Building a CD pipeline

We have reached the point when we can safely build a CD pipeline using the tools we learned about in this chapter. We already know how CI operates and how it helps to reject changes that are unsuitable for release. The section on test automation presented different ways of making the rejection process more robust. Having smoke tests or end-to-end tests allows us to go beyond CI and to check whether the whole deployed service satisfies requirements. And with deployment code, we can not only automate the process of deployment, but also prepare a rollback when our tests begin to fail.