What are the pillars of continuous delivery?

Continuous delivery is a software development approach in which code changes are automatically built, tested, and deployed to production. It is designed to enable rapid and reliable software delivery, and is based on a set of core principles or pillars that define how the process should work.

The pillars of continuous delivery are:

1. Version control: All code and related artifacts are stored in a version control system, such as Git, to enable traceability and collaboration.
2. Build automation: Code changes are automatically compiled, packaged, and built into a deployable artifact.
3. Testing: Code changes are automatically tested to ensure that they meet quality and performance standards.
4. Deployment automation: Code changes are automatically deployed to production or other environments, using tools such as Ansible, Chef, Puppet, or Docker.
5. Configuration management: The infrastructure and dependencies required to run the software are managed and configured using tools such as Ansible, Chef, Puppet, or Docker.
6. Monitoring: The software is continuously monitored in production to detect and diagnose issues.

By adhering to these pillars, organizations can achieve a high level of automation and reliability in their software delivery process, enabling them to deliver software updates and new features to users more quickly and with fewer errors.