Zen: telemetry

cloud/function/src/log-processor.ts

@@ -0,0 +1,49 @@
+import { Resource } from "@opencode/cloud-resource"
+import type { TraceItem } from "@cloudflare/workers-types"
+
+export default {
+  async tail(events: TraceItem[]) {
+    for (const event of events) {
+      if (!event.event) continue
+      if (!("request" in event.event)) continue
+      if (event.event.request.method !== "POST") continue
+
+      const url = new URL(event.event.request.url)
+      if (url.pathname !== "/zen/v1/chat/completions") return
+
+      let metrics = {
+        event_type: "completions",
+        "cf.continent": event.event.request.cf?.continent,
+        "cf.country": event.event.request.cf?.country,
+        "cf.city": event.event.request.cf?.city,
+        "cf.region": event.event.request.cf?.region,
+        "cf.latitude": event.event.request.cf?.latitude,
+        "cf.longitude": event.event.request.cf?.longitude,
+        "cf.timezone": event.event.request.cf?.timezone,
+        duration: event.wallTime,
+        request_length: parseInt(event.event.request.headers["content-length"] ?? "0"),
+        status: event.event.response?.status ?? 0,
+        ip: event.event.request.headers["x-real-ip"],
+      }
+      for (const log of event.logs) {
+        for (const message of log.message) {
+          if (!message.startsWith("_metric:")) continue
+          metrics = { ...metrics, ...JSON.parse(message.slice(8)) }
+        }
+      }
+      console.log(JSON.stringify(metrics, null, 2))
+
+      const ret = await fetch("https://api.honeycomb.io/1/events/zen", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+          "X-Honeycomb-Event-Time": (event.eventTimestamp ?? Date.now()).toString(),
+          "X-Honeycomb-Team": Resource.HONEYCOMB_API_KEY.value,
+        },
+        body: JSON.stringify(metrics),
+      })
+      console.log(ret.status)
+      console.log(await ret.text())
+    }
+  },
+}

cloud/function/sst-env.d.ts

@@ -50,6 +50,10 @@ declare module "sst" {
       "type": "sst.sst.Secret"
       "value": string
     }
+    "HONEYCOMB_API_KEY": {
+      "type": "sst.sst.Secret"
+      "value": string
+    }
     "STRIPE_SECRET_KEY": {
       "type": "sst.sst.Secret"
       "value": string
@@ -76,6 +80,7 @@ declare module "sst" {
     "AuthApi": cloudflare.Service
     "AuthStorage": cloudflare.KVNamespace
     "Bucket": cloudflare.R2Bucket
+    "LogProcessor": cloudflare.Service
   }
 }