Grey Haven Cloudflare Deployment

Grey Haven Cloudflare Deployment

Deploy TanStack Start applications to Cloudflare Workers using GitHub Actions, Doppler for secrets, and Wrangler CLI.

Deployment Architecture

TanStack Start on Cloudflare Workers

• SSR: Server-side rendering with TanStack Start server functions
• Edge Runtime: Global deployment on Cloudflare's edge network
• Database: PostgreSQL (PlanetScale) with connection pooling
• Cache: Cloudflare KV for sessions, R2 for file uploads
• Secrets: Managed via Doppler, injected in GitHub Actions

Core Infrastructure

• Workers: Edge compute (TanStack Start)
• KV Storage: Session management
• R2 Storage: File uploads and assets
• D1 Database: Edge data (optional)
• Queues: Background jobs (optional)

Wrangler Configuration

Basic wrangler.toml

name = "grey-haven-app"
main = "dist/​server/​index.js"
compatibility_date = "2025-01-15"
node_compat = true

[vars]
ENVIRONMENT = "production"
DATABASE_POOL_MIN = "2"
DATABASE_POOL_MAX = "10"

# KV namespace for session storage
[[kv_namespaces]]
binding = "SESSIONS"
id = "your-kv-namespace-id"
preview_id = "your-preview-kv-namespace-id"

# R2 bucket for file uploads
[[r2_buckets]]
binding = "UPLOADS"
bucket_name = "grey-haven-uploads"
preview_bucket_name = "grey-haven-uploads-preview"

# Routes
routes = [
  { pattern = "app.greyhaven.studio", zone_name = "greyhaven.studio" }
]

Environment-Specific Configs

• Development: wrangler.toml with ENVIRONMENT = "development"
• Staging: wrangler.staging.toml with staging routes
• Production: wrangler.production.toml with production routes

Doppler Integration

Required GitHub Secrets

• DOPPLER_TOKEN: Doppler service token for CI/​CD
• CLOUDFLARE_API_TOKEN: Wrangler deployment token

Required Doppler Secrets (Production)

# Application
BETTER_AUTH_SECRET=<random-secret>
BETTER_AUTH_URL=https://app.greyhaven.studio
JWT_SECRET_KEY=<random-secret>

# Database (PlanetScale)
DATABASE_URL=postgresql://user:pass@host/​db
DATABASE_URL_ADMIN=postgresql://admin:pass@host/​db

# Redis (Upstash)
REDIS_URL=redis://user:pass@host:port

# Email (Resend)
RESEND_API_KEY=re_...

# OAuth Providers
GOOGLE_CLIENT_ID=...
GOOGLE_CLIENT_SECRET=...
GITHUB_CLIENT_ID=...
GITHUB_CLIENT_SECRET=...

# Cloudflare
CLOUDFLARE_ACCOUNT_ID=...
CLOUDFLARE_API_TOKEN=...

# Monitoring (optional)
SENTRY_DSN=https://[email protected]/​...
AXIOM_TOKEN=xaat-...

GitHub Actions Deployment

Production Deployment Flow

# .github/​workflows/​deploy-production.yml
- Checkout code
- Setup Node.js 22 with cache
- Install dependencies (npm ci)
- Install Doppler CLI
- Run tests (doppler run --config test)
- Build (doppler run --config production)
- Run database migrations
- Deploy to Cloudflare Workers
- Inject secrets from Doppler
- Run smoke tests
- Rollback on failure

Key Deployment Commands

# Build with Doppler secrets
doppler run --config production -- npm run build

# Run migrations before deployment
doppler run --config production -- npm run db:migrate

# Deploy to Cloudflare
npx wrangler deploy --config wrangler.production.toml

# Inject secrets into Workers
doppler secrets download --config production --format json > secrets.json
cat secrets.json | jq -r 'to_entries | .[] | "\(.key)=\(.value)"' | while read -r line; do
  key=$(echo "$line" | cut -d= -f1)
  value=$(echo "$line" | cut -d= -f2-)
  echo "$value" | npx wrangler secret put "$key"
done
rm secrets.json

Database Migrations

Drizzle Migrations (TanStack Start)

// scripts/​migrate.ts
import { drizzle } from "drizzle-orm/​node-postgres";
import { migrate } from "drizzle-orm/​node-postgres/​migrator";
import { Pool } from "pg";

const pool = new Pool({
  connectionString: process.env.DATABASE_URL_ADMIN,
});

const db = drizzle(pool);

async function main() {
  console.log("Running migrations...");
  await migrate(db, { migrationsFolder: "./​drizzle/​migrations" });
  console.log("Migrations complete!");
  await pool.end();
}

main().catch((err) => {
  console.error("Migration failed:", err);
  process.exit(1);
});

package.json scripts:

{
  "scripts": {
    "db:migrate": "tsx scripts/​migrate.ts",
    "db:migrate:production": "doppler run --config production -- tsx scripts/​migrate.ts"
  }
}

Rollback Procedures

Wrangler Rollback

# List recent deployments
npx wrangler deployments list --config wrangler.production.toml

# Rollback to previous deployment
npx wrangler rollback --config wrangler.production.toml

# Rollback to specific deployment ID
npx wrangler rollback --deployment-id abc123 --config wrangler.production.toml

Database Rollback

# Drizzle - rollback last migration
doppler run --config production -- drizzle-kit migrate:rollback

# Alembic - rollback one migration
doppler run --config production -- alembic downgrade -1

Emergency Rollback Playbook

1. Identify issue: Check Cloudflare Workers logs, Sentry
2. Rollback Workers: npx wrangler rollback
3. Rollback database (if needed): drizzle-kit migrate:rollback
4. Verify rollback: Run smoke tests
5. Notify team: Update Linear issue
6. Root cause analysis: Create postmortem

Cloudflare Resources Setup

KV Namespace (Session Storage)

# Create KV namespace
npx wrangler kv:namespace create "SESSIONS" --config wrangler.production.toml
npx wrangler kv:namespace create "SESSIONS" --preview --config wrangler.production.toml

# List KV namespaces
npx wrangler kv:namespace list

R2 Bucket (File Uploads)

# Create R2 bucket
npx wrangler r2 bucket create grey-haven-uploads
npx wrangler r2 bucket create grey-haven-uploads-preview

# List R2 buckets
npx wrangler r2 bucket list

Monitoring

Wrangler Tail (Real-time Logs)

# Stream production logs
npx wrangler tail --config wrangler.production.toml

# Filter by status code
npx wrangler tail --status error --config wrangler.production.toml

Sentry Integration (Error Tracking)

import * as Sentry from "@sentry/​browser";

Sentry.init({
  dsn: process.env.SENTRY_DSN,
  environment: process.env.ENVIRONMENT,
  tracesSampleRate: 1.0,
});

Local Development

Wrangler Dev (Local Workers)

# Run Workers locally with Doppler
doppler run --config dev -- npx wrangler dev

# Run with remote mode (uses production KV/​R2)
doppler run --config dev -- npx wrangler dev --remote

Supporting Documentation

All supporting files are under 500 lines per Anthropic best practices:

• examples/ - Complete deployment examples

  • github-actions-workflow.md - Full CI/​CD workflows
  • wrangler-config.md - Complete wrangler.toml examples
  • doppler-secrets.md - Secret management patterns
  • migrations.md - Database migration examples
  • INDEX.md - Examples navigation

• reference/ - Deployment references

  • rollback-procedures.md - Rollback strategies
  • monitoring.md - Monitoring and alerting
  • troubleshooting.md - Common issues and fixes
  • INDEX.md - Reference navigation

• templates/ - Copy-paste ready templates

  • wrangler.toml - Basic wrangler config
  • deploy-production.yml - GitHub Actions workflow

• checklists/ - Deployment checklists

  • deployment-checklist.md - Pre-deployment validation

When to Apply This Skill

Use this skill when:

• Deploying TanStack Start to Cloudflare Workers
• Setting up CI/​CD with GitHub Actions
• Configuring Doppler multi-environment secrets
• Running database migrations in production
• Rolling back failed deployments
• Setting up KV namespaces or R2 buckets
• Troubleshooting deployment failures
• Configuring monitoring and alerting

Template Reference

These patterns are from Grey Haven's production templates:

• cvi-template: TanStack Start + Cloudflare Workers
• cvi-backend-template: FastAPI + Python Workers

Critical Reminders

1. Doppler for ALL secrets: Never commit secrets to git
2. Migrations BEFORE deployment: Run db:migrate before wrangler deploy
3. Smoke tests AFTER deployment: Validate production after deploy
4. Automated rollback: GitHub Actions rolls back on failure
5. Connection pooling: Match wrangler.toml pool settings with database
6. Environment-specific configs: Separate wrangler files per environment
7. KV/​R2 bindings: Configure in wrangler.toml, create with CLI
8. Custom domains: Use Cloudflare Proxy for DDoS protection
9. Monitoring: Set up Sentry + Axiom + Wrangler tail
10. Emergency playbook: Know how to rollback both Workers and database