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Continuous Delivery for Java Apps: Kubernetes and Jenkins in Practice

Build a CD Pipeline Step by Step Using Kubernetes, Docker, Vagrant, Jenkins, Spring, Maven and Artifactory

Jorge Acetozi

Learn how to create a real-world Continuous Delivery pipeline for a Spring Boot app by setting up a Kubernetes cluster and running Jenkins Pipelines in a scalable fashion (dynamically allocating Jenkins slaves as Kubernetes pods) to test, build, release and deploy a new version to testing, staging and production environments using Canary Release

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About

About

About the Book

Dear Reader,

Before getting this book, please click on Read Free Sample to download 110 pages for free; this should give you an idea whether you like the book's style, structure, and contents or not. Please let me know (https://www.jorgeacetozi.com/about) if you have any trouble throughout your Continuous Delivery journey! Thank you very much!

This book will guide you through the implementation of the real-world Continuous Delivery using top-notch technologies that are in high demand by the best companies around the world. Instead of finishing this book thinking "I know what Continuous Delivery is, but I have no idea how to implement it", you will end up with your machine set up with a Kubernetes cluster running Jenkins Pipelines in a distributed and scalable fashion (each Pipeline run on a new Jenkins slave dynamically allocated as a Kubernetes pod) to test (unit, integration, acceptance, performance and smoke tests), build (with Maven), release (to Artifactory), distribute (to Docker Hub) and deploy (on Kubernetes) a Spring Boot application to testing, staging and production environments implementing the Canary Release deployment pattern to mitigate risks.

This book is intended for Java Developers, SysAdmins or anyone interested in learning how to build a continuous delivery pipeline step by step using Kubernetes, Docker, Vagrant, Jenkins, Spring, Maven and Artifactory. 

If you are a Java Developer, it's not required that you have prior knowledge with Kubernetes, Docker, Vagrant, Jenkins, etc. If you are a SysAdmin, it's not required that you know about Java, Spring, Maven, and so on. Although this is a hands-on book, all the theory needed to build the CD pipeline is provided step by step throughout the book.

I have worked as a Java Developer for many years and now I'm particularly interested in subjects such as these:

- Agile

- DevOps / Continuous Delivery

- NoSQL Databases (Cassandra, Redis, etc)

- Cloud Computing

- Containers

- Distributed Systems

- Linux / Infrastructure / Security

This is the book I wish I had found when I was learning how to implement Continuous Delivery in practice; that's why I wrote it. It will bring to you years of experience implementing Continuous Delivery in many different Java projects.

It's also worth to mention that this book is a forever edition, which means that no matter how fast the technologies used here evolve, this book will be always kept up to date and of course you will get notified and will pay nothing to take advantage of the updates.

I hope you buy this book and have a very pleasant reading. Thank you very much!

Subscribe to my website for news and updates: https://www.jorgeacetozi.com

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Author

About the Author

Jorge Acetozi

Jorge Acetozi is a senior software engineer and technical writer who spends almost his whole day having fun with things such as AWS, Kubernetes, Docker, Terraform, Ansible, Cassandra, Redis, Elasticsearch, Graylog, Sensu, Fluentd, RabbitMQ, Kafka, Java, Python, Spring, and much more! He loves deploying applications in production while thousands of users are online, monitoring the infrastructure, and acting quickly when monitoring tools decide to challenge his heart's health! Check out my newest articles:

Contents

Table of Contents

Why You Should Read This Book

About the Author

  1. Introduction

Agile

Scrum

  1. Scrum and Continuous Integration
  2. Deployed vs Released
  3. Scrum and Continuous Delivery

Extreme Programming and Continuous Delivery

  1. Automated Tests
  2. Continuous Integration

Feature Branch

Continuous Delivery

Continuous Delivery Pipeline

Continuous Delivery vs Continuous Deployment

Canary Release

A/B Tests

Feature Flags

  1. Notepad App: Automated Tests, Maven and Flyway

Pre-Requisites

The Notepad Application

  1. The Note Model
  2. The Note Controller

Unit Tests

  1. NoteTest.java

Integration Tests

  1. NoteServiceTest.java
  2. NoteControllerTest.java

Acceptance Tests

  1. Page Object: NewNotePage.java
  2. CreateNoteTest.java
  3. AcceptanceTestsConfiguration.java
  4. Distributed Acceptance Tests with Selenium-Grid

Smoke Tests

Performance Tests

  1. Gatling
  2. HomeSimulation.scala

Apache Maven

  1. Maven Snapshot vs Release
  2. The Default Lifecycle and its Phases
  3. Maven Repositories
  4. Repository Manager
  5. Maven Plugins: Surefire and Failsafe
  6. Maven Profile
  7. Running Unit Tests
  8. Running Integration Tests
  9. Running Acceptance Tests
  10. Running Smoke Tests
  11. Running Performance Tests
  12. Publish Artifacts to Artifactory with Maven
  13. Publish a Snapshot to Artifactory
  14. Publish a Release to Artifactory
  15. The release:prepare Goal
  16. The release:perform Goal

Flyway

  1. Docker

Introduction to Docker

Difference Between Container and Image

Docker Hub

  1. Create your Account
  2. Official Docker Repositories
  3. Image Tags
  4. Pulling Images From a Different Docker Registry
  5. Non-Official Docker Images
  6. Create a Repository, an Image and Push it to Docker Hub

Running Containers on Docker

  1. Running Containers as Daemons
  2. Container Clean Up
  3. Naming Containers
  4. Exposing Ports
  5. Persistent Data with Volumes
  6. Environment Variables

Docker Networking

  1. Create a Bridge Network
  2. Container Static IP Address
  3. Linking Containers

Most Used Docker Commands

  1. Images
  2. Containers
  3. Misc

Building Docker Images

  1. Dockerfile
  2. FROM
  3. ENV
  4. RUN
  5. WORKDIR
  6. COPY
  7. ADD
  8. EXPOSE
  9. ENTRYPOINT
  10. VOLUME
  11. USER
  12. Jenkins: Pipeline as Code and ChatOps

Jenkins Overview

Jenkins Concepts

  1. Job (or Project)
  2. Build
  3. Artifact
  4. Workspace
  5. Executor
  6. Plugin
  7. Node, Master, and Agent (or Slave)

ChatOps

  1. Create a Slack Workspace
  2. Integrate Slack with Jenkins
  3. Slack Notification Plugin
  4. Use Hubot to Interact with Jenkins

Jenkins Pipeline

  1. Declarative Pipeline vs Scripted Pipeline
  2. Scripted Pipeline
  3. Using Docker with Jenkins Pipelines
  4. Running Docker from Within the Jenkins Container

Scaling Jenkins with Slaves

  1. Kubernetes

Why Kubernetes?

Set up a Kubernetes Cluster using Vagrant

Hands-on Introduction to Kubernetes

Kubernetes Concepts

  1. Namespaces
  2. Pods
  3. Labels
  4. Replica Sets
  5. Services
  6. Service Discovery using DNS
  7. Service Discovery using Namespaces
  8. Volumes
  9. Handling External Configurations
  10. Config Maps
  11. Changing Logback Log Level at Runtime
  12. Secrets
  13. Using Secrets as Environment Variables
  14. Using Secrets as Files from a Pod
  15. Deployments
  16. Readiness Probes
  17. Liveness Probes
  18. Canary Release

Kubernetes Architecture

  1. Kubernetes Master Components
  2. Etcd
  3. API Server
  4. Controller Manager
  5. Scheduler

Kubernetes Node Components

  1. Service Proxy
  2. Kubelet
  3. cAdvisor

Kubernetes Add-ons

  1. Web UI (Dashboard)
  2. Monitoring Kubernetes with Heapster, InfluxDB and Grafana
  3. Web UI Overview
  4. DNS
  5. Hands-on Project: Continuous Delivery Pipeline

Configuration

  1. Kubernetes Cluster
  2. GitHub Repositories
  3. Docker Hub
  4. Artifactory
  5. MySQL
  6. Logback
  7. Jenkins
  8. Kubernetes Plugin
  9. Pipeline Project: notepad-testing
  10. Pipeline Project: notepad-acceptance-test
  11. Pipeline Project: notepad-continuous-integration
  12. Pipeline Project: notepad-release
  13. Pipeline Project: notepad-staging
  14. Pipeline Project: notepad-performance-test
  15. Pipeline Project: notepad-production
  16. Pipeline Project: notepad-canary
  17. Pipeline Project: notepad-canary-scale-replicas

Usage

  1. New User Story Development Flow
  2. Preparation: Deploying Version 1.0.0
  3. Creating the Pull Request
  4. Testing Branch add-note-subtitle
  5. Generating Release Version 1.1.0
  6. Deploying Release Version 1.1.0 to Staging
  7. Deploying Release Version 1.1.0 to Production using Canary Release

Code

  1. Testing Branch add-note-subtitle
  2. notepad-testing
  3. notepad-acceptance-test
  4. Generating Release Version 1.1.0
  5. notepad-continuous-integration
  6. notepad-release
  7. Deploying Release Version 1.1.0 to Staging
  8. notepad-staging
  9. notepad-performance-test
  10. Deploying Release Version 1.1.0 to Production using Canary Release
  11. notepad-canary
  12. notepad-canary-scale-replicas
  13. notepad-production
  14. Appendices

Notepad application.yml

Notepad pom.xml

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