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 ... nicely-dressed.com ... 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 nicely-dressed.com ... 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
