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Zuul 3, a modern solution for CI/CD
Continuous Progress
Zuul 3 brings a new approach to the DevOps challenge. (For more on these important DevOps concepts, see the "CI and CD" box.) Whereas other CI/CD tools like Jenkins, Bamboo, or TeamCity focus on constant building and testing, Zuul's main design goal is to be a gating mechanism. In other words, as soon as a proposed change is verified and approved by a human, it can undergo final tests and be deployed automatically to the production environment. Such a system requires a lot of computing power, but Zuul has been proven reliable and highly scalable by its designers: the OpenStack community.
CI and CD
CI and CD are terms that pop up frequently in discussions of modern software development (Figure 1). CI stands for continuous integration , a practice that focuses on making releases easier to prepare. CD can mean either continuous delivery or continuous deployment , and although these practices have a lot in common, they also have significant differences [1].
Figure 1: Simply put, continuous integration is part of both continuous delivery and
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