CI/CD/Automation

Continuous integration or CI
Process to merge working software copies from developer to common and shared copy multiple time on daily basis
Grady Booch first proposed CI
Extreme programming or XP adopted CI concept
requires continuous testing

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 process may also update following servers
- web servers
- databases
- other services
- servers might be restarted or switchover may be applied during application deployment

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.
Automation can do all tasks being done by humans
simplifies complicated tasks by reducing them to a single instance.
Tasks are done by a button press or command execution or automation script being executed
results in cost optimization