1 ... Introduction ... 15

1.1 ... Culture ... 16

1.2 ... Technology ... 17

1.3 ... My Path to DevOps and to This Book ... 17

1.4 ... Target Audience ... 19

1.5 ... The Structure of the Book ... 20

1.6 ... Feedback ... 20

1.7 ... Thank You! ... 21

2 ... What Is DevOps? ... 23

2.1 ... DevOps: The Big Picture ... 23

2.2 ... Misunderstandings about DevOps ... 36

2.3 ... The DevOps Software Development Lifecycle ... 42

2.4 ... Summary ... 45

3 ... The Example Company ... 47

3.1 ... [...] ... 48

3.2 ... The Development Model ... 48

3.3 ... The Business Team: Requirements Analysis ... 49

3.4 ... The Architecture Team: Design of the Application ... 50

3.5 ... The Development Teams ... 50

3.6 ... The Quality Assurance Team ... 52

3.7 ... The Operations Team: The Ops in DevOps ... 53

3.8 ... The Infrastructure Team ... 56

3.9 ... The Security Team ... 57

3.10 ... Summary ... 58

4 ... Project Management and Planning ... 61

4.1 ... The First Steps: The Agile Mindset ... 61

4.2 ... Project Management for Everyone? ... 64

4.3 ... Summary ... 72

5 ... Collaboration when Coding ... 73

5.1 ... Typical Problems with Managing the Source Code ... 73

5.2 ... Improve the Organization of the Code ... 81

5.3 ... There Is No Way around Git ... 83

5.4 ... Code Reviews and Pair Programming ... 91

5.5 ... Inner Sourcing: Sharing Code within the Company ... 102

5.6 ... Summary ... 111

6 ... Continuous Integration and the Build Process ... 113

6.1 ... Typical Problems in the Build Process ... 113

6.2 ... Modern Build Management ... 119

6.3 ... Continuous Integration ... 122

6.4 ... The Continuous Integration Server and the Pipelines ... 126

6.5 ... Efficient Pipeline Authoring ... 132

6.6 ... Overview of Continuous Integration Servers ... 134

6.7 ... Summary ... 152

7 ... Quality Assurance ... 153

7.1 ... Typical Problems with Testing ... 153

7.2 ... Testing as Part of the DevOps Process ... 158

7.3 ... Summary ... 171

8 ... Continuous Delivery and Deployment ... 173

8.1 ... Typical Release Management Problems ... 173

8.2 ... Implementing Continuous Delivery and Deployment ... 179

8.3 ... Build Management for Deployments ... 191

8.4 ... Rollbacks, Canaries, and Feature Flags ... 198

8.5 ... Deployment Targets ... 205

8.6 ... Summary ... 219

9 ... Operating the Service ... 221

9.1 ... Typical Problems with Operating Services ... 221

9.2 ... Breaking Up the Highly Coupled Infrastructure Architecture ... 226

9.3 ... Cloud Computing ... 233

9.4 ... Stronger Collaboration between Development and Operations ... 243

9.5 ... Configuration Management: Everything as Code ... 249

9.6 ... Chaos Engineering ... 258

9.7 ... Reliability Engineering ... 262

9.8 ... Summary ... 265

10 ... From Monitoring to Observability ... 267

10.1 ... No Visibility at [...] ... 268

10.2 ... With Insight Comes Foresight ... 275

10.3 ... Tools for Monitoring, Observability, and Tracing ... 282

10.4 ... Availability ... 300

10.5 ... Summary ... 304

11 ... Security and Compliance ... 307

11.1 ... Security Disrupts the Agile Waterfall ... 308

11.2 ... DevOps with a Separate Security Team ... 310

11.3 ... DevSecOps: Building Security into DevOps ... 314

11.4 ... Tools for Higher Security ... 321

11.5 ... Supply Chain Security ... 329

11.6 ... Compliance ... 335

11.7 ... Summary ... 345

12 ... Successfully Implementing the DevOps Transformation ... 347

12.1 ... Introducing a DevOps Culture ... 347

12.2 ... Making DevOps Success Measurable with DORA Metrics ... 362

12.3 ... Value Stream Mapping ... 368

12.4 ... Summary ... 375

13 ... DevOps Platforms ... 377

13.1 ... Toolchain Complexity ... 378

13.2 ... DevOps Platforms at a Glance ... 384

13.3 ... Summary ... 387

14 ... Beyond Culture and Tools ... 389

14.1 ... The Role of AI in DevOps ... 389

14.2 ... DataOps, MLOps, and AIOps ... 397

14.3 ... DevOps as a Job ... 399

14.4 ... Summary ... 410

... Appendices ... 411

... The Author ... 411

... Index ... 413