references/pulumi/gotchas.md

# Troubleshooting & Best Practices

## Common Errors

### "No bundler/build step" - Pulumi uploads raw code

**Problem:** Worker fails with "Cannot use import statement outside a module"  
**Cause:** Pulumi doesn't bundle Worker code - uploads exactly what you provide  
**Solution:** Build Worker BEFORE Pulumi deploy

```typescript
// WRONG: Pulumi won't bundle this
const worker = new cloudflare.WorkerScript("worker", {
    content: fs.readFileSync("./src/index.ts", "utf8"), // Raw TS file
});

// RIGHT: Build first, then deploy
import * as command from "@pulumi/command";
const build = new command.local.Command("build", {
    create: "npm run build",
    dir: "./worker",
});
const worker = new cloudflare.WorkerScript("worker", {
    content: build.stdout.apply(() => fs.readFileSync("./worker/dist/index.js", "utf8")),
}, {dependsOn: [build]});
```

### "wrangler.toml not consumed" - Config drift

**Problem:** Local wrangler dev works, Pulumi deploy fails  
**Cause:** Pulumi ignores wrangler.toml - must duplicate config  
**Solution:** Generate wrangler.toml from Pulumi or keep synced manually

```typescript
// Pattern: Export Pulumi config to wrangler.toml
const workerConfig = {
    name: "my-worker",
    compatibilityDate: "2025-01-01",
    compatibilityFlags: ["nodejs_compat"],
};

new command.local.Command("generate-wrangler", {
    create: pulumi.interpolate`cat > wrangler.toml <<EOF
name = "${workerConfig.name}"
compatibility_date = "${workerConfig.compatibilityDate}"
compatibility_flags = ${JSON.stringify(workerConfig.compatibilityFlags)}
EOF`,
});
```

### "False no-changes detection" - Content SHA unchanged

**Problem:** Worker code updated, Pulumi says "no changes"  
**Cause:** Content hash identical (whitespace/comment-only change)  
**Solution:** Add build timestamp or version to force update

```typescript
const version = Date.now().toString();
const worker = new cloudflare.WorkerScript("worker", {
    content: code,
    plainTextBindings: [{name: "VERSION", text: version}], // Forces new deployment
});
```

### "D1 migrations don't run on pulumi up"

**Problem:** Database schema not applied after D1 database created  
**Cause:** Pulumi creates database but doesn't run migrations  
**Solution:** Use Command resource with dependsOn

```typescript
const db = new cloudflare.D1Database("db", {accountId, name: "mydb"});

// Run migrations after DB created
const migration = new command.local.Command("migrate", {
    create: pulumi.interpolate`wrangler d1 execute ${db.name} --file ./schema.sql`,
}, {dependsOn: [db]});

// Worker depends on migrations
const worker = new cloudflare.WorkerScript("worker", {
    d1DatabaseBindings: [{name: "DB", databaseId: db.id}],
}, {dependsOn: [migration]});
```

### "Missing required property 'accountId'"

**Problem:** `Error: Missing required property 'accountId'`  
**Cause:** Account ID not provided in resource configuration  
**Solution:** Add to stack config

```yaml
# Pulumi.<stack>.yaml
config:
  cloudflare:accountId: "abc123..."
```

### "Binding name mismatch"

**Problem:** Worker fails with "env.MY_KV is undefined"  
**Cause:** Binding name in Pulumi != name in Worker code  
**Solution:** Match exactly (case-sensitive)

```typescript
// Pulumi
kvNamespaceBindings: [{name: "MY_KV", namespaceId: kv.id}]

// Worker code
export default { async fetch(request, env) { await env.MY_KV.get("key"); }}
```

### "API token permissions insufficient"

**Problem:** `Error: authentication error (10000)`  
**Cause:** Token lacks required permissions  
**Solution:** Grant token permissions: Account.Workers Scripts:Edit, Account.Account Settings:Read

### "Resource not found after import"

**Problem:** Imported resource shows as changed on next `pulumi up`  
**Cause:** State mismatch between actual resource and Pulumi config  
**Solution:** Check property names/types match exactly

```bash
pulumi import cloudflare:index/workerScript:WorkerScript my-worker <account_id>/<worker_name>
pulumi preview # If shows changes, adjust Pulumi code to match actual resource
```

### "v6.x Worker versioning confusion"

**Problem:** Worker deployed but not receiving traffic  
**Cause:** v6.x requires Worker + WorkerVersion + WorkersDeployment (3 resources)  
**Solution:** Use WorkerScript (auto-versioning) OR full versioning pattern

```typescript
// SIMPLE: WorkerScript auto-versions (default behavior)
const worker = new cloudflare.WorkerScript("worker", {
    accountId, name: "my-worker", content: code,
});

// ADVANCED: Manual versioning for gradual rollouts (v6.x)
const worker = new cloudflare.Worker("worker", {accountId, name: "my-worker"});
const version = new cloudflare.WorkerVersion("v1", {
    accountId, workerId: worker.id, content: code, compatibilityDate: "2025-01-01",
});
const deployment = new cloudflare.WorkersDeployment("prod", {
    accountId, workerId: worker.id, versionId: version.id,
});
```

## Best Practices

1. **Always set compatibilityDate** - Locks Worker behavior, prevents breaking changes
2. **Build before deploy** - Pulumi doesn't bundle; use Command resource or CI build step
3. **Match binding names** - Case-sensitive, must match between Pulumi and Worker code
4. **Use dependsOn for migrations** - Ensure D1 migrations run before Worker deploys
5. **Version Worker content** - Add VERSION binding to force redeployment on content changes
6. **Store secrets in stack config** - Use `pulumi config set --secret` for API keys

## Limits

| Resource | Limit | Notes |
|----------|-------|-------|
| Worker script size | 10 MB | Includes all dependencies, after compression |
| Worker CPU time | 50ms (free), 30s (paid) | Per request |
| KV keys per namespace | Unlimited | 1000 ops/sec write, 100k ops/sec read |
| R2 storage | Unlimited | Class A ops: 1M/mo free, Class B: 10M/mo free |
| D1 databases | 50,000 per account | Free: 10 per account, 5 GB each |
| Queues | 10,000 per account | Free: 1M ops/day |
| Pages projects | 500 per account | Free: 100 projects |
| API requests | Varies by plan | ~1200 req/5min on free |

## Resources

- **Pulumi Registry:** https://www.pulumi.com/registry/packages/cloudflare/
- **API Docs:** https://www.pulumi.com/registry/packages/cloudflare/api-docs/
- **GitHub:** https://github.com/pulumi/pulumi-cloudflare
- **Cloudflare Docs:** https://developers.cloudflare.com/
- **Workers Docs:** https://developers.cloudflare.com/workers/

---
See: [README.md](./README.md), [configuration.md](./configuration.md), [api.md](./api.md), [patterns.md](./patterns.md)