232 lines
9.3 KiB
Nix
232 lines
9.3 KiB
Nix
# The swarm notification router, in a `swarm-notify-router` container on the
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# host that sets `deploy.notify-router.enable`, which `deploy.allSwarmServices`
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# defaults on where the host has the router's store identity. It reads the
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# forge events swarm-controller keeps from its webhooks and queues todo ops on
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# each agent's subject of `ROUTER_TODOS`, which the agent's harness applies.
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# docs/swarm/notify-router.md has the design.
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#
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# Its own network namespace on the bridge, as ./swarm-claude-login.nix has: it
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# reaches the swarm services by name and nothing on the host's loopback. It
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# talks only to the queue, the store and authelia, so it can run on any host.
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#
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# The container holds one credential, its own store leaf, which nspawn hands in
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# as a system credential with no copy on disk. The daemon reads its queue
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# client secret with it.
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{
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pkgs,
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lib,
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config,
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...
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}:
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let
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hyperhiveCfg = config.services.hyperhive;
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cfg = hyperhiveCfg.deploy.notify-router;
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baoCfg = hyperhiveCfg.swarm.bao;
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baoDeploy = hyperhiveCfg.deploy.bao;
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natsCfg = hyperhiveCfg.swarm.nats;
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autheliaCfg = hyperhiveCfg.swarm.authelia;
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gatewayCfg = hyperhiveCfg.gateway;
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networkCfg = hyperhiveCfg.network;
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tlsCfg = hyperhiveCfg.deploy.hive-controller.tls;
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machine = "swarm-notify-router";
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unit = "swarm-notify-router";
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clientId = hyperhiveCfg.swarm.notify-router.clientId;
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# The container's journal forwarder pushes to its own receiver on the swarm
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# collector, the route `serviceProducers.swarm-notify-router` in
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# ./swarm-otel-service.nix declares, as ./swarm-claude-login.nix does.
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swarmOtelCfg = hyperhiveCfg.swarm.otel;
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forwarderEndpoint = "https://${swarmOtelCfg.domain}/${machine}";
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forwarderUnit = "swarm-journal-forwarder-oidc";
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# Loopback in the container's own netns, and distinct from the other service
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# containers' forwarders all the same.
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forwarderTelemetryPort = 8902;
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# The daemon reaches authelia, the store and the queue by name over TLS, and
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# in self-signed mode their leaves chain to the hive CA.
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caTrust = import ./lib/hive-ca-trust.nix { inherit lib tlsCfg gatewayCfg; };
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caBundleModule = caTrust.trustBundle {
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inherit pkgs;
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name = machine;
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consumers = [
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unit
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# Go: `SSL_CERT_FILE` replaces its trust store, for the swarm
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# collector's and authelia's names.
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"opentelemetry-collector"
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];
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};
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haveClientIdentity =
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baoDeploy.notifyRouterClientCertFile != null && baoDeploy.notifyRouterClientKeyFile != null;
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# Credential id → host source, as ./swarm-claude-login.nix hands its leaf in.
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storeFiles = lib.filterAttrs (_: source: source != null) {
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notify-router-bao-cert = baoDeploy.notifyRouterClientCertFile;
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notify-router-bao-key = baoDeploy.notifyRouterClientKeyFile;
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notify-router-bao-server-ca = baoDeploy.serverCaFile;
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};
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# nixos-container expands `extraFlags` unquoted, so a source path must be
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# one word.
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oneWord = path: builtins.match ".*[[:space:]].*" path == null;
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credential = id: "/run/credentials/${unit}.service/${id}";
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forwarderCredential = id: "/run/credentials/${forwarderUnit}.service/${id}";
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privateNetwork = true;
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in
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{
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options.services.hyperhive.swarm.notify-router.clientId = lib.mkOption {
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type = lib.types.str;
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readOnly = true;
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default = "swarm-notify-router";
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description = ''
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The OAuth2 client id the notification router presents to the swarm
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queue. Read-only: the host running authelia registers it, the queue's
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auth-callout responder grants it the router's subjects, and the secret
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publisher carries its secret to the store, all from this one value.
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'';
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};
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options.services.hyperhive.deploy.notify-router.package = lib.mkOption {
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type = lib.types.package;
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defaultText = lib.literalExpression "hyperhive.packages.\${system}.swarm-notify-router";
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description = "The notification router daemon package.";
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};
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config = lib.mkIf cfg.enable {
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assertions = [
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{
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assertion = haveClientIdentity;
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message = ''
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services.hyperhive.deploy.notify-router.enable requires the router's
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swarm-secret-store client identity: set both
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services.hyperhive.deploy.bao.notifyRouterClientCertFile
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services.hyperhive.deploy.bao.notifyRouterClientKeyFile
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The router reads its queue client secret with it.
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Both default to the pair glue-bao-tls.nix mints when
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services.hyperhive.deploy.bao.enable is true (the host that runs the
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store). Otherwise copy notify-router.pem and notify-router-key.pem
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from the store host's /var/lib/swarm-bao-pki/ and name them in those
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two options.
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'';
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}
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{
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assertion = lib.all oneWord (lib.attrValues storeFiles);
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message = ''
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The notification router's store identity paths must not contain
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whitespace: nspawn's --load-credential receives them through
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nixos-container's unquoted extra flags.
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'';
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}
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];
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# The container hangs off the bridge, takes its address from the gateway's
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# DHCP and resolves through its dnsmasq.
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services.hyperhive.network.enable = lib.mkDefault true;
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services.hyperhive.gateway.enable = lib.mkDefault true;
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services.hyperhive.gateway.dns.enable = lib.mkDefault true;
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# nspawn fails to start the container when a credential source is
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# missing, so where this host mints the leaf the container waits for it.
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systemd.services."container@${machine}" = lib.mkMerge [
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caTrust.containerOrdering
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{ after = [ "swarm-bao-pki.service" ]; }
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];
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containers.${machine} = {
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autoStart = true;
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# The daemon keeps its state in the queue: its consumer's position and
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# its per-issue snapshots.
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ephemeral = false;
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# No `--link-journal=host`: the journal stays in the guest, where the
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# container's own forwarder reads it (../container-modules/swarm-journal-forwarder.nix).
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extraFlags = lib.mapAttrsToList (id: source: "--load-credential=${id}:${source}") storeFiles;
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inherit privateNetwork;
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hostBridge = networkCfg.bridgeName;
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bindMounts = caTrust.bindMount;
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config =
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{ lib, ... }:
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{
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imports = [
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../container-modules/swarm-container.nix
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../container-modules/swarm-journal-forwarder.nix
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caBundleModule
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];
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services.hyperhive.swarmContainer = {
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inherit privateNetwork;
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writesOwnResolvConf = false;
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};
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networking.nameservers = [ networkCfg.bridgeIp ];
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networking.interfaces.eth0.useDHCP = true;
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users.users.${unit} = {
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isSystemUser = true;
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group = unit;
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};
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users.groups.${unit} = { };
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# Authenticated as the daemon's own OIDC client, whose secret its
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# store identity already reads: one identity for the whole container.
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services.hyperhive.swarmJournalForwarder = {
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enable = true;
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serviceName = "notify-router";
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endpoint = forwarderEndpoint;
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inherit clientId;
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tokenUrl = "${autheliaCfg.url}/api/oidc/token";
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telemetryPort = forwarderTelemetryPort;
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store = {
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package = baoDeploy.package;
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addr = "https://${baoCfg.domain}:${toString baoCfg.port}";
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secretPath = "secret/swarm/services/${clientId}/oidc/client";
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clientCertFile = forwarderCredential "notify-router-bao-cert";
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clientKeyFile = forwarderCredential "notify-router-bao-key";
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caFile =
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if storeFiles ? notify-router-bao-server-ca then
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forwarderCredential "notify-router-bao-server-ca"
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else
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null;
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};
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};
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systemd.services.${forwarderUnit}.serviceConfig.LoadCredential = lib.attrNames storeFiles;
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systemd.services.${unit} = {
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description = "route forge events to agents' todo lists";
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wantedBy = [ "multi-user.target" ];
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wants = [ "network-online.target" ];
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after = [ "network-online.target" ];
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environment = {
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BAO_ADDR = "https://${baoCfg.domain}:${toString baoCfg.port}";
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BAO_CLIENT_CERT = credential "notify-router-bao-cert";
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BAO_CLIENT_KEY = credential "notify-router-bao-key";
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SWARM_NOTIFY_ROUTER_NATS_URL = "tls://${natsCfg.domain}:${toString natsCfg.port}";
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SWARM_NOTIFY_ROUTER_OIDC_TOKEN_ENDPOINT = "${autheliaCfg.url}/api/oidc/token";
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SWARM_NOTIFY_ROUTER_OIDC_CLIENT_ID = clientId;
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}
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// lib.optionalAttrs (storeFiles ? notify-router-bao-server-ca) {
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BAO_CACERT = credential "notify-router-bao-server-ca";
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}
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// lib.optionalAttrs caTrust.useSelfSigned {
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SWARM_NOTIFY_ROUTER_OIDC_CA_FILE = caTrust.bundlePathFor machine;
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};
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serviceConfig = {
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ExecStart = "${cfg.package}/bin/swarm-notify-router";
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User = unit;
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Group = unit;
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UMask = "0077";
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# Bare ids: the system credentials nspawn handed in.
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LoadCredential = lib.attrNames storeFiles;
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Restart = "on-failure";
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RestartSec = "10s";
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SyslogIdentifier = unit;
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};
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};
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};
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};
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};
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}
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