wrangler.jsonc

{
  // Example: Worker + Durable Object hosting a Cloudflare Container whose
  // ENTRYPOINT is the computerd daemon. This scaffold proves the wiring — the
  // Worker reaches the DO, the DO boots the container, the container's
  // computerd process answers /health on port 8080.
  "$schema": "node_modules/wrangler/config-schema.json",
  "name": "computer-container-example",
  "main": "src/index.ts",
  "compatibility_date": "2026-05-26",
  "compatibility_flags": ["nodejs_compat"],

  "containers": [
    {
      "class_name": "ContainerExample",
      // Built from the local Dockerfile, which COPYs the computerd binary
      // staged into ./build/ by the predev / predeploy hook.
      "image": "./Dockerfile",
      "instance_type": "standard-2",
      "max_instances": 5,
      "rollout_active_grace_period": 0,
      "rollout_step_percentage": [100]
    }
  ],

  "durable_objects": {
    "bindings": [
      {
        "name": "ContainerExample",
        "class_name": "ContainerExample"
      }
    ]
  },

  // R2 bucket mounted into every Workspace at /workspace/r2 via
  // R2Bucket(...). Seed it once with:
  //   npm run seed:r2 --workspace @example/computer-container
  // which uploads ./seed/data/hello.txt to the bucket.
  // `bucket_name` is what `wrangler dev` and `wrangler deploy` both
  // look at; omitting `preview_bucket_name` makes the same bucket
  // back the local miniflare and the deployed worker, which keeps
  // the seed scripts honest (a `--local` put and a `--remote` put
  // both target `computer-container-hello`).
  "r2_buckets": [
    {
      "binding": "Bucket",
      "bucket_name": "computer-container-hello"
    }
  ],

  "migrations": [
    {
      "tag": "v1",
      "new_sqlite_classes": ["ContainerExample"]
    }
  ],

  // Turn on the Workers Observability tracing surface. With this set,
  // the runtime traces fetch handlers, binding calls, and any user
  // spans opened via `ctx.tracing.enterSpan` or the workspace's
  // Cloudflare observer adapter. Spans appear in the dashboard under
  // Workers → Observability → Traces.
  "observability": {
    "traces": {
      "enabled": true
    }
  }
}