Deploy your Cloudflare app to Fly.io
Step-by-step deployment help for Cloudflare apps on Fly.io. We fix Cloudflare-specific deployment issues, configure Fly.io, and get your app live. From $19.
Cloudflare issues we fix before deploying
Common Cloudflare problems that affect Fly.io deployments.
Node.js API incompatibility
Code using Node.js-specific APIs (fs, Buffer, crypto) that don't exist in the Cloudflare Workers runtime, causing deployment failures.
Missing security headers
No Content-Security-Policy, X-Frame-Options, or HSTS headers configured, even though Cloudflare makes them easy to add via Workers or page rules.
KV storage race conditions
Cloudflare KV is eventually consistent. Code that reads-then-writes without accounting for propagation delays causes data loss and stale reads.
Worker size limits exceeded
Bundled Workers exceeding the 1MB compressed size limit due to large dependencies, preventing deployment.
Fly.io deployment issues we check for
Common Fly.io problems that break Cloudflare apps in production.
Dockerfile missing or misconfigured
Fly.io requires a Dockerfile for deployment. AI tools that scaffold without one force flyctl to auto-generate a suboptimal Dockerfile that misses build steps.
Volume only available in a single region
Fly volumes are pinned to one region. Multi-region deployments try to access a volume that doesn't exist in other regions, causing crashes.
Machine restarts losing in-memory state
AI-generated apps store session data or caches in memory. Fly machines can restart or migrate, wiping all in-memory state without warning.
Internal DNS resolution failing between services
Services within a Fly organization communicate via <app>.internal hostnames, but AI-generated code hardcodes localhost or public URLs.
Start with a self-serve audit
Get a professional review of your Cloudflare project before deploying to Fly.io.
External Security Scan
Black-box review of your public-facing app. No code access needed.
- OWASP Top 10 vulnerability check
- SSL/TLS configuration analysis
- Security header assessment
- Expert review within 24h
Code Audit
In-depth review of your source code for security, quality, and best practices.
- Security vulnerability analysis
- Code quality review
- Dependency audit
- Architecture review
- Expert + AI code analysis
Complete Bundle
Both scans in one package with cross-referenced findings.
- Everything in both products
- Cross-referenced findings
- Unified action plan
100% credited toward any paid service. Start with an audit, then let us fix what we find.
How it works
Tell us about your app
Share your project details and what you need help with.
Expert + AI audit
A human expert assisted by AI reviews your code within 24 hours.
Launch with confidence
We fix what needs fixing and stick around to help.
Frequently asked questions
How do I deploy a Cloudflare app to Fly.io?
We handle Cloudflare deployments to Fly.io end to end. Start with our code audit ($19) to identify deployment blockers specific to your Cloudflare project, then we configure Fly.io, fix issues, and get your app live in production.
What Cloudflare issues affect Fly.io deployments?
Cloudflare projects commonly have node.js api incompatibility and missing security headers. On Fly.io, these combine with dockerfile missing or misconfigured and volume only available in a single region to cause deployment failures.
Can SpringCode deploy my Cloudflare project to Fly.io?
Yes. We specialize in deploying Cloudflare applications to Fly.io. We audit your codebase for Cloudflare-specific issues, configure Fly.io correctly, and handle the full deployment so your app runs reliably in production.
What does Cloudflare deployment to Fly.io cost?
Our code audit ($19) identifies all Fly.io deployment blockers in your Cloudflare project. Full deployment assistance is scoped with a fixed quote after the audit — no hourly billing or surprise charges.
Related resources
Other techs on Fly.io
Deploy Cloudflare elsewhere
Need help deploying Cloudflare to Fly.io?
Tell us about your project. We'll respond within 24 hours with a clear plan and fixed quote.