Learn DevOps

This book is your easy way to start learn famous DevOps tools and describe why you should choose it and how you can use it together. We are positive that this book helps to make the first step for engineers who think about changing their career as a lot of our students did.

Denis Zuev,

Artemii Kropachev, and

Aleksandr Varlamov

Denis Zuev,

Artemii Kropachev, and

Aleksandr Varlamov

This book is your easy way to start learn famous DevOps tools, explains why you should choose it and how you can use all the tools together. The main focus is GitLab and Jenkins. We are positive that this book helps to make the first step for engineers who think about changing their career as a lot of our students did.

Denis Zuev,

Artemii Kropachev, and

Aleksandr Varlamov

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Denis Zuev

Denis Zuev is a worldwide IT expert with 15+ yrs of experience. Some people in the industry think that he is not a human, and not without a reason. His areas of expertise are Networks, Servers, Storage, Cloud, Containers, DevOps, SDN/NFV, Automation, Programming, and WebDev, you name it. Denis is also known for his certification achievements. At the very moment, he holds following industry expert level certifications: RHCI, RHCA.VI, 6xCCIE, 4xJNCIE, CCDE, HCIE, VCIX-NV. Denis is a contractor and an instructor who works with top tech companies like Cisco, Juniper, Red Hat, ATT, etc.

Artemii Kropachev

Artemii Kropachev is a worldwide IT expert and international consultant with more than 15 years of experience. He has trained, guided and consulted hundreds of architects, engineer, developers, and IT experts around the world since 2001. Artemii’s architect-level experience covers Solutions development, Data Centers, Clouds, DevOps and automation, Middleware and SDN/NFV solutions built on top of any Red Hat or Open Source technologies. I also possess one of the highest Red Hat Certification level in the world - Red Hat Certified Architect in Infrastructure Level XX. Artemii’s life principles can be defined as “never stop learning” and “never stop knowledge sharing”. Artemii would love to share some of his experience and knowledge via this book.

Aleksandr Varlamov

Aleksandr Varlamov is an IT expert that stood at the origins of many public cloud platforms, high-load platforms, and challenging solutions. He is the mentor and lead of powerful and talented engineers, designed and implemented large-scale country-level projects, lead them to success. Aleksandr is the co-founder of technology solutions and start-ups. Evangelist of the most exciting technological solutions, author of a Russian translation of Nutanix Bible. His expertise covers Enterprise level architecture, Data Centers design, Public and Private Clouds, IaaS/PaaS/SaaS services. He appreciates and enjoys solving complex issues and challenges. Aleksandr says - every architecture solution should be stable, simple, and powerful.

Table of Contents

Table of contents 2

Intro 6

Authors 6

What is this book about? 6

Why Jenkins and GitLab 8

Structure of this book 8

About DevOps 9

Business challenges 9

Waterfall, Agile, DevOps 9

Hardware requirements 12

Software requirements 12

VirtualBox installation 13

Vagrant installation 14

Installing Git client 14

Verification 14

Lab environment overview 15

Getting started with GitLab 20

Git repository management 20

GitHub 20

GitLab 21

BitBucket 21

GitLab, GitHub, and BitBucket comparison 22

Git 22

GitLab installation 23

Connecting to GitLab 25

Git basics 33

Using Git help 34

Working with Git 35

Sharing git projects 41

Working with merge requests 50

Getting started with Jenkins 59

About Jenkins 59

Installing Jenkins 59

Pipelines overview 66

Creating Jenkins Pipeline 67

Pipelines - advanced syntax 80

Variables 80

Functions 82

Variable + Function() == LOVE 92

For loops 93

Try, catch, finally 96

Configuring Jenkins 109

Installing plugins 110

Jenkins and GitLab API 120

Why API? 120

API access tools 120

Using curl to access APIs 120

Formatting output using jq 122

Managing GitLab projects 127

List projects 127

Get single project 130

Create a project 131

Update project settings 133

Delete project 134

Other project-related activities 135

Managing GitLab users 135

Managing branches 139

Managing merge requests 141

Managing other GitLab entities 146

Using Jenkins API 147

Making GitLab and Jenkins to work together 157

Why we need it 157

What we want to achieve 157

Moving Jenkins pipelines to GitLab 157

Create a GitLab repo with pipeline script 158

Install git on Jenkins 160

Create Jenkins job 161

Triggering Jenkins job automatically 168

Configuring Jenkins build triggers 168

Using GitLab Jenkins plugin 171

Install GitLab Jenkins plugin 171

Configuring Jenkins to GitLab authentication 173

Configuring GitLab to Jenkins authentication 174

Automatic job triggering via GitLab 177

Allowing remote API calls to Jenkins 177

Configuring GitLab Webhooks 178

Update repository files 181

Updating GitLab progress from Jenkins 182

gitlabBuilds 182

gitlabCommitStatus 183

Integrating Jenkins pipelines with merge requests 186

Application 186

Configure GitLab WebHook 186

Configure GitLab merge settings 187

Configure Jenkins job parameters 188

Creating a merge request 189

More options of integration 194

Conclusions 195

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