Chapter 7: Continuous Deployment with Jenkins

In order to reliably use Docker containers in production, you need a process that will consistently build, test, and deploy your software. A team building very small applications might be satisfied with running tests and deployment scripts manually. However, discipline often breaks down, and people step on each other's toes. This often results in broken builds and tests that are not run before or after a production deployment. The aftermath is often downtime and unhappy customers. In order to make sure that we can build, test, and deploy software reliably, we can use continuous integration software. This type of software can reliably build, test, and deploy revisions in a disciplined and traceable way. A well-run modern project can even use this software to achieve continuous deployment, where even the smallest changes to the software can be quickly promoted to either a test or production environment.

In this chapter, we show how...