Infrastructure as Code, Patterns and Practices

9 Making changes

This chapter covers

• Determining when to use patterns like blue-green deployments to update infrastructure
• Establishing immutability to create environments across multiple regions with IaC
• Determining change strategies for updating stateful infrastructure

In previous chapters, we started with helpful practices and patterns for modularizing, decoupling, testing, and deploying infrastructure changes. However, you also need to manage changes to infrastructure with infrastructure as code techniques. In this chapter, you’ll learn how to change IaC with strategies that apply immutability to minimize the impact of potential failure.

Let’s return to Datacenter for Veggies and its struggles to modularize IaC from chapter 5. The company ...