diff --git a/src/articles/tekton-argocd/images/cover.png b/src/articles/tekton-argocd/images/cover.png new file mode 100644 index 00000000..e2e129c5 Binary files /dev/null and b/src/articles/tekton-argocd/images/cover.png differ diff --git a/src/articles/tekton-argocd/index.md b/src/articles/tekton-argocd/index.md new file mode 100644 index 00000000..6aac5faa --- /dev/null +++ b/src/articles/tekton-argocd/index.md @@ -0,0 +1,117 @@ +--- +title: Building a Cloud-Native CI/CD Pipeline with Tekton and ArgoCD on OpenShift +description: + This article provides a technical overview of building a cloud-native CI/CD pipeline on Red Hat OpenShift using Tekton and Argo CD. + It outlines the architectural shift from traditional automation servers like Jenkins to declarative, Kubernetes-native pipelines. + The article explains how Tekton handles continuous integration through containerized build and test stages, while Argo CD manages continuous delivery via GitOps-based synchronization, ensuring scalable, secure, and consistent application deployments across clusters. +released: '2026-01-04T09:12:35.781Z' +cover: images/cover.png +author: Livia Erdelyi +tags: + - Tekton + - ArgoCD + - CI / CD + - continuous integration + - continuous deployment +shortDescription: >- + Explores how Tekton and Argo CD enable a fully cloud-native CI/CD pipeline on OpenShift, replacing traditional Jenkins workflows with scalable, declarative, and GitOps-driven automation. +--- + +Delivering software quickly, safely, and consistently has become a defining challenge for modern development teams. +As applications evolve into distributed, containerized services, continuous integration and continuous delivery (CI/CD) pipelines must also evolve — becoming more cloud-native, scalable, and declarative. + +To overcome these challenges, modern tools are essential. If the topic is CI / CD, the most commonly used tools are GitHub Actions, GitLab CI / CD, Jenkins, CircleCI, Tekton & ArgoCD. + +Let’s take a short look at the still commonly used Jenkins CI/CD Pipeline that many teams and companies consider outdated, in order to see why the use of a more modern solution is inevitable. + +#### **What is Jenkins?** +Jenkins is one of the oldest and most widely used CI/CD automation servers. +Originally designed for on-premise setups, Jenkins has powered automation for countless organizations over the last decade. +It’s flexible, plugin-rich, and language-agnostic. + +#### **How does Jenkins work?** + +Jenkins operates on a master-agent architecture (though newer versions call these controller and agents). +The controller manages the configuration, UI, and coordination of jobs. +The agents (or nodes) handle the execution of build tasks. +This distributed design makes Jenkins highly scalable — perfect for large teams running parallel builds across multiple environments. + +#### **Here’s how a typical Jenkins Workflow looks like** + +Here’s a typical CI/CD flow automated through Jenkins: + +1. Code Commit → Developer pushes code to GitHub/GitLab. +2. Trigger Build → Jenkins automatically detects changes via a webhook. +3. Build Stage → Code is compiled, dependencies are resolved. +4. Test Stage → Unit and integration tests run automatically. +5. Deploy Stage → The application is deployed to a test or production server. +6. Notification → Jenkins reports build status to Slack, email, or dashboards. + +### **The Modern CI/CD Challenge** + +Traditional CI/CD systems, like Jenkins or GitLab CI, have served development teams well for years. +However, as organizations move toward Kubernetes and microservice architectures, these systems often struggle to keep up with the dynamic, declarative, and multi-environment workflows that modern cloud-native platforms demand. + +OpenShift addresses these challenges by offering a Kubernetes-based platform built for enterprise workloads — and by integrating powerful open-source projects such as Tekton (for CI) and ArgoCD (for CD). + +Let’s explore how two open-source technologies — Tekton and ArgoCD — can power a fully cloud-native CI/CD pipeline on Red Hat OpenShift. +Together, they create a robust, Kubernetes-native delivery workflow that automates everything from code build to deployment, while maintaining visibility, consistency, and control. + +Let’s break down what each of these tools brings to the table, and how they work together to streamline software delivery. + +#### **What is Tekton?** + +Tekton is a powerful and flexible open-source framework for creating CI/CD systems, allowing developers to build, test, and deploy across cloud providers and on-premise systems. +It provides a set of flexible, reusable building blocks that run directly on your OpenShift cluster — no external agents or servers required. + +#### **Here’s how a typical workflow looks on OpenShift** + +1. A developer pushes code to GitHub. +2. A Tekton Trigger detects the push and runs the CI pipeline. +3. Tekton builds the image, runs tests, and pushes the image to an OpenShift-integrated registry (like Quay.io or the internal registry). +4. Tekton then updates the deployment manifests (e.g., updates the image tag) in the Git repository used by ArgoCD. +5. ArgoCD detects the Git change and automatically syncs the application to OpenShift. + +This pattern embodies GitOps principles — Git becomes the single source of truth for both infrastructure and application state. + +#### **Tekton + ArgoCD: A Cloud-Native CI/CD Duo** + +By combining Tekton and ArgoCD, we can create a clean separation of concerns: + +Tekton handles the CI process: building, testing, and pushing container images. + +ArgoCD handles the CD process: deploying applications based on the manifests in Git. + +Let’s look into how they can split tasks between each other: +Tekton is focused on building artifacts (Docker images, etc.). +It is Push-based - triggers pipelines via Git push or webhook, and is usually part of the CI. + +ArgoCD is focused on deploying artifacts to Kubernetes. +It is Pull-based - watches Git and syncs cluster state and handles CD. + +#### **How do they work together?** + +When code is committed to a Git repo, Tekton triggers pipeline runs to build and test the application, producing container images and artifacts. + +These artifacts are pushed to a container registry, and the Git repo is updated with the new image tags or Kubernetes manifests reflecting these changes. + +Argo CD continuously monitors the Git repo for updates, and upon detecting changes, it synchronizes the Kubernetes cluster state to the Git-desired state by deploying or updating applications automatically. + +This GitOps workflow ensures that deployments are consistent, auditable, and can be rolled back automatically in case of errors. + +Both tools support multi-cluster deployments, allowing centralized pipeline orchestration and GitOps-driven delivery across many OpenShift clusters. + +### **Benefits of Using Tekton and Argo CD on OpenShift** +Kubernetes-native: Both tools are designed to run natively in Kubernetes environments like OpenShift, leveraging declarative manifests, CRDs, and operator-based deployment. + +Scalability: Pipelines can be parallelized and scaled on demand using Tekton, while Argo CD manages deployments across multiple clusters efficiently. + +Security and Compliance: OpenShift Pipelines adds hardened security features to Tekton, and role-based access control (RBAC) integration is available for managing user permissions in Argo CD. + +Visibility and Monitoring: OpenShift and Argo CD provide monitoring dashboards for pipeline runs and deployment status, helping teams get real-time feedback on their CI/CD workflow. + +GitOps Automation: Argo CD’s GitOps approach promotes infrastructure as code and operational consistency, reducing manual intervention and deployment errors. + +### **Final Thoughts** +Hopefully, this article provides some guidance for anyone looking to set up a CI/CD pipeline. +While Jenkins is a classic choice, Tekton’s modern, cloud-native approach makes building, scaling, and managing pipelines more straightforward and efficient. \ No newline at end of file