CI/CD/AUTOMATION

CI

• Continuous integration or CI
• The practice of merging all developer working copies to shared mainline several times a day.
• Grady Booch first proposed CI
• Extreme programming or XP adopted CI concept
• requires continuous testing

CD

• Continuous delivery or CD
• CD automates delivery of applications to production.
• CD provides automated way to push code changes to them. 
• requires continuous testing
• CD automation performs any necessary service calls to
  • web servers
  • databases
  • other services
• that may need to be restarted or follow other procedures when applications are deployed.

Automation

• is the automatic execution of tasks without human interference.
• aims to minimize and do away with human intervention.
• using technology to control and monitor
  • the production and
  • delivery of various goods and services.
• It performs tasks that were previously performed by humans.
• simplifies complicated tasks by reducing them to a single instance.
• with press of a button or a simple command execute automation script
• results in cost optimization