f70bbda7d7
The gateway nginx serves stub_status on a loopback server of its own, 127.0.0.1:8085 (services.hyperhive.gateway.statusPort). The hive-tier collector reads it with the contrib nginx receiver, which the pinned otelcol-contrib 0.151.0 ships, so no exporter daemon is added. The receiver dials http:// only (a unix: or http+unix: endpoint fails with "unsupported protocol scheme"), so the listener is loopback TCP with allow 127.0.0.1 / deny all rather than a unix socket. The new gateway dashboard plots nginx.requests, nginx.connections_current by state, and nginx.connections_accepted against handled, per hive. Part of #5342.
373 lines
18 KiB
Nix
373 lines
18 KiB
Nix
# `checks.module-eval-hive-otel` — see ./lib.nix for the shared
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# rationale (why this suite exists, naming convention, "evaluates
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# not executes").
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{
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pkgs,
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lib,
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self,
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nixosSystem,
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shared,
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}:
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let
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inherit
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(import ./lib.nix {
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inherit
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pkgs
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lib
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self
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nixosSystem
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;
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})
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hive
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runGroup
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otelSettings
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;
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# This hive's own collector, which is a HOST service — unlike the swarm
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# tier's, which lives in a container and is read through `otelSettings`.
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# The IdP is here too, with a hand-named secret file: the collector's wait
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# for that file exists beside authelia's container.
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hiveOtel = hive {
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otel.enable = true;
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otel.clientSecretFile = "/var/lib/hive-otel-oidc/client.secret";
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deploy.authelia.enable = true;
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};
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# A hive holding its own store leaf, placed by hand, and naming no secret
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# file: the collector's secret comes from the store under that leaf.
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hiveOtelLeaf = hive {
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otel.enable = true;
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deploy.bao.clientCertFile = "/etc/pki/hive.pem";
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deploy.bao.clientKeyFile = "/etc/pki/hive-key.pem";
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};
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# The IdP, the store and the collector on one host: the publisher that
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# writes the secret and the unit that reads it, in one config.
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hiveOtelAllLocal = hive {
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otel.enable = true;
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deploy.bao.enable = true;
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deploy.authelia.enable = true;
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};
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hiveOtelFetch = machine: machine.systemd.services.swarm-bao-hive-otel-oidc;
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hiveOtelPipelines = hiveOtel.services.opentelemetry-collector.settings.service.pipelines;
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hiveOtelSettings = hiveOtel.services.opentelemetry-collector.settings;
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# The hive tier's rendered scrape list. Same reasoning as `scrapeJob` for
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# the swarm tier — the option is one string, what prometheus is handed is a
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# job — but this collector is a host service, so the path to it differs.
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hiveScrapeJob =
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job:
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lib.findFirst (
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c: c.job_name == job
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) null hiveOtelSettings.receivers.prometheus.config.scrape_configs;
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# The store with and without a collector on the same host. `scrapeTargets`
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# is only ever read by a local collector, so the metrics endpoint is a
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# function of the pairing rather than of the store.
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inherit (shared) baoWithCollector;
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# The store standing beside a HIVE collector: the topology the port case
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# below needs, two collectors in one netns with nothing but their
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# self-telemetry ports keeping them apart.
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inherit (shared) baoWithHiveOtel;
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# The collector INSIDE the store's container — neither the host's nor the
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# swarm tier's.
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baoForwarderSettings =
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machine: machine.containers.swarm-bao.config.services.opentelemetry-collector.settings;
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cases = [
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{
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# The tier in the middle. Its OTLP receiver takes both signals on one
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# port, so without this pipeline an agent's push is answered 404 on
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# `/v1/logs` — and a forwarder retrying into a 404 is indistinguish-
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# able from one with nothing to send. `journald` joined the receiver
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# list for this collector's own host journal (hive-c0re's crash-watch
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# log line, see ./otel.nix) — both have to be present, in either
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# order, so this stays a set check rather than a list-equality one.
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# Compared against the metrics pipeline's exporters rather than a
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# name, so the two signals cannot drift to different destinations.
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name = "the hive collector forwards logs upstream, not only metrics";
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ok =
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(hiveOtelPipelines ? logs)
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&& hiveOtelPipelines.metrics.exporters != [ ]
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&&
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lib.sort builtins.lessThan hiveOtelPipelines.logs.receivers == [
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"journald"
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"otlp"
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]
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&& hiveOtelPipelines.logs.exporters == hiveOtelPipelines.metrics.exporters;
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}
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{
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# `deltatocumulative` is metrics-only: naming it in a logs pipeline
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# kills the collector at startup rather than doing nothing. The second
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# clause is the control — the metrics pipeline still names it, so a
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# pass means the two processor lists differ rather than that the
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# processor left the module.
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name = "the hive collector keeps the metrics-only processor out of its logs pipeline";
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ok =
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!(builtins.elem "deltatocumulative" hiveOtelPipelines.logs.processors)
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&& builtins.elem "deltatocumulative" hiveOtelPipelines.metrics.processors;
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}
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{
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# `otelcol validate` refuses a `service.extensions` entry with no
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# definition, and that runs when the unit is built, not in this suite.
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# `hiveOtel` authenticates upstream, so both extensions are listed;
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# the length clause keeps the check from passing on an empty list.
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name = "the hive collector defines every extension its service lists";
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ok =
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lib.length hiveOtelSettings.service.extensions == 2
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&& lib.all (e: hiveOtelSettings.extensions ? ${e}) hiveOtelSettings.service.extensions;
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}
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{
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# The counters that say telemetry is being LOST — refused, failed,
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# queue depth — are served on loopback and reach no store unless
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# something reads them. Read off the rendered job rather than the
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# option: only the job is what prometheus actually requests.
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name = "the hive collector scrapes its own telemetry endpoint";
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ok =
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let
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j = hiveScrapeJob "collector";
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in
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j != null && j.static_configs == [ { targets = [ "127.0.0.1:8888" ]; } ];
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}
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{
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# A `prometheus` receiver no pipeline names collects nothing while
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# rendering and starting perfectly, so the scrape above is inert
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# without this. The path is newly reachable: until the hive tier had a
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# target of its own, this receiver was never emitted on any hive.
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name = "the hive metrics pipeline names the prometheus receiver the self-scrape needs";
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ok = builtins.elem "prometheus" hiveOtelPipelines.metrics.receivers;
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}
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{
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# The receiver, the pipeline entry and the nginx server it reads have to
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# agree on one address, and none of them may exist without a gateway on
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# the host. `hiveOtelLeaf` is the control: it runs no gateway, and the
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# clause asserting that keeps the control from going vacuous.
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name = "the hive collector reads the gateway's stub_status, and only where a gateway runs";
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ok =
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let
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nginxConf = hiveOtel.services.nginx.appendHttpConfig;
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leafSettings = hiveOtelLeaf.services.opentelemetry-collector.settings;
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in
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hiveOtel.services.hyperhive.gateway.enable
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&& hiveOtelSettings.receivers.nginx.endpoint == "http://127.0.0.1:8085/stub_status"
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&& builtins.elem "nginx" hiveOtelPipelines.metrics.receivers
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&& lib.hasInfix "listen 127.0.0.1:8085;" nginxConf
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&& lib.hasInfix "location = /stub_status {" nginxConf
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&& !hiveOtelLeaf.services.hyperhive.gateway.enable
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&& !(leafSettings.receivers ? nginx)
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&& !(builtins.elem "nginx" leafSettings.service.pipelines.metrics.receivers);
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}
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{
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# `metrics.address` is the spelling that looks right and is rejected by
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# this collector version. The first clause is the control: without it a
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# missing telemetry block would pass the port check vacuously.
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name = "the hive collector binds its telemetry port through readers, not address";
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ok =
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let
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m = hiveOtelSettings.service.telemetry.metrics;
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in
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!(m ? address) && (lib.head m.readers).pull.exporter.prometheus.port == 8888;
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}
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{
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# A bind that loses the race with the outgoing process is the whole
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# failure: nixpkgs ships `Restart = "always"` with no `RestartSec`, so
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# without this the unit spends its five default attempts inside two
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# seconds and lands in `start-limit-hit`, where it stops retrying. The
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# third clause is the one that has to hold — `StartLimit*` are `[Unit]`
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# settings that systemd ignores under `[Service]`, so a bound written
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# into `serviceConfig` renders, deploys and does nothing. Asserted
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# where nixpkgs puts it rather than where it was written, same as
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# ./bao-grants.nix.
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name = "the hive collector backs off a failed bind from [Unit], not [Service]";
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ok =
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let
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u = hiveOtel.systemd.services.opentelemetry-collector;
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in
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u.serviceConfig.RestartSec or 0 > 0
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&& toString u.unitConfig.StartLimitBurst == "12"
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&& !(u.serviceConfig ? StartLimitBurst)
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# The window has to outlast every attempt, or the burst is unreachable.
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&& u.startLimitIntervalSec or 0 > u.serviceConfig.RestartSec * u.startLimitBurst;
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}
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{
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# Collectors share a network namespace whenever they are co-located,
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# and this port appears in no config the port-collision assertion can
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# read — so equal defaults mean the second to start dies at `bind()`.
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# Pinned as a case rather than an assertion: enforcing it belongs with
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# the other port checks, not here.
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#
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# THREE tiers, because the store's container grew a collector of its
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# own and this case could not see it: an UNDECLARED port is not an
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# absent one, it is the binary's 8888, which is the hive tier's. That
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# is why `portOf` falls back to 8888 rather than throwing — a tier that
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# declares nothing has to fail this case loudly, not evaluate away.
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name = "no two collector tiers claim the same self-telemetry port";
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ok =
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let
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portOf =
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s:
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(lib.head (s.service.telemetry.metrics.readers or [ { } ])).pull.exporter.prometheus.port or 8888;
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hivePort = portOf hiveOtelSettings;
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swarmPort = portOf (otelSettings baoWithCollector);
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baoPort = portOf (baoForwarderSettings baoWithHiveOtel);
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in
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hivePort != swarmPort && hivePort != baoPort && swarmPort != baoPort;
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}
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{
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# The collector authenticates as the hive, so it reads its secret as
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# the hive: the leaf `deploy.bao.clientCertFile` names, whose policy
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# grants `swarm/hives/<hive>/*`. The last two clauses tie the unit's
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# output to what the collector loads.
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name = "the hive collector's secret is fetched from the store under the hive's own leaf";
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ok =
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let
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u = hiveOtelFetch hiveOtelLeaf;
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b = hiveOtelLeaf.services.hyperhive.deploy.bao;
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file = hiveOtelLeaf.services.hyperhive.otel.clientSecretFile;
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s = builtins.unsafeDiscardStringContext u.script;
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in
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hiveOtelLeaf.systemd.services ? swarm-bao-hive-otel-oidc
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&& u.environment.BAO_CLIENT_CERT == b.clientCertFile
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&& u.environment.BAO_CLIENT_KEY == b.clientKeyFile
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&& lib.hasInfix "bao login -method=cert" s
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&& lib.hasInfix "bao kv get -field=value secret/swarm/hives/h1/oidc/client" s
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&& lib.hasInfix "atomic_write_secret 0400 \"\" ${file} " s
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&& builtins.elem "swarm-client.secret:${file}" hiveOtelLeaf.systemd.services.opentelemetry-collector.serviceConfig.LoadCredential
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&& builtins.elem "opentelemetry-collector.service" u.wantedBy
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&& builtins.elem "opentelemetry-collector.service" u.before;
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}
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{
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# `LoadCredential` copies the file at the collector's start, so a value
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# landed later reaches it only through a restart. Retries every 30s
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# (./lib/store-retry.nix) while the store is down or the secret
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# unpublished.
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name = "the hive collector's fetch retries and restarts the collector when the file is newer";
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ok =
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let
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u = hiveOtelFetch hiveOtelLeaf;
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s = builtins.unsafeDiscardStringContext u.script;
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in
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u.serviceConfig.Restart == "on-failure"
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&& u.serviceConfig.RestartSec == 30
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&& toString u.unitConfig.StartLimitBurst == "2880"
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&& lib.hasInfix "refresh_unit opentelemetry-collector.service /var/lib/hive-otel-oidc/hive-h1.secret" s
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&& lib.hasInfix "ActiveEnterTimestamp" s
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&& lib.hasInfix ''if [ "$written_us" -le "$started_us" ]; then'' s;
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}
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{
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# On a first boot the file does not exist until the fetch succeeds, so
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# the collector fails `LoadCredential` into its start limit, i.e. the
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# `failed` state. Only `reset-failed` clears that limit, so the fetch
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# has to reset before it starts; `try-restart` acts on no failed unit.
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# A never-active collector has an empty `ActiveEnterTimestamp`, read as
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# 0, so the file always counts as newer. The collector only `wants` the
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# fetch, so an unreachable store does not hold it back.
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name = "the hive collector's fetch revives a collector that hit its start limit without the file";
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ok =
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let
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s = builtins.unsafeDiscardStringContext (hiveOtelFetch hiveOtelLeaf).script;
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c = hiveOtelLeaf.systemd.services.opentelemetry-collector;
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failedArm = lib.last (lib.splitString ''is-failed --quiet "$unit"; then'' s);
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in
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lib.hasInfix ''is-failed --quiet "$unit"; then'' s
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&& lib.hasInfix ''reset-failed "$unit"'' failedArm
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&& lib.hasInfix ''start --no-block "$unit"'' (
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lib.last (lib.splitString ''reset-failed "$unit"'' failedArm)
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)
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&& lib.hasInfix "started_us=0" s
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&& !(builtins.elem "swarm-bao-hive-otel-oidc.service" (c.requires or [ ]));
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}
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{
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# The store is the one route, on the IdP's own host too: no default into
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# authelia's tree and no unit waiting for a file to appear there.
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name = "the hive collector reads no secret out of authelia's tree and waits on no copied file";
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ok =
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let
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file = hiveOtelAllLocal.services.hyperhive.otel.clientSecretFile;
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c = hiveOtelAllLocal.systemd.services.opentelemetry-collector;
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in
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!(hiveOtelAllLocal.systemd.services ? hive-otel-client-secret)
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&& !(hiveOtelLeaf.systemd.services ? hive-otel-client-secret)
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&& !(lib.hasInfix "authelia" file)
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&& hiveOtelAllLocal.systemd.services ? swarm-bao-hive-otel-oidc
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&& !(builtins.elem "hive-otel-client-secret.service" (c.requires or [ ]));
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}
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{
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# The writer and the reader spell the path independently; this is the
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# one place that sees both rendered.
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name = "the hive collector reads the path the secret publisher writes";
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ok =
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let
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fetch = builtins.unsafeDiscardStringContext (hiveOtelFetch hiveOtelAllLocal).script;
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publish = builtins.unsafeDiscardStringContext hiveOtelAllLocal.systemd.services.swarm-secret-publish.script;
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path = "secret/swarm/hives/h1/oidc/client";
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in
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lib.hasInfix "bao kv get -field=value ${path}" fetch && lib.hasInfix "bao kv put ${path} " publish;
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}
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{
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# The store's units exist only on its host; `Requires=` on an absent one
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# fails the fetch's start.
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name = "the hive collector's fetch waits for the store's container and PKI unit only where the store runs here";
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ok =
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let
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storeUnits = m: [
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"swarm-bao-pki.service"
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"container@${m.services.hyperhive.swarm.bao.machine}.service"
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];
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here = hiveOtelFetch hiveOtelAllLocal;
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elsewhere = hiveOtelFetch hiveOtelLeaf;
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in
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lib.all (n: lib.elem n here.after) (storeUnits hiveOtelAllLocal)
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&& lib.elem "swarm-bao-pki.service" here.requires
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&& lib.elem "container@${hiveOtelAllLocal.services.hyperhive.swarm.bao.machine}.service" here.wants
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&& !(lib.any (n: lib.elem n (elsewhere.after ++ elsewhere.wants ++ elsewhere.requires)) (
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storeUnits hiveOtelLeaf
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));
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}
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{
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# A secret delivered some other way is the operator's: no unit fetches
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# into a file the collector does not load, or restarts it on one. Nothing
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# restarts the collector when that file lands, so it waits for the file
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# instead of failing `LoadCredential` into its start limit.
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name = "a hand-named collector secret renders no store fetch, and the collector waits for the file";
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ok =
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let
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waitsFor =
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machine:
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let
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c = machine.systemd.services.opentelemetry-collector;
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w = machine.systemd.services.hive-otel-client-secret;
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in
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builtins.elem "hive-otel-client-secret.service" c.requires
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&& builtins.elem "hive-otel-client-secret.service" c.after
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&& lib.hasInfix "/var/lib/hive-otel-oidc/client.secret" w.script;
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in
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!(hiveOtel.systemd.services ? swarm-bao-hive-otel-oidc)
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&& !(baoWithHiveOtel.systemd.services ? swarm-bao-hive-otel-oidc)
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&& builtins.elem "swarm-client.secret:/var/lib/hive-otel-oidc/client.secret" baoWithHiveOtel.systemd.services.opentelemetry-collector.serviceConfig.LoadCredential
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&& waitsFor hiveOtel
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&& waitsFor baoWithHiveOtel;
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}
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{
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# ../host-modules/glue-hive-otel-authelia.nix orders the wait after
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# authelia's container. `hiveOtel` has the IdP; `baoWithHiveOtel` waits
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# on the same kind of file without it, and must not name a container
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# that is not there — `Requires=` on an absent unit fails the job.
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name = "the hive collector's secret wait is ordered after authelia's container only where authelia runs here";
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ok =
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let
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container = "container@${hiveOtel.services.hyperhive.swarm.authelia.machine}.service";
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wait = machine: machine.systemd.services.hive-otel-client-secret;
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in
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|
builtins.elem container (wait hiveOtel).after
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&& builtins.elem container (wait hiveOtel).requires
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&& !(builtins.elem container (wait baoWithHiveOtel).after)
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|
&& !(builtins.elem container (wait baoWithHiveOtel).requires);
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}
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];
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in
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runGroup "hive-otel" cases
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