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GitOps is an operational model that allows developers to accelerate the delivery of cloud-native applications that run on Kubernetes.

In this course, you’ll learn the essential principles behind GitOps and how to apply the operational model to modern cloud-native systems. The course provides a detailed description of the relationship between GitOps and technologies like Docker, Kubernetes, and Helm. You’ll gain hands-on experience managing containerized workloads that run on Kubernetes using Flux. Additionally, you’ll explore how GitOps is used to execute progressive delivery strategies with Flagger.

After completing this course, you’ll be prepared to manage the operations of systems using GitOps. You’ll be able to establish and manage the GitOps operational model for systems that run on Kubernetes. You’ll also understand how to install and configure tools like Flux and Flagger that improve your systems' stability and rate of change.

GitOps—Modern Operations for Cloud Native Applications

Which is not a principle of GitOps?

Step-by-step instructions for assembling furniture

Which real-life example is the best analogy for declarative configuration?

Which real-life example is the best analogy for declarative configuration?

Which type of repository stores the entire body of source code and infrastructure code for a system in a single repository?

Which type of repository stores the entire body of source code and infrastructure code for a system in a single repository?

When GitOps is implemented correctly, which is the only tool capable of making changes to the system?

When GitOps is implemented correctly, which is the only tool capable of making changes to the system?

Drift between the desired state and the system runtime state

Drift between the desired state and the planned state

What does reconciliation correct?

Requiring all changes to the system’s desired state to be made through Git is an example of which GitOps principle?

Requiring all changes to the system’s desired state to be made through Git is an example of which GitOps principle?

A system administrator logs into a server and issues commands to update its configuration. Which GitOps principle has been violated?

A system administrator logs into a server and issues commands to update its configuration. Which GitOps principle has been violated?

Which field is not required for every Kubernetes manifest?

Which field is not required for every Kubernetes manifest?

It's a plain text configuration file that describes resources that should run on the cluster.

It refers to a logical set of pods and provides a means to route traffic to them throughout their dynamic lifecycles.

It provides a means for third-party providers to define resources that run on the Kubernetes cluster.

It registers an application that periodically launches to perform clean-up tasks.

In Kubernetes, what role does a service play?

In Kubernetes, what role does a service play?

The tools may encounter network issues when the commands are issued.

Developers may have different versions of the tool, which causes inconsistent results.

Commands manually executed by these tools cannot be reproduced.

It can lead to unstable environments with different configurations.

**(Select all that apply.)** What problems does executing commands directly against a system with tools like `kubectl` or SSH create?  

(Select all that apply.) What problems does executing commands directly against a system with tools like <code>kubectl</code> or SSH create?

Each service has a separate repository dedicated to storing its infrastructure code.

Access to the repository containing the infrastructure code can be restricted.

All source code is stored in a single repository.

All changes to the system can be viewed in the repository's commit log.

Which is a benefit of using polyrepos for GitOps?

Which is a benefit of using polyrepos for GitOps?

Developers only need to know how to perform a commit to introduce system changes.

It simplifies the branching strategy in a repository.

Developers must learn elaborate workflows to introduce system changes, reducing the possibility they will corrupt the system.

Developers are provided the option to bypass the automated agents and apply their own changes directly to the system.

Which is a benefit of only allowing automated agents to apply system changes committed to the desired state?

Which is a benefit of only allowing automated agents to apply system changes committed to the desired state?

They store a copy of the desired state locally and adjust the system when drift occurs.

They observe both the desired state stored in Git and the runtime state of the system, allowing them to discover and correct drift.

They automatically apply all new changes committed to Git to the system.

They monitor user traffic destined for the system and observe unexpected responses.

What makes it possible for automated agents to reconcile drift within a system?

What makes it possible for automated agents to reconcile drift within a system?

What is used by Argo CD and Flux to configure GitOps on a Kubernetes cluster?

What is used by Argo CD and Flux to configure GitOps on a Kubernetes cluster?

Chapter Quiz

Chapter Quiz

Quiz yourself on the concepts of GitOps principles learned in this chapter.

Introduction to GitOps

GitOps Principles

Architecting GitOps-based Systems

Project I: Hands-on GitOps

GitOps in Practice

Project II: Use GitOps with Flux

Continuous Delivery with GitOps

Using Flux with Helm

Advanced Deployment Models with Flagger

Wrapping up

Appendix

Quiz Yourself: GitOps Principles