Beyond traditional Jenkins-based CI/CD, this course also covers GitOps deployments using ArgoCD. You will design and implement CI/CD and GitOps deployment strategies for dev, staging, and production environments by combining Jenkins and ArgoCD. You will work with both push-based Jenkins and pull-based ArgoCD, directly comparing the two approaches on the same cluster to build a practical hybrid deployment pipeline. You will practice essential deployment techniques for operations, including Canary, Blue-Green, RBAC, approval procedures, incident response, and automatic rollback.
301 learners
Level Basic
Course period Unlimited
A Decision-Making Framework for Designing Deployment Strategies Tailored to Each Environment
My own fully functional GitOps infrastructure setup
The ability to answer deployment-related interview and practical questions with sound reasoning.
"It deploys, but I'm not sure if this is the right way."
Have you ever set up CI/CD with Jenkins but felt unsure whether your current approach was the right one, or studied ArgoCD and GitOps but felt overwhelmed about how to apply them in a real-world project?
This course goes beyond simply learning how to use Jenkins and ArgoCD separately.
This course covers how to determine which deployment method to choose based on the characteristics of the development (dev), staging, and production environments, and how to design a functional CI/CD·GitOps pipeline by combining Jenkins and ArgoCD.
By the end of the course, your computer will contain not just a simple hands-on example,
a hybrid GitOps pipeline with dev and staging deployments based on Jenkins Push, and production deployment based on ArgoCD Pull is completed in a fully functional form.
Hybrid pipeline
In most CI/CD courses, you only use Jenkins when learning Jenkins, and only use ArgoCD when taking an ArgoCD course.
However, in practice, it is more common to combine multiple approaches depending on the environment and the organization’s characteristics rather than use just one tool.
In this course, we will directly implement the following hybrid structure.
Developer → Git → Jenkins → dev / staging
Developer → GitOps Repository → ArgoCD → production
In other words, we connect two different strategies into a single system: fast push-based deployments in dev and staging, and pull-based GitOps deployments in production, where Git serves as the source of truth.
No separate cloud environment such as AWS, Azure, or GCP is required.
In your personal computer’s Docker Desktop environment
Kubernetes/
Jenkins/
ArgoCD/
Argo Rollouts
You will configure the environment yourself. It is designed to let you experience the entire CI/CD and GitOps workflow without additional cloud costs.
Instead of using a new example for each section, we use a single Spring Boot-based product-service throughout the entire course.
It starts with a simple Spring Boot API, then progressively evolves through Docker Image → Kubernetes Deployment → Kustomize → Jenkins Pipeline → ArgoCD → GitOps → Canary Deployment → automatic rollback.
Therefore, there is less burden of having to understand the example project again each time a new technology emerges.
In a real-world CI/CD environment, simply being able to deploy is not enough.
Who can deploy to the development environment,
who can make changes to the production environment,
It is also important to determine who should approve production deployments.
For these tasks, this course examines together the Jenkins Role Strategy/ Jenkins Credentials/ Approval Gate/ ArgoCD RBAC/ AppProject.
Jenkins Role Strategy/
Jenkins Credentials/
Approval Gate/
ArgoCD RBAC/
AppProject
We’ll also explore this. You’ll learn how to design CI/CD as part of an operations system, rather than merely as an automation tool.
Backend developers
Recommended for those who can develop applications with Spring Boot but have been using deployment pipelines created by others.
Infrastructure and DevOps professionals
Recommended for those who need to establish a CI/CD environment for a new project or transition an existing Jenkins-centered deployment environment to a GitOps approach.
IT operations professionals
You will also learn about the RBAC structures and deployment history management approaches of Jenkins and ArgoCD, enabling you to understand the fundamental architecture needed to coordinate CI/CD policies.
You can design deployment strategies tailored to each environment—dev, staging, and production—based on sound reasoning.
You will be able to work with ArgoCD at a practical level, from Applications to App of Apps, ApplicationSet, and RBAC.
You will directly implement canary deployments and automatic rollbacks, gaining experience responding to real-world incidents.
You can independently establish and apply a basic deployment strategy, approval process, and rollback plan for your own project.
Build a Jenkins-based CI/CD pipeline yourself.
Go beyond simply running Jenkins Jobs and build a real CI/CD Pipeline. You will understand how Jenkins operates as a CI/CD orchestrator rather than just a “build server.”
Understand how ArgoCD and GitOps work.
The most important question in GitOps is "Why should Git be the source of truth for the production environment?" . This is structured so that you can design the architecture of real projects, going beyond simply clicking the Sync button in the ArgoCD interface.
Designing a Jenkins + ArgoCD Hybrid GitOps Approach
Instead of using the same deployment method for every environment, we apply the dev → Jenkins Push, staging → Jenkins Push, production → ArgoCD Pull approach.
Experience Canary and Blue-Green deployments, including automatic rollbacks.
Using Argo Rollouts, practice switching to Canary Deployment, Rollback, and Blue-Green Deployment.
With the belief that “Knowledge in your head is not knowledge,” I strive to package the limited experience and knowledge I have and explain it in a way that is easier to understand. I believe this will be an easier-to-understand course for those who are interested in the fields of LLMs and AI based on Java and Spring Framework technologies.
Based on 26 years of experience in teaching, consulting, and development, I conduct lectures with explanations designed to help participants understand practical experience and know-how.
My current work as an architect and engineer: I directly design and develop GraphRAG-based knowledge graph systems and enterprise AI platforms.
2023–Present: CEO of NJ1 Company Co., Ltd.
Former) Adjunct Professor, Department of Information Security, Graduate School of International Information, Dongguk University
Former) JP Morgan Chase AMJ Tech consultant (Japan)
Formerly) Samsung SDS CMS Business Division, Lead Engineer
Execution of AI/LLM projects in the financial sector: By repeatedly carrying out AI- and LLM-related projects in the financial sector, I gained practical experience designing and implementing LLM services in the financial domain, where reliability and stability are especially important.
Years of MSA, cloud-native, and AI instruction: I teach courses in Spring Boot, Spring Cloud, MSA, Kafka, Blockchain, Machine Learning, Deep Learning, and DevOps.
Corporate training and curriculum design: I have designed curricula and personally taught numerous corporate and bootcamp courses, including cloud, MSA, security, and AI programs. My principle is to go beyond theory and incorporate hands-on project experience into my lectures.
The course explains things based on MacOS (Sequoia 15.7.4), but those using Windows OS can also follow along easily.
In this course, hands-on exercises are conducted using Visual Studio Code based on OpenJDK 17+.
Gradle is used as the build tool.
Jenkins and ArgoCD, which are required for the hands-on exercises, will be installed during the course.
Slide materials provided for each section (PDF files)
An executable Spring Boot example project
Kubernetes manifests provided (GitHub repository provided)
Not required, but having the following two things will make things much easier.
Experience creating a simple REST API with Spring Boot (not required; used as a deployment target rather than for the code itself)
Basic Git usage (clone, commit, push) and familiarity with using the terminal
It is sufficient if you have only heard of very basic Docker and Kubernetes terms, such as containers and Pods.
Since we’ll cover the concepts and installations needed for Sections 1–2 together from the beginning, the course is designed so that even those who have never used Kubernetes can follow along. However, if you’re completely new to Kubernetes, we recommend briefly reviewing the basic concepts of container orchestration beforehand.
Who is this course right for?
"I can create a Docker image, but everything after Kubernetes is difficult." says a backend developer
"Infrastructure and DevOps professionals considering how to gradually transition from their existing CI/CD environment to GitOps"
An IT operations professional who needs to understand "deployment approvals/operational permissions/incident recovery/change history"
Need to know before starting?
Basic Git Usage
Basic experience using the terminal
Basic knowledge of Docker containers
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I am an IT engineer. There was a time when I wondered which word I should choose for the occupation field: "office worker?", "developer?", or "instructor?" Then I came to think that “IT engineer” was the job title that suited me best, so I have continued to write "IT engineer" in the occupation field.
A profession represents the work you do, and I believe that work should be enjoyable and useful. Although no one can live by doing exactly the work they want, I am someone who likes the work I do and wants to do it well. Having worked as a developer, instructor, and consultant, I am constantly struggling to keep up with newly released and ever-changing IT technologies. Even so, I am one of those people who wants to encounter, share, and use them even a little earlier than others.
The field I have recently become interested in is online education consulting. The technologies I am interested in include Cloud Native Architecture, Blockchain, Machine Learning, Kafka, and Kuberbetes. I actually teach courses on these technologies and apply them in my work as well. However, since they are such vast topics, I am still continuously studying them.
They say that what you keep in your head is not true knowledge. I intend to share my knowledge and experience in various ways. And I will continue to be an IT engineer who takes on new challenges in new fields and with new technologies.
Current) CEO of NJ One Company
Current) Adjunct Professor, Department of Information Security, Graduate School of International Information, Dongguk University
Former) JP Morgan Chase AMJ Tech consultant (Japan)
Former) Samsung SDS CMS Business Division Lead Engineer
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