Heroku to Dokku: A Rails Dev's Migration Tale

The Cost-Benefit Realization

As a Rails developer who recently migrated from Heroku to Dokku, I want to share my journey and the surprising benefits I discovered. This transition wasn't just about cost savings—it opened up new possibilities for my deployment workflow.

The Heroku Challenge

Before diving into Dokku's benefits, let me share why I started looking for alternatives. Heroku had been my go-to platform for years, offering:

Zero-configuration deployments
Excellent developer experience
Reliable infrastructure
Built-in add-ons

However, recent changes created some challenges:

Removal of free tier
Significant cost increases for basic dynos
Sleep states affecting development apps
Add-on costs adding up quickly

Why Dokku Won Me Over

1. Cost Efficiency

# Monthly Cost Comparison for a Basic Rails Setup
heroku_cost = {
  basic_dyno: 7,
  postgres: 9,
  redis: 15,
  ssl: 20,
  total: 51
}

dokku_cost = {
  server_2gb: 10,
  managed_databases: 0,  # Included!
  ssl: 0,               # Free via Let's Encrypt
  total: 10
}

2. Infrastructure Control

Unlike Heroku's black box approach, Dokku lets me:

Choose my server provider (Digital Ocean, Linode, AWS)
Customize server resources
Configure nginx directly
Manage database backups my way

3. Multi-App Efficiency

One of my favorite discoveries:

# Deploy multiple apps on one server
dokku apps:create rails-app-1
dokku apps:create rails-app-2
dokku apps:create rails-app-3

# Each with its own domains and SSL
dokku domains:set rails-app-1 app1.domain.com
dokku domains:set rails-app-2 app2.domain.com

4. Familiar Workflow

Dokku maintains Heroku's git-based deployment:

# Just like Heroku
git push dokku main

# Even supports release phase
dokku config:set rails-app-1 DOKKU_RELEASE_COMMAND="rails db:migrate"

5. Database Flexibility

My Rails apps often need multiple databases:

# Create separate databases for different concerns
dokku postgres:create main_db
dokku postgres:create analytics_db
dokku postgres:create cache_db

# Link them easily
dokku postgres:link main_db rails-app

6. Custom Plugin Ecosystem

Beyond basic features:

# Install useful plugins
sudo dokku plugin:install https://github.com/dokku/dokku-postgres.git
sudo dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git
sudo dokku plugin:install https://github.com/dokku/dokku-redis.git

Real-World Benefits I've Experienced

Development Environment

Faster deployments (no queue waiting)
Direct log access
Quick database operations
Custom domain management

Production Advantages

Significant cost savings
Better resource utilization
Full control over backups
Custom monitoring solutions

Scaling Capabilities

# Scale processes individually
dokku ps:scale web=2
dokku ps:scale worker=1

# Monitor resource usage
dokku ps:report

Making the Transition Easier

Here's what helped me during migration:

Environment Variable Management

# Export from Heroku
heroku config -a your-app > config.txt

# Import to Dokku
while read line; do
  dokku config:set your-app $line
done < config.txt

Database Migration

# Export from Heroku
heroku pg:backups:capture
heroku pg:backups:download

# Import to Dokku
dokku postgres:import database < latest.dump

When to Choose Dokku Over Heroku

Consider Dokku when you:

Need cost-effective hosting
Want multiple apps on one server
Require custom infrastructure
Have basic sysadmin knowledge
Value deployment flexibility

Stay with Heroku if you:

Need enterprise-level support
Require zero server management
Want managed add-on services
Have a larger team needing access controls

Learning Curve and ROI

The initial setup took me about a day, but the benefits were immediate:

Monthly costs dropped by 80%
Deployment times improved
More control over infrastructure
Better understanding of my stack

Conclusion

My journey from Heroku to Dokku has been transformative. While Heroku remains an excellent platform, Dokku provides a powerful, cost-effective alternative that doesn't compromise on developer experience. The learning curve is worth the benefits, especially for Rails applications where cost and control matter.

Remember: Dokku isn't just a Heroku alternative—it's a different way of thinking about deployments that empowers developers to take control of their infrastructure while maintaining the simplicity we love about Platform as a Service solutions.

If you're considering the switch, feel free to reach out. The Rails community around Dokku is growing, and sharing experiences helps everyone succeed in their deployment journey!

Happy Coding!

Heroku to Dokku: A Rails Dev's Migration Tale

Comments

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The Cost-Benefit Realization

The Heroku Challenge

Why Dokku Won Me Over

1. Cost Efficiency

2. Infrastructure Control

3. Multi-App Efficiency

4. Familiar Workflow

5. Database Flexibility

6. Custom Plugin Ecosystem

Real-World Benefits I've Experienced

Development Environment

Production Advantages

Scaling Capabilities

Making the Transition Easier

When to Choose Dokku Over Heroku

Learning Curve and ROI

Conclusion

Command Palette

Comments

Rails Deployment

Rails 8 CI/CD: GitHub Actions & Kamal 2025

More from this blog

The Cost-Benefit Realization

The Heroku Challenge

Why Dokku Won Me Over

1. Cost Efficiency

2. Infrastructure Control

3. Multi-App Efficiency

4. Familiar Workflow

5. Database Flexibility

6. Custom Plugin Ecosystem

Real-World Benefits I've Experienced

Development Environment

Production Advantages

Scaling Capabilities

Making the Transition Easier

When to Choose Dokku Over Heroku

Learning Curve and ROI

Conclusion