Railway Deployment Skill

Railway Deployment Skill

This skill provides workflows and knowledge for deploying and managing applications on Railway.

Overview

Railway is a modern cloud platform for deploying applications. This skill integrates with the Railway MCP tools to provide deployment, monitoring, and management capabilities.

Prerequisites

Before using Railway MCP tools:

1. Install Railway CLI: https://docs.railway.com/guides/cli
2. Authenticate: Run railway login in terminal
3. Link project: Run railway link in the project directory

Available MCP Tools

Deployment Workflow

First-Time Setup

1. Verify CLI authentication:

   Use check-railway-status to confirm Railway CLI is logged in
   

2. Link project (if not linked):

   • User runs railway login in terminal
   • User runs railway link in the project directory
   • Or use create-project-and-link for new projects

3. Configure root directory (for monorepos):

   • If app is in a subdirectory (e.g., web/, app/, frontend/), configure in Railway Dashboard:
   • Service → Settings → Source → Root Directory

Deployment Process

1. Check current status:

   list-deployments with json=true to see recent deployment statuses
   

2. If deployment failed, check logs:

   get-logs with logType="build" and the failed deploymentId
   

3. Common build failures:

   • Missing root directory configuration (monorepos)
   • Syntax errors in code
   • Missing dependencies
   • Invalid environment variables

4. Deploy changes:

   • Push to GitHub (auto-deploy if connected)
   • Or use deploy tool for manual deployment

Environment Variables

1. View current variables:

   list-variables with json=true
   

2. Set new variables:

   set-variables with variables array like ["KEY=value", "KEY2=value2"]
   

3. Common patterns:

   • NEXT_PUBLIC_* - Next.js client-safe public variables
   • DATABASE_URL - Database connection string
   • *_API_KEY - API keys (server-side only)

Domain Configuration

1. Generate Railway domain:

   generate-domain to get a *.up.railway.app domain
   

2. Custom domains:

   • Configure in Railway Dashboard: Service → Settings → Public Networking
   • Add CNAME record at DNS provider pointing to Railway domain

Framework-Specific Configuration

Next.js

railway.toml (place in app root):

[build]
builder = "nixpacks"

[deploy]
startCommand = "npm run start"
healthcheckPath = "/"
healthcheckTimeout = 300
restartPolicyType = "ON_FAILURE"
restartPolicyMaxRetries = 10

Node.js/​Express

railway.toml:

[build]
builder = "nixpacks"

[deploy]
startCommand = "node server.js"
healthcheckPath = "/​health"

Python/​FastAPI

railway.toml:

[build]
builder = "nixpacks"

[deploy]
startCommand = "uvicorn main:app --host 0.0.0.0 --port $PORT"
healthcheckPath = "/​health"

Python/​Django

railway.toml:

[build]
builder = "nixpacks"
buildCommand = "python manage.py collectstatic --noinput"

[deploy]
startCommand = "gunicorn myproject.wsgi --bind 0.0.0.0:$PORT"
healthcheckPath = "/​health"

Troubleshooting

"Railpack could not determine how to build"

Cause: Root directory not set for monorepo structures.

Fix: Set Root Directory in Railway Dashboard → Service → Settings → Source.

Build Syntax Errors

Cause: Code pushed with syntax errors.

Fix:

1. Check build logs: get-logs with logType="build"
2. Fix the error locally
3. Push the fix to trigger new deployment

Missing Environment Variables

Cause: Required environment variables not set.

Fix:

1. Check current vars: list-variables
2. Set missing vars: set-variables

Domain Not Working

Cause: DNS not configured or not propagated.

Fix:

1. Verify CNAME record points to Railway domain
2. Wait for DNS propagation (up to 72 hours)
3. Check Railway Dashboard for verification status

Port Configuration

Railway automatically provides a PORT environment variable. Ensure your application listens on 0.0.0.0:$PORT.

Node.js:

const port = process.env.PORT || 3000;
app.listen(port, '0.0.0.0', () => console.log(`Listening on ${port}`));

Python:

import os
port = int(os.environ.get("PORT", 8000))

Custom Domain Setup by Provider

Cloudflare (Recommended)

1. Add CNAME record: @ → Railway domain
2. Enable Cloudflare proxy (orange cloud)
3. Set SSL/​TLS to "Full" (not Full Strict)
4. Enable Universal SSL

GoDaddy / Providers Without CNAME Flattening

GoDaddy and some providers don't support CNAME flattening for root domains. Options:

1. Use subdomain: www.domain.com or app.domain.com with CNAME record
2. Migrate DNS to Cloudflare: Change nameservers in registrar
3. Use forwarding: Forward root to www subdomain

Standard CNAME Setup

For subdomains on any provider:

1. In Railway: Add custom domain (e.g., app.yourdomain.com)
2. Copy the CNAME target (e.g., abc123.up.railway.app)
3. In DNS: Add CNAME record pointing subdomain to Railway target
4. Wait for verification in Railway Dashboard

Project Configuration Template

After importing this skill, add project-specific details to your local skill copy:

## Project Configuration

- **Project Name:** [Your Project]
- **Project ID:** [from Railway Dashboard]
- **Environment ID:** [from Railway Dashboard]
- **Service ID:** [from Railway Dashboard]
- **Root Directory:** [e.g., web/, app/, or /]
- **Custom Domain:** [if configured]
- **Dashboard URL:** https://railway.com/​project/[project-id]

### Required Environment Variables

| Variable | Description |
|----------|-------------|
| ... | ... |