Chapter 9. Managing Environments
Most organizations start with a single environment while building their infrastructures. However, as the complexity grows, it is imperative that we have a workflow that involves writing code and testing it in development environments, followed by an intensive QA cycle to make sure that the code is tested for stability in the staging, or preproduction, environment before we finally release it to production. In order to simulate a real-world behavior, these environments have to run identical stacks of applications, but most likely at different scales. For example, staging will be a small-scale replica of production with fewer servers, and most commonly, development environments would run on individual workstations in virtualized environments. Even though all these environments run an identical application stack, they have to be isolated from each other and must have environment-specific configurations, explained as follows:
- The applications in the...
