add pod cleaner and tests

Author: nicktrn

apps/supervisor/package.json

@@ -6,15 +6,18 @@
   "type": "module",
   "scripts": {
     "build": "tsc",
-    "dev": "tsx --experimental-sqlite --require dotenv/config --watch src/index.ts || (echo '!! Remember to run: nvm use'; exit 1)",
-    "start": "node --experimental-sqlite dist/index.js",
+    "dev": "tsx --require dotenv/config --watch src/index.ts || (echo '!! Remember to run: nvm use'; exit 1)",
+    "start": "node dist/index.js",
+    "test": "vitest run",
+    "test:watch": "vitest",
     "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@kubernetes/client-node": "^1.0.0",
     "@trigger.dev/core": "workspace:*",
     "dockerode": "^4.0.3",
     "nanoid": "^5.0.9",
+    "prom-client": "^15.1.0",
     "socket.io": "4.7.4",
     "std-env": "^3.8.0",
     "tinyexec": "^0.3.1",

apps/supervisor/src/clients/kubernetes.ts

@@ -1,15 +1,28 @@
 import * as k8s from "@kubernetes/client-node";
+import { Informer } from "@kubernetes/client-node";
+import { ListPromise } from "@kubernetes/client-node";
+import { KubernetesObject } from "@kubernetes/client-node";
 import { assertExhaustive } from "@trigger.dev/core/utils";
 
 export const RUNTIME_ENV = process.env.KUBERNETES_PORT ? "kubernetes" : "local";
 
 export function createK8sApi() {
   const kubeConfig = getKubeConfig();
 
+  function makeInformer<T extends KubernetesObject>(
+    path: string,
+    listPromiseFn: ListPromise<T>,
+    labelSelector?: string,
+    fieldSelector?: string
+  ): Informer<T> {
+    return k8s.makeInformer(kubeConfig, path, listPromiseFn, labelSelector, fieldSelector);
+  }
+
   const api = {
     core: kubeConfig.makeApiClient(k8s.CoreV1Api),
     batch: kubeConfig.makeApiClient(k8s.BatchV1Api),
     apps: kubeConfig.makeApiClient(k8s.AppsV1Api),
+    makeInformer,
   };
 
   return api;

apps/supervisor/src/env.ts

@@ -51,6 +51,14 @@ const Env = z.object({
   KUBERNETES_NAMESPACE: z.string().default("default"),
   EPHEMERAL_STORAGE_SIZE_LIMIT: z.string().default("10Gi"),
   EPHEMERAL_STORAGE_SIZE_REQUEST: z.string().default("2Gi"),
+
+  // Metrics
+  METRICS_COLLECT_DEFAULTS: BoolEnv.default(true),
+
+  // Pod cleaner
+  POD_CLEANER_ENABLED: BoolEnv.default(true),
+  POD_CLEANER_INTERVAL_MS: z.coerce.number().int().default(10000),
+  POD_CLEANER_BATCH_SIZE: z.coerce.number().int().default(500),
 });
 
 export const env = Env.parse(stdEnv);

apps/supervisor/src/index.ts

@@ -18,7 +18,14 @@ import {
   CheckpointClient,
   isKubernetesEnvironment,
 } from "@trigger.dev/core/v3/serverOnly";
-import { createK8sApi, RUNTIME_ENV } from "./clients/kubernetes.js";
+import { createK8sApi } from "./clients/kubernetes.js";
+import { collectDefaultMetrics } from "prom-client";
+import { register } from "./metrics.js";
+import { PodCleaner } from "./services/podCleaner.js";
+
+if (env.METRICS_COLLECT_DEFAULTS) {
+  collectDefaultMetrics({ register });
+}
 
 class ManagedSupervisor {
   private readonly workerSession: SupervisorSession;
@@ -28,6 +35,7 @@ class ManagedSupervisor {
   private readonly logger = new SimpleStructuredLogger("managed-worker");
   private readonly resourceMonitor: ResourceMonitor;
   private readonly checkpointClient?: CheckpointClient;
+  private readonly podCleaner?: PodCleaner;
 
   private readonly isKubernetes = isKubernetesEnvironment(env.KUBERNETES_FORCE_ENABLED);
   private readonly warmStartUrl = env.TRIGGER_WARM_START_URL;
@@ -37,6 +45,14 @@ class ManagedSupervisor {
     const workloadApiDomain = env.TRIGGER_WORKLOAD_API_DOMAIN;
     const workloadApiPortExternal = env.TRIGGER_WORKLOAD_API_PORT_EXTERNAL;
 
+    if (env.POD_CLEANER_ENABLED) {
+      this.podCleaner = new PodCleaner({
+        namespace: env.KUBERNETES_NAMESPACE,
+        batchSize: env.POD_CLEANER_BATCH_SIZE,
+        intervalMs: env.POD_CLEANER_INTERVAL_MS,
+      });
+    }
+
     if (this.warmStartUrl) {
       this.logger.log("[ManagedWorker] 🔥 Warm starts enabled", {
         warmStartUrl: this.warmStartUrl,
@@ -273,6 +289,10 @@ class ManagedSupervisor {
   async start() {
     this.logger.log("[ManagedWorker] Starting up");
 
+    if (this.podCleaner) {
+      await this.podCleaner.start();
+    }
+
     if (env.TRIGGER_WORKLOAD_API_ENABLED) {
       this.logger.log("[ManagedWorker] Workload API enabled", {
         protocol: env.TRIGGER_WORKLOAD_API_PROTOCOL,
@@ -292,6 +312,10 @@ class ManagedSupervisor {
   async stop() {
     this.logger.log("[ManagedWorker] Shutting down");
     await this.httpServer.stop();
+
+    if (this.podCleaner) {
+      await this.podCleaner.stop();
+    }
   }
 }
 

apps/supervisor/src/metrics.ts

@@ -0,0 +1,3 @@
+import { Registry } from "prom-client";
+
+export const register = new Registry();