Continuous delivery

Principles of software delivery

• create a repeatable, reliable process
• automate almost everything
• keep everything in version control
• if it hurts, do it more frequently
• build quality in
• done means released
• everybody is responsible for the delivery process

Deploying risks

• break existing expected behaviours of the system
• introduce new unexpected behaviours of the system
• corrupt the data because of a scheme design mistake or failed migration
• introduce performance problem

We need safety measures to prevent this. We have continuous delivery to increase the safety and speed of changes.