Introduction to CI/CD

CI/CD stands for continuous integration and continuous delivery. It is a combination of practices that facilitate continuous integration, continuous delivery, and continuous deployment. Part of its scope is the automation of building, testing, and deploying applications.

For example, let’s take our Lambda application. It is a complex environment consisting of two Lambda-based applications and three different AWS services.

For our use case, we assume that we have a team that follows trunk-based development, a practice that facilitates CI. Our team will contribute small commits to the trunk-main branch every time. This can be done with short-lived feature branches. Pull requests will be raised in order to merge changes from those branches to the trunk-master branch. A pull request should be reviewed by the development team, in parallel, a CI/CD automated process that builds and tests the newly introduced code should take place and be part of the merge...