27cd4ea83c
- Add /api/metrics/prometheus endpoint using prom-client (unauthenticated for scraping) - Update middleware to allow unauthenticated access to prometheus endpoint - Add /api/metrics permission routing (platform:read for GET) - Install prom-client dependency - Add metrics.md with Grafana dashboard JSON, Prometheus config, alerting rules
75 lines
2.1 KiB
TypeScript
75 lines
2.1 KiB
TypeScript
import { NextResponse } from "next/server";
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import { Registry, Gauge } from "prom-client";
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import { query } from "@/lib/db";
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export const runtime = "nodejs";
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/**
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* Prometheus-compatible metrics endpoint.
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*
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* Usage in prometheus.yml:
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* - job_name: 'admin-metrics'
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* scrape_interval: 60s
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* static_configs:
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* - targets: ['admin:3000']
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* metrics_path: '/api/metrics/prometheus'
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*/
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export async function GET() {
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const register = new Registry();
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const gauge = new Gauge({
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name: "platform_entity_count",
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help: "Platform entity counts by time window",
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labelNames: ["entity", "window"] as const,
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registers: [register],
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});
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const entities = [
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{ name: "users", table: '"user"' },
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{ name: "workspaces", table: "workspace" },
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{ name: "projects", table: "project" },
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{ name: "repos", table: "repo" },
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{ name: "rooms", table: "room" },
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{ name: "skills", table: "project_skill" },
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];
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const results = await Promise.all(
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entities.map(async ({ name, table }) => {
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const res = await query<{
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total: string;
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new_27h: string;
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new_7d: string;
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new_30d: string;
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}>(
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`SELECT
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COUNT(*) AS total,
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COUNT(*) FILTER (WHERE created_at >= NOW() - INTERVAL '27 hours') AS new_27h,
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COUNT(*) FILTER (WHERE created_at >= NOW() - INTERVAL '7 days') AS new_7d,
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COUNT(*) FILTER (WHERE created_at >= NOW() - INTERVAL '30 days') AS new_30d
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FROM ${table}`
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);
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const row = res.rows[0];
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return {
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name,
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total: parseInt(row.total, 10),
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new_27h: parseInt(row.new_27h, 10),
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new_7d: parseInt(row.new_7d, 10),
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new_30d: parseInt(row.new_30d, 10),
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};
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})
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);
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for (const r of results) {
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gauge.set({ entity: r.name, window: "total" }, r.total);
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gauge.set({ entity: r.name, window: "27h" }, r.new_27h);
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gauge.set({ entity: r.name, window: "7d" }, r.new_7d);
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gauge.set({ entity: r.name, window: "30d" }, r.new_30d);
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}
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const metrics = await register.metrics();
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return new NextResponse(metrics, {
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headers: { "Content-Type": register.contentType },
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});
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}
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