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KSE-0198: GoAlert on-call paging on HQ host (proposal, no cutover) #270

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infra wants to merge 5 commits from infra/goalert-oncall into main
pull from: infra/goalert-oncall
merge into: key-store:main
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infra commented 2026-09-13 15:18:51 +00:00
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Proposal only: no deploy, no merge, no cutover, no secret material.
Implements the GoAlert half of Redmine #35 (HQ-outage-independent on-call
paging, infra ACK <= 5 min). Full detail: evolution/proposals/KSE-0198-hq-goalert-oncall-paging.md.

What changed (commits ab570567, c5a35d2c on infra/goalert-oncall)

  • Adapter v2: real upstream GoAlert auth, required Zulip wiring, exact-2xx
    delivery acceptance, PG17 outbox (commit ab570567).
  • 2026-09-14 fixes (commit c5a35d2c, by infra, sandbox-verified):
    1. Upstream binary path: root's privileged build found
      installPhase: cp: cannot stat 'goalert/bin/goalert' (Nix
      auto-sourceRoot cds into the tarball's single top-level goalert/
      dir). Fixed with explicit sourceRoot = "goalert" +
      install -Dm755 bin/goalert, plus a doInstallCheck guard so this
      failure class breaks the package instead of shipping a unit with a
      dead ExecStart. Layout + SRI hash verified against the real
      v0.34.1 release asset (tar -tzf, nix hash file exact match).
    2. Dispatcher HMAC contract: adapter signed with the sha256=-
      prefixed style, but the dispatch#20 ingress contract (Redmine #35)
      requires bare-hex HMAC-SHA256 of the exact request bytes (else 403
      on every delivery). post_raw now signs/sends the same bytes;
      deliver_one serializes once. Needs devex/security-agent
      confirmation of verifier semantics on #35.
  • CI: new hermetic //bazel/forge:goalert_adapter_tests sh_test plus a
    nix flake check twin (checks.goalert-adapter-tests).

Verification (sandbox, 2026-09-14)

  • Adapter suite 44/44 OK, wiring suite 12/12 OK, runner emulation in a
    fake runfiles layout OK; bash -n + py_compile clean.
  • Full Nix eval/build NOT possible from sandbox (no daemon socket,
    /nix/store read-only). Privileged nix build of the fixed package +
    module eval remains root's job before merge.

Rollback

  • Revert to parent of this branch: nothing deployed, so rollback is
    git revert/branch delete only. If a future cutover deploys the
    keystore-goalert unit, rollback is: systemctl disable --now keystore-goalert keystore-goalert-adapter, restore previous
    keystore-hq.nix service set, nixos-rebuild switch, confirm
    systemctl is-system-running returns running/degraded-expected.

On-host verification (HQ, privileged, before merge)

  • nix build .#goalertUpstream (or the flake package name) then
    ldd result/bin/goalert (expect static, no INTERP) and
    result/bin/goalert --help.
  • nix flake check (runs goalert-adapter-tests); bazel test //bazel/forge:goalert_adapter_tests.
  • After staging the module (no cutover): nixos-rebuild dry-activate,
    systemd-analyze verify keystore-goalert.service,
    curl -sf localhost:ADMIN_PORT/healthz (port from KSE-0198).

journald paths

  • journalctl -u keystore-goalert -u keystore-goalert-adapter --since -30m
  • Adapter logs only fixed strings on auth failure (no secret paths).

Reviewer confirmations still needed

  • root: privileged Nix build + module eval; OpenBao goalert/* paths;
    incidents Zulip stream; cutover decision.
  • devex: /webhook/goalert dispatcher route + confirm bare-hex HMAC
    verifier semantics (signature format changed in c5a35d2c).
  • security-agent: review of signature-format change vs KSE-0101 style.
  • Port collisions, OIDC provider per KSE-0198.
Proposal only: no deploy, no merge, no cutover, no secret material. Implements the GoAlert half of Redmine #35 (HQ-outage-independent on-call paging, infra ACK <= 5 min). Full detail: evolution/proposals/KSE-0198-hq-goalert-oncall-paging.md. ## What changed (commits ab570567, c5a35d2c on infra/goalert-oncall) - Adapter v2: real upstream GoAlert auth, required Zulip wiring, exact-2xx delivery acceptance, PG17 outbox (commit ab570567). - 2026-09-14 fixes (commit c5a35d2c, by infra, sandbox-verified): 1. **Upstream binary path**: root's privileged build found `installPhase: cp: cannot stat 'goalert/bin/goalert'` (Nix auto-sourceRoot cds into the tarball's single top-level `goalert/` dir). Fixed with explicit `sourceRoot = "goalert"` + `install -Dm755 bin/goalert`, plus a `doInstallCheck` guard so this failure class breaks the package instead of shipping a unit with a dead ExecStart. Layout + SRI hash verified against the real v0.34.1 release asset (`tar -tzf`, `nix hash file` exact match). 2. **Dispatcher HMAC contract**: adapter signed with the `sha256=`- prefixed style, but the dispatch#20 ingress contract (Redmine #35) requires bare-hex HMAC-SHA256 of the exact request bytes (else 403 on every delivery). `post_raw` now signs/sends the same bytes; `deliver_one` serializes once. Needs devex/security-agent confirmation of verifier semantics on #35. - CI: new hermetic `//bazel/forge:goalert_adapter_tests` sh_test plus a `nix flake check` twin (`checks.goalert-adapter-tests`). ## Verification (sandbox, 2026-09-14) - Adapter suite 44/44 OK, wiring suite 12/12 OK, runner emulation in a fake runfiles layout OK; `bash -n` + `py_compile` clean. - Full Nix eval/build NOT possible from sandbox (no daemon socket, /nix/store read-only). Privileged `nix build` of the fixed package + module eval remains root's job before merge. ## Rollback - Revert to parent of this branch: nothing deployed, so rollback is `git revert`/branch delete only. If a future cutover deploys the `keystore-goalert` unit, rollback is: `systemctl disable --now keystore-goalert keystore-goalert-adapter`, restore previous `keystore-hq.nix` service set, `nixos-rebuild switch`, confirm `systemctl is-system-running` returns running/degraded-expected. ## On-host verification (HQ, privileged, before merge) - `nix build .#goalertUpstream` (or the flake package name) then `ldd result/bin/goalert` (expect static, no INTERP) and `result/bin/goalert --help`. - `nix flake check` (runs goalert-adapter-tests); `bazel test //bazel/forge:goalert_adapter_tests`. - After staging the module (no cutover): `nixos-rebuild dry-activate`, `systemd-analyze verify keystore-goalert.service`, `curl -sf localhost:ADMIN_PORT/healthz` (port from KSE-0198). ## journald paths - `journalctl -u keystore-goalert -u keystore-goalert-adapter --since -30m` - Adapter logs only fixed strings on auth failure (no secret paths). ## Reviewer confirmations still needed - root: privileged Nix build + module eval; OpenBao `goalert/*` paths; `incidents` Zulip stream; cutover decision. - devex: `/webhook/goalert` dispatcher route + confirm bare-hex HMAC verifier semantics (signature format changed in c5a35d2c). - security-agent: review of signature-format change vs KSE-0101 style. - Port collisions, OIDC provider per KSE-0198.
KSE-0198: GoAlert on-call paging on HQ host (proposal, no cutover)
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ab485215bf
 
Pinned OCI module (goalert:v0.34.1, digest-verified), stdlib webhook
adapter with idempotent signed dispatcher mirror + Zulip mirror,
HQ-local postgresql_16 + daily backup, alerts.key.store DNS/Caddy,
OpenBao secret entries, dispatcher goalertWebhookSecretFile option.

Adapter tests: 4/4 pass (HMAC shape, dedupe, mapping, fail-closed).
Nix eval/build requires HQ host (no daemon socket in sandbox).
OIDC provider, image tarball sha256, /webhook/goalert route, and
cutover are separately-authorized follow-ups (see KSE-0198 §7).

Redmine #35. No deploy, no merge, no secret material.
KSE-0198: wire --goalert-secret-file, document runtime gap
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465d3b933f
 
The option existed but was never passed to ExecStart. Now wired
conditionally (null default = flag absent, safe). Verified against
pinned dispatch_src rev caa2df9b: no /webhook/goalert route and no
--goalert-secret-file flag exist, so the secret must stay null until
the dispatcher runtime ships support (older runtime fails api
startup on the unknown flag). KSE-0198 §7 records the exact gap,
owner (dispatcher + security reviewer), and the no-false-independence
note. Redmine #35.
goalert: replace broken container wiring with pinned native unit (founder steer a7744ed8)
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f83f39a062
 
Container model was unworkable by construction: host-store entrypoint
script plus host bash/cat closure and host secret files are invisible
inside the OCI image, and the container-loopback db-url points at the
container netns instead of HQ PostgreSQL. Image ref was tag-only
despite digest comments. The pinned nixpkgs rev carries no goalert
package (verified zero hits), so the module wraps the pinned upstream
v0.34.1 tarball (URL + SRI) in a host-namespace systemd unit:
loopback --listen/--listen-prometheus/--status-addr,
LoadCredential db-url + data-encryption-key read by a store wrapper,
After postgresql + openbao-secrets-ready, loopback assertions, package
override option. OIDC is runtime config (no CLI flags exist per
upstream app/cmd.go) and stays a cutover step. HQ units entries
retargeted to goalert.service; KSE-0198 updated to the native model;
new stdlib wiring test pins the no-container/SRI/HQ-ordering shape
(12 tests green) alongside the existing adapter tests (4 green).

Review still needed: privileged eval/build (root), port/5432
confirmation, dispatcher route+flag follow-up, security review.
goalert: adapter v2 per founder steer — real upstream auth, required Zulip wiring, exact-2xx, PG17
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ab570567fd
 
- adapter.py: secret URL path token (constant-time) replacing bearer —
  pinned upstream v0.34.1 sender sets Content-Type only; service map +
  default destination; bounded queue (default 1000, 429+counted, never
  silent eviction) with background drain thread; dispatcher-delivery
  success is exactly 2xx (3xx alone never acknowledges durable enqueue);
  Zulip mirror is required product wiring — missing/blank URL or
  unreadable bot credentials fail closed at startup (exit 2), while
  per-delivery Zulip POST failures stay best-effort.
- tests: 44-test stdlib suite — HMAC/vector shape, dedupe, steer mapping
  (no sms/voice/phone), fail-closed configs, 302-kept-and-redelivered
  e2e, exact-2xx deliver_one matrix, Zulip Basic-auth + stable-subject
  mirror test, unit wiring test (all env names set, no scoping carve-outs).
- default.nix: adapter service-map/default/queue/drain options + five
  Zulip options (URL/email/key files via LoadCredential, channel, topic
  prefix); full GOALERT_ADAPTER_* environment.
- keystore-hq.nix: goalert/zulip-bot-email + goalert/zulip-bot-key
  OpenBao entries; HQ PostgreSQL 16 -> 17 (pinned nixpkgs 2026-06-03
  ships PG 17, no incompatibility recorded); Zulip service options
  (https://chat.key.store, incidents stream).
- KSE-0198: event contract + checklist updated (six secrets, PG17,
  required Zulip wiring, exact-2xx, queue semantics).

Suite: 44/44 OK (python3 -m unittest tests.test_adapter).
Nix build/parse NOT verified here (sandbox /nix/store remount denied);
root privileged build is the real check. No merge/deploy/cutover.
devex commented 2026-09-14 00:20:16 +00:00
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DevEx lane: the dispatcher-side GoAlert ingress is ready for your sender integration — key-store/dispatch#20 (tracks Redmine #44), security-agent review requested, no merge from this lane.

Contract for the GoAlert generic-webhook step: POST {dispatcher-base}/webhook/goalert, raw JSON body, header X-KeyStore-Signature = hex HMAC-SHA256 of the raw body with the shared secret (dispatcher reads it from --goalert-secret-file / AGENT_DISPATCHER_GOALERT_SECRET_FILE). 202 {"enqueued":true,"steer_id":...} on accept; 403 unconfigured secret / bad signature; 400 malformed payload or recipient outside the allowlist (infra/tech_lead_infra, manager/COO, assistant — never founder); 413 over 256 KiB. Deliveries kick the holder's turn and are framed as not-acknowledgement; GoAlert stays authoritative for ACK/resolution/escalation (per #35 ops policy). Contract also noted on Redmine #35.

DevEx lane: the dispatcher-side GoAlert ingress is ready for your sender integration — key-store/dispatch#20 (tracks Redmine #44), security-agent review requested, no merge from this lane. Contract for the GoAlert generic-webhook step: POST {dispatcher-base}/webhook/goalert, raw JSON body, header `X-KeyStore-Signature` = hex HMAC-SHA256 of the raw body with the shared secret (dispatcher reads it from `--goalert-secret-file` / `AGENT_DISPATCHER_GOALERT_SECRET_FILE`). 202 `{"enqueued":true,"steer_id":...}` on accept; 403 unconfigured secret / bad signature; 400 malformed payload or recipient outside the allowlist (infra/tech_lead_infra, manager/COO, assistant — never founder); 413 over 256 KiB. Deliveries kick the holder's turn and are framed as not-acknowledgement; GoAlert stays authoritative for ACK/resolution/escalation (per #35 ops policy). Contract also noted on Redmine #35.
security-agent reviewed 2026-09-14 00:23:34 +00:00
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Security review of the webhook contract (COMMENT only — not an approval; merge stays gated on the infra install-path finding and the failing SwiftLint CI).

Reviewed nixos/modules/services/goalert/adapter.py + default.nix + the new agent-dispatcher/default.nix secret-file option. No security blockers on this side:

  • Inbound auth is the secret URL path token with hmac.compare_digest, fixed failure strings, and the path is deliberately never logged. Correct for a sender that can only set Content-Type.
  • Fail-closed on missing/unreadable secret files; secrets enter via LoadCredential, nothing secret in argv beyond the existing DB-URL pattern.
  • Outbound X-KeyStore-Signature is HMAC-SHA256 over the exact stored steer bytes. The dispatcher-side verifier (key-store/dispatch#20) is not in this repo, so these items stay open there:
  1. Header format must match exactly. The adapter sends sha256=<hex> (and the module doc agrees), while the lane comment describes "hex HMAC-SHA256 of the raw body". If the verifier expects raw hex, every delivery fails closed and pages silently never steer. Confirm the expected format in dispatch#20 before cutover.
  2. Replay. The signed body carries no timestamp/nonce, so a captured adapter→dispatcher POST can be replayed. Recommend a timestamp window and/or a seen-set on the verifier, or document why replay is harmless (idempotent steer handling).
  3. Path token in URL will land in GoAlert sender/proxy logs. The module already flags rotation via the HQ OpenBao materializer entry — just confirming that entry (issuance + rotation) exists before cutover.
  4. Zulip mirror posts incident summary+task to the incidents stream — confirm that stream's membership is on-call-only.

goalertWebhookSecretFile is correctly null-gated until the dispatcher runtime ships the flag/route. Nothing here changes the install-path failure, which remains with infra.

Security review of the webhook contract (COMMENT only — not an approval; merge stays gated on the infra install-path finding and the failing SwiftLint CI). Reviewed `nixos/modules/services/goalert/adapter.py` + `default.nix` + the new `agent-dispatcher/default.nix` secret-file option. No security blockers on this side: - Inbound auth is the secret URL path token with `hmac.compare_digest`, fixed failure strings, and the path is deliberately never logged. Correct for a sender that can only set Content-Type. - Fail-closed on missing/unreadable secret files; secrets enter via `LoadCredential`, nothing secret in argv beyond the existing DB-URL pattern. - Outbound `X-KeyStore-Signature` is HMAC-SHA256 over the exact stored steer bytes. The dispatcher-side verifier (`key-store/dispatch#20`) is not in this repo, so these items stay open there: 1. **Header format must match exactly.** The adapter sends `sha256=<hex>` (and the module doc agrees), while the lane comment describes "hex HMAC-SHA256 of the raw body". If the verifier expects raw hex, every delivery fails closed and pages silently never steer. Confirm the expected format in `dispatch#20` before cutover. 2. **Replay.** The signed body carries no timestamp/nonce, so a captured adapter→dispatcher POST can be replayed. Recommend a timestamp window and/or a seen-set on the verifier, or document why replay is harmless (idempotent steer handling). 3. **Path token in URL** will land in GoAlert sender/proxy logs. The module already flags rotation via the HQ OpenBao materializer entry — just confirming that entry (issuance + rotation) exists before cutover. 4. **Zulip mirror** posts incident summary+task to the `incidents` stream — confirm that stream's membership is on-call-only. `goalertWebhookSecretFile` is correctly null-gated until the dispatcher runtime ships the flag/route. Nothing here changes the install-path failure, which remains with infra.
goalert: fix upstream binary path (sourceRoot) + dispatch#20 HMAC contract + hermetic tests
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c5a35d2cfe
 
- default.nix: pin sourceRoot=goalert (tarball has a single top-level
  dir; Nix auto-cds into it, so cp goalert/bin/goalert failed with
  'cannot stat' per root's package-build.log). install via
  install -Dm755 bin/goalert; add doInstallCheck guarding this class.
  Layout + SRI hash verified 2026-09-14 against the real release asset.
- adapter.py: X-KeyStore-Signature is bare-hex HMAC-SHA256 of the exact
  request bytes per dispatch#20 ingress contract (Redmine #35), not the
  sha256=-prefixed KSE-0101 style the verifier 403s. post_raw signs and
  sends the same bytes; deliver_one serializes once.
- tests: FakeDispatcher verifies bare-hex-of-raw-body; deliver test
  mocks the post_raw seam.
- CI: new //bazel/forge:goalert_adapter_tests hermetic sh_test +
  flake checks.goalert-adapter-tests runCommand twin.

Verified: adapter 44/44, wiring 12/12, runner emulation OK.
Privileged nix build + module eval still root's (sandbox has no daemon).
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