlink -f /run/current-system) = {before}", timeout=180)
|
|
target.succeed("test ! -e /var/lib/router/config/nixpkgs-pin.json && test ! -e /var/lib/router/config.pre-update")
|
|
assert target.succeed("cat /var/lib/router/config/flake.lock") == lock
|
|
|
|
with subtest("a confirmed upgrade stays, pins nixpkgs and rebuilds to exactly itself"):
|
|
target.succeed("router-upgrade preview --force >&2")
|
|
target.succeed("router-upgrade apply 5min >&2")
|
|
target.succeed("router-confirm >&2")
|
|
target.fail("systemctl is-active router-rollback.timer")
|
|
upgraded = current()
|
|
assert upgraded != before
|
|
assert target.succeed("readlink -f /nix/var/nix/profiles/system").strip() == upgraded
|
|
assert json.loads(target.succeed("cat /var/lib/router/config/nixpkgs-pin.json"))["rev"] == running_rev
|
|
assert "newer-nixpkgs" in target.succeed("cat /var/lib/router/config/flake.lock")
|
|
target.succeed("test ! -e /var/lib/router/config.pre-update")
|
|
assert "no changes" in target.succeed("router-apply 2>&1")
|
|
|
|
with subtest("an upgrade that fails to build puts the configuration back"):
|
|
channel("fedcba9876543210fedcba9876543210fedcba98")
|
|
target.succeed("router-upgrade preview >&2")
|
|
pin = target.succeed("cat /var/lib/router/config/nixpkgs-pin.json")
|
|
# An unknown option, after the preview: the build of the apply fails.
|
|
target.succeed("cp /var/lib/router/config/settings.json /tmp/settings.good && jq '.router.nonsense = true' /tmp/settings.good > /var/lib/router/config/settings.json")
|
|
rc, out = target.execute("router-upgrade apply 5min 2>&1")
|
|
assert rc != 0 and "the upgrade failed" in out, out
|
|
assert target.succeed("cat /var/lib/router/config/nixpkgs-pin.json") == pin
|
|
target.succeed("test ! -e /var/lib/router/config.pre-update")
|
|
target.succeed("cp /tmp/settings.good /var/lib/router/config/settings.json")
|
|
assert current() == upgraded
|
|
'';
|
|
}
|