Continuous Full System Deployment

Tips

• Your snapshots should be as bare as possible
• Use Puppet or Chef to configure it (use the exact same thing that you used to configure production)
• Do basic tests (ping, ssh and the web server is available)

Ensure QA and Production are the same

• Deployable unit was a system image - it has to be in a Debian package
• Issue: If you do an apt-get on QA and pull down packages, that's fine. But 2 days later when deploying again to production, that package may have changed and this can introduce issues with your application. Solution: Have your own repo and cache that version. Rather than

Packages with no dependencies

Live Updating Thousands of Servers

• Image takes too long

Pain Points

• Getting different systems deployed is no problem. How do we
• Clone image/install OS/ get manifests and run them, install app, wait for system to start, run tests. 10 minute delay if you need to test something immediately