feat: Add prometheus monitoring. Fixes #758

1 files changed, 16 insertions, 0 deletions

diff --git a/packages/api/routes/metrics.ts b/packages/api/routes/metrics.ts
new file mode 100644
index 00000000..90eff5b9
--- /dev/null
+++ b/packages/api/routes/metrics.ts
@@ -0,0 +1,16 @@
+// Import stats to register Prometheus metrics
+import "@karakeep/trpc/stats";
+
+import { prometheus } from "@hono/prometheus";
+import { Hono } from "hono";
+import { register } from "prom-client";
+
+import { prometheusAuthMiddleware } from "../middlewares/prometheusAuth";
+
+export const { printMetrics, registerMetrics } = prometheus({
+  registry: register,
+});
+
+const app = new Hono().get("/", prometheusAuthMiddleware, printMetrics);
+
+export default app;