jcoffey-dev
9435115ab7
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.
web
SvelteKit frontend. Phase 0: one page, one query box, one table. No auth,
no styling polish, no routing beyond /.
What it does
Textarea for a raw SQL string → POST {VITE_API_BASE_URL}/query on /api
→ renders {columns, rows} as an HTML table, or shows {error} from a
rejected/failed query. That's the whole app — see src/routes/+page.svelte.
Why a static build, not a Node server
Scaffolded with @sveltejs/adapter-static: this page has no server-side
data loading (all data comes from a client-side fetch triggered by the
submit button), so there's nothing here that needs a running SvelteKit
server. A prerendered static site is simpler to build, deploy, and reason
about than running Node in production for a page that's this thin.
Because it's static, VITE_API_BASE_URL is baked in at build time, not
read at container start. Set it before npm run build (or pass
--build-arg VITE_API_BASE_URL=... to docker build) — changing it later
means rebuilding, not just restarting the container.
Building & running
npm install
cp .env.example .env # adjust VITE_API_BASE_URL if /api isn't on localhost:8080
npm run dev # local dev server with hot reload
npm run check # svelte-check, type errors
npm run build # static output to build/
npm run preview # serve the static build locally to sanity-check it
docker build -f Dockerfile -t sentry-web . # context is web/, not the repo root
docker run -p 3000:3000 sentry-web
Why nginx, not distroless
The repo convention prefers distroless/scratch base images. Serving a
static SPA still needs some HTTP server, though, and nginx:alpine is
the boring, standard choice for that job — writing a custom static-file
binary just to stay distroless would be more engineering than a Phase 0
placeholder page justifies. nginx.conf here is minimal: serve build/,
fall back to index.html for client-side routing (only one route exists
today, but this is what you want the moment a second one is added).