Kamal: Why and how you should leave the cloud?
By Guillaume Briday
Before starting
- Quick introduction
- Not a silver bullet
- Know your context
- Not a technical demo
Back in my days...
Timeline
IaaS vs PaaS
What's the difference?
PaaS features
- "It just works"
- "It's reliable"
- "It's easy"
- "It's performant"
- "It's scalable"
- "I don't need to hire a DevOps"
IAAS features
- "It's complicated"
- "It's not reliable"
- "It's not secure"
- "It's slow"
- "It's not scalable"
How to deploy on a Paas?
How to deploy on a IaaS?
- Hardening your server
- Install NGINX
- Install PG
- Install Redis
- Install all dependencies
- Find a way to deploy your app
- Maintain the server
- And so on...
How to deploy on a IaaS?
Capistrano
Forge
Hatchbox
PaaS is just one piece of the puzzle
- Off-site Backups
- Emails
- DB scaling
- CDN
- Logs
- APM
- S3
Deploying on a IaaS?
It's not that complicated.
Deploying on a IaaS?
- We are not in 2007 anymore
- It just works, exactly like a PaaS
- Everything is mostly automatic now
Deploying on a IaaS?
Deploying on a IaaS?
- Hardening your server
- Install NGINX
- Install PG
- Install Redis
- Install all dependencies
- Find a way to deploy your app
- Maintain the server
- And so on...
Hardening your server?
- Disable SSH password login
- Install UFW
- Install Fail2Ban
- Install unattended-upgrades
Hardening your server?
Hardening your server?
# hosts.ini
[webservers]
192.168.0.1
192.168.0.2
192.168.0.3
$ ansible-playbook -i hosts.ini playbook.yml
Deploying on IaaS?
- PaaS are nice UI for IaaS (with extra Markup)
- PaaS make you believe it's hard
- PaaS are as reliable as IaaS
- PaaS are as performant as IaaS
deploying on a Iaas?
What about the scalability?
You don't have (real) scalability issues.
What about the scalability?
- Growth is mostly linear
- It depends on other teams and actions
- Your business will fail before it hits hard
- Auto-scaling is a solution to a non-existing problem
- IaaS are x100 cheaper than PaaS anyway
What about the scalability?
Introducing Kamal 2
- Based on Docker
- SSL included
- Fully transparent
- Basically, Kamal is Capistrano for Containers
- Runs everywhere
Introducing Kamal 2
- It just works
- It takes 10 minutes to bootstrap and deploy on a new server
- You can still use Cloud tools
Introducing Kamal 2
Conclusion
- The best alternative to PaaS, so far
- Keep your money for R&D
- Much simpler than you’d expect
- Absolutely worth a try
Thanks! 🙏
Kamal: Why and how you should leave the cloud? By Guillaume Briday