Article tekton argocd

src/articles/tekton-argocd/index.md

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+---
+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+Let’s take a short look at the still commonly used Jenkins CI/CD Pipeline that many teams and companies consider outdated, in order to see why the use of a more modern solution is inevitable.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.