Argo CD in practice : the GitOps way of managing cloud-native applications / Liviu Costea, Spiros Economakis, and Alexander Matyushentsev.

Format:

Book

Author/Creator:

Costea, Liviu, author.

Economakis, Spiros, author.

Matyushentsev, Alexander, author.

Language:

English

Subjects (All):

Cloud computing.

Physical Description:

1 online resource (236 pages)

Edition:

First edition.

Place of Publication:

Birmingham, England : Packt Publishing Ltd., [2022]

Summary:

Build CD pipelines following GitOps principles like declarative and immutable changes stored in version control, all continuously reconciled by Argo CD, and minimize the failure of deployments. Purchase of the print or Kindle book includes a free eBook in the PDF format. Key Features Discover how to apply GitOps principles to build real-world CD pipelines Understand Argo CD components and how they work together to reconcile cloud native applications Learn to run Argo CD in production with declarative config changes, security, observability, disaster recovery, and more Book Description GitOps follows the practices of infrastructure as code (IaC), allowing developers to use their day-to-day tools and practices such as source control and pull requests to manage apps. With this book, you'll understand how to apply GitOps bootstrap clusters in a repeatable manner, build CD pipelines for cloud-native apps running on Kubernetes, and minimize the failure of deployments. You'll start by installing Argo CD in a cluster, setting up user access using single sign-on, performing declarative configuration changes, and enabling observability and disaster recovery. Once you have a production-ready setup of Argo CD, you'll explore how CD pipelines can be built using the pull method, how that increases security, and how the reconciliation process occurs when multi-cluster scenarios are involved. Next, you'll go through the common troubleshooting scenarios, from installation to day-to-day operations, and learn how performance can be improved. Later, you'll explore the tools that can be used to parse the YAML you write for deploying apps. You can then check if it is valid for new versions of Kubernetes, verify if it has any security or compliance misconfigurations, and that it follows the best practices for cloud-native apps running on Kubernetes. By the end of this book, you'll be able to build a real-world CD pipeline using Argo CD. What you will learn Understand GitOps principles and how they relate to IaC Discover how Argo CD lays the foundation for reconciling Git state with the cluster state Run Argo CD in production with an emphasis on reliability and troubleshooting Bootstrap Kubernetes clusters with essential utilities following the GitOps approach Set up a CD pipeline and minimize the failure of deployments Explore ways to verify and validate the YAML you put together when working with Kubernetes Understand the democratization of GitOps and how the GitOps engine will enable its further adoption Who this book is for If you're a software developer, DevOps engineer, or SRE who is responsible for building CD pipelines for projects running on Kubernetes and wants to advance in your career, this book is for you. Basic knowledge of Kubernetes, Helm, or Kustomize and CD pipelines will help you to get the most out of this book.

Contents:

Cover

Title Page

Copyright and Credits

Dedicated

Foreword

Contributors

Table of Contents

Preface

Part 1: The Fundamentals of GitOps and Argo CD

Chapter 1: GitOps and Kubernetes

Technical requirements

What is GitOps?

Kubernetes and GitOps

Architecture

HTTP REST API server

Controller manager

Imperative and declarative APIs

Imperative - direct commands

Imperative - with config files

Declarative - with config files

Declarative - with config folder

Building a simple GitOps operator

IaC and GitOps

Summary

Further reading

Chapter 2: Getting Started with Argo CD

What is Argo CD?

Get familiar with Argo CD

Core concepts and vocabulary

Argo CD reconciliation

Vocabulary

Explaining architecture

Architectural overview

The core components of Argo CD

The core objects/resources of Argo CD

Running Argo CD with Helm locally

Running the first Argo CD application

Running Argo CD with Argo CD Autopilot locally

Synchronization principles

Resource hooks

Sync waves

Part 2: Argo CD as a Site Reliability Engineer

Chapter 3: Operating Argo CD

Declarative configuration

HA installation with Kustomize

Argo CD self-management

Configuration updates

Setting up an HA installation

API server

Repository server

Application controller

Redis cache

Dex server

Planning for disaster recovery

Installing the CLI

Creating the backup

Restoring on a different cluster

Enabling observability

Monitoring with Prometheus

Metrics for the operating team

Metrics for the microservices teams

Notifying the end user

Installing Argo CD Notifications

Starting a pipeline

Chapter 4: Access Control.

Technical requirements

Declarative users

Admin and local users

Service accounts

Local service accounts

Project roles and tokens

Single sign-on

SSO with Dex

SSO with Argo CD directly

Part 3: Argo CD in Production

Chapter 5: Argo CD Bootstrap K8s Cluster

Amazon EKS with Terraform

Getting familiar with Amazon EKS

Designing EKS infrastructure

Provisioning EKS with Terraform

Bootstrapping EKS with Argo CD

Preparing Argo CD Terraform

Applying Argo CD Terraform

Using the app of apps pattern

Why the app of apps pattern?

Bootstrapping utilities

Bootstrap in practice

Destroying infrastructure

Starting fresh infrastructure

App of apps disadvantages

What is ApplicationSet?

Generators

Chapter 6: Designing Argo CD Delivery Pipelines

Motivation

Simple blue/green in K8s

Deployment strategies

What is Argo Rollouts?

Why Argo Rollouts?

The architecture of Argo Rollouts

Blue-green deployment strategy

Canary deployment strategy

A real CI/CD pipeline

Setting up Argo Rollouts

Automated blue-green promotion with GitHub Actions

Automated rolling out with sync phases

Keeping secrets safe

Storing secrets safely

Argo CD and External Secrets Operator

Microservices CI/CD

Monorepo microservices

Chapter 7: Troubleshooting Argo CD

Initial setup

Addressing day-to-day issues

Restarting components

Using a specific version of Helm

Improving performance

Chapter 8: YAML and Kubernetes Manifests

Working with templating options

Helm

Kustomize.

Exploring types of validation

Validating a Kubernetes schema

Enforcing best practices for your manifests

Performing extended checks with conftest

Chapter 9: Future and Conclusion

Democratizing GitOps

What is GitOps Engine?

The GitOps agent

What is kubernetes-sigs/cli-utils?

kapply usage

Wrap up

Index

Other Books You May Enjoy.

Notes:

Description based on publisher supplied metadata and other sources.

Description based on print version record.

ISBN:

9781803232829

180323282X

OCLC:

1350078902