wrangler.jsonc

{
  // Example: Worker + Durable Object hosting a Cloudflare Container that
  // the Durable Object schedules itself, rather than one the platform
  // places and sizes.
  //
  // The containers block below is the whole difference from
  // examples/container-legacy. Under `scheduling_policy: "durable_object"`
  // the object owns the container lifecycle, so:
  //
  //   - `images` replaces `image`. Wrangler prepares each entry and
  //     exposes it as `ctx.container.images.<key>`; the backend's `name`
  //     option names the key to boot.
  //   - `instance_type` and `max_instances` are rejected. Sizing belongs
  //     to the object now, so it is requested at launch through the
  //     backend's `instance` option (see src/index.ts).
  //
  // Wrangler accepts only `name`, `class_name`, `scheduling_policy`,
  // `images`, `observability`, and `unsafe.configuration.experimental_flags`
  // under this policy. Anything else fails the deploy.
  "$schema": "node_modules/wrangler/config-schema.json",
  "name": "computer-container-instance-example",
  "main": "src/index.ts",
  "compatibility_date": "2026-05-26",
  "compatibility_flags": ["nodejs_compat"],

  "containers": [
    {
      "class_name": "ContainerExample",
      "scheduling_policy": "durable_object",
      "images": {
        // Built from the local Dockerfile, which COPYs the computerd
        // binary staged into ./build/ by the predev / predeploy hook.
        "app": { "dockerfile": "./Dockerfile" }
      },
      "observability": {
        "enabled": true
      }
    }
  ],

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

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

  "observability": {
    "traces": {
      "enabled": true
    }
  }
}