Files
cairnobs/hack
jcoffey-dev 9435115ab7 Phase 3: dashboards and alerting
Saved, shareable multi-panel dashboards (table/line/bar/single-stat
panels via gridstack + uPlot, global + per-panel time range, JSON
export/import) and threshold/absence alert rules with an
ok/pending/firing evaluator and webhook/Slack/PagerDuty delivery.

- New /metadata component: Postgres control-plane store for dashboards,
  panels, notification targets, alert rules/state, and delivery log --
  see docs/phase-3-dashboard-design.md for why ClickHouse's MergeTree
  family isn't a fit for this access pattern (needs real row-level
  locking and read-your-writes consistency).
- api/internal/dashboards: dashboard/panel CRUD, pure -- panel query
  execution stays client-side, reusing the existing /query endpoint.
- New /alerting service: rule/target CRUD, a ticker-driven evaluator
  (claim-then-evaluate concurrency control, transactional-outbox
  delivery, query errors and threshold zero-rows never coerced into a
  false transition) and webhook/Slack/PagerDuty delivery with
  retry/backoff. See docs/phase-3-alerting-design.md for the full
  state-machine design and the four correctness properties it
  implements.
- web: /dashboards and /alerts UIs; cli: sentryctl dashboards/alerts
  list/get/apply, seeding a future Terraform provider's JSON contract.
- hack/alert-load-test: 500 rules against real ClickHouse data, real
  measured results in docs/phase-3-runbook.md.

Five real bugs found by actually running this against a live stack
(documented in the runbook, not just fixed silently): a latent Phase 2
bug where ClickHouse rejected the timestamp format used for
earliest=/latest= queries; a "now" literal token injected into query
text; a GridStack/uPlot layout-timing race; JS's Date.parse being too
lenient to use as a timestamp-detection heuristic; a rule's "enabled"
field silently defaulting to false when omitted; and the evaluator's
claim-batch-size and worker-pool-concurrency defaulting to the same
value, causing 500 concurrently-due rules to take 125s to cycle through
instead of the configured 60s.
2026-08-13 17:29:38 -07:00
..

hack

Local developer tooling that isn't part of any shipped component — scripts you run against your own machine/dev stack, not code that ends up in a container image (except dev-certs' output, which mounts into the ingest container).

Not one of the top-level directories in the original monorepo scaffold — added because dev-only mTLS cert generation didn't have a natural home in /deploy (real deployment manifests), /transport, or any other existing component. /hack is the conventional name for this in a lot of larger Go monorepos (Kubernetes among them).

  • dev-certs/ — generates a throwaway CA + server/client cert pair for local mTLS between the agent and ingest. See /docs/phase-0-runbook.md for when to run it.
  • windows-fixture/ — sends synthetic Windows Event Log-shaped records directly to ingest, bypassing the real Windows agent. Tests whether the pipeline handles Windows-shaped data; doesn't test the real EvtSubscribe/ETW integration, which needs actual Windows. See /docs/phase-1-runbook.md.