DevOps Evolution, 2000–2025: 2.1 Introduction: The Constraint That Moved 15 2.2 A Note on Periodization 16 2.3 Phase 1 — 2001–2005: Agile Pressure on a Sequential Model 16 2.4 Phase 2 — 2005–2010: Integration, Configuration, and the Arrival of Cloud 17 2.5 Phase 3 — 2010–2015: The Mo

Learning Objectives

By the end of this chapter, you will be able to:

1. Explain why DevOps emerged when it did, tracing its causes to the specific constraints of the pre-2000 operating model described in Chapter 1.
2. Describe the five phases of DevOps evolution between 2000 and 2025 and identify the dominant constraint that each phase addressed.
3. Distinguish the cultural claims of DevOps from its technical practices and explain why organizations that adopt only the latter typically fail to realize the benefits.
4. Analyze the anatomy of a governed enterprise delivery pipeline, including where automated controls replace manual ones and where they cannot.
5. Evaluate infrastructure as code, containerization, GitOps, and progressive delivery in terms of the specific risk each reduces and the new complexity each introduces.
6. Apply DORA and reliability metrics appropriately and recognize the ways in which each can be gamed or misread.
7. Assess the role of AI assistance in delivery and operations, distinguishing tasks where automation is safe from those requiring human authority.