Best of ArgoCD — 2025

  1. 1
    Article
    Avatar of itnextITNEXT·1y

    How to Build a Multi-Tenancy Internal Developer Platform with GitOps and vCluster

    This post explores building a multi-tenant internal developer platform (IDP) using a self-service approach with Kubernetes, GitOps, and vCluster. It clarifies the roles of platform engineering and managed infrastructure teams, explains the layers of an IDP, and provides a hands-on guide for setting up and managing the platform. Additionally, it promotes an upcoming webinar showcasing a technical demo and offering insights into multi-tenant Kubernetes environments.

  2. 2
    Article
    Avatar of freecodecampfreeCodeCamp·51w

    From Commit to Production: Hands-On GitOps Promotion with GitHub Actions, Argo CD, Helm, and Kargo

    A comprehensive guide to building a production-ready CI/CD pipeline using GitOps principles with GitHub Actions, ArgoCD, Helm, and Kargo. The tutorial demonstrates how to structure repositories for microservices, implement automated environment promotions, and manage multi-stage deployments using the Craftista e-commerce application as a real-world example. It covers semantic versioning, polyrepo architecture, and automated promotion workflows from development through production environments.

  3. 3
    Article
    Avatar of devtronDevtron·1y

    Getting Started with Argo CD: A Beginner’s Guide

    Argo CD is a GitOps-based continuous deployment tool for Kubernetes that ensures clusters stay in sync with configurations defined in Git repositories. It automates application deployment, enhances security through a pull-based model, and manages both single and multi-cluster environments. Key features include automatic deployments, multi-cluster support, and integration with CI/CD platforms. Common challenges include complexity in multi-cluster management, lack of automated rollbacks, and increased tool sprawl.

  4. 4
    Article
    Avatar of mondaymonday Engineering·26w

    ArgoCD diffs at scale

    Monday.com built a custom diffing tool to review GitOps changes at scale. The solution renders Helm manifests on-the-fly during pull requests, comparing target and head branches to generate diff artifacts displayed in a dedicated UI. This approach addresses challenges with hierarchical configuration overlays—large blast radius, difficult-to-understand merged results, and onboarding complexity—without migrating to rendered manifests. The tool uses real Kubernetes cluster capabilities, supports local overrides for testing, and provides grouping/filtering features for managing hundreds of resource changes across multiple clusters and environments.

  5. 5
    Article
    Avatar of sitepointSitePoint·48w

    ArgoCD: A Practical Guide to GitOps on Kubernetes — SitePoint

    ArgoCD is a declarative GitOps continuous delivery tool for Kubernetes that uses Git repositories as the single source of truth for application deployments. Unlike traditional push-based CI/CD systems, ArgoCD runs inside the cluster and pulls changes from Git, making it more secure by not exposing cluster credentials. The tool consists of three main components: API Server, Repository Server, and Application Controller, which work together to monitor applications and maintain desired state. Major enterprises like LoveHolidays and CVTE have successfully adopted ArgoCD to handle massive-scale deployments, with LoveHolidays managing over 1500 production deployments monthly. The guide includes a practical demonstration showing how to set up ArgoCD on a minikube cluster and configure automatic syncing of application changes from Git repositories.

  6. 6
    Article
    Avatar of do_communityDigitalOcean Community·32w

    Manage Multi-Cluster Deployments with ArgoCD

    ArgoCD ApplicationSets automate Kubernetes deployments across multiple clusters using a declarative GitOps approach. The guide demonstrates how to set up ArgoCD, configure ApplicationSets with generators for multi-cluster management, and reduce deployment times by 83% while ensuring consistency. It covers installation, cluster registration, ApplicationSet configuration with parameter substitution, troubleshooting common issues, and explains how generators create parameter sets that render into individual ArgoCD Applications for each target cluster.

  7. 7
    Article
    Avatar of rhdevRed Hat Developer·47w

    How to configure and manage Argo CD instances

    This guide demonstrates how to configure and manage tenant-level Argo CD instances in a multi-cluster environment. It covers creating namespaces, service accounts, and secrets for tenant isolation, setting up RBAC permissions, and establishing secure connections between hub and spoke clusters. The article explains application deployment workflows using Helm umbrella charts, including the relationship between base charts and configuration charts for managing multi-component applications across different OpenShift clusters.

  8. 8
    Article
    Avatar of itnextITNEXT·50w

    How We Load Test Argo CD at Scale: 1,000 vClusters with GitOps on Kubernetes

    A comprehensive load testing experiment demonstrates how Argo CD performs at scale with up to 1,000 virtual clusters using vCluster technology. The test reveals practical scaling limits: Argo CD handles around 500 applications and 50-60 clusters before requiring significant tuning. Key findings include memory pressure on Application Controllers around 100 vClusters, the need for resource limit adjustments, and architectural considerations for multi-tenant GitOps platforms. The experiment used over €20,000 worth of infrastructure on STACKIT and provides detailed insights into component-specific bottlenecks, optimization strategies, and alternative approaches like Kargo for enterprise-scale deployments.

  9. 9
    Article
    Avatar of spaceliftSpacelift·1y

    Argo CD CLI Commands Cheat Sheet & Best Practices

    Argo CD is a GitOps continuous delivery tool for Kubernetes that automatically syncs your cluster with your Git repository. The CLI (command-line interface) allows you to manage applications, synchronize repositories, and perform various operations directly from the terminal. This cheat sheet provides useful commands and best practices to streamline your workflow, including installation instructions for macOS, Linux, and Windows, as well as tips for using the `argocd` command to manage apps, clusters, projects, and repositories effectively. Avoid putting credentials in plain text and ensure compatibility between CLI and server versions for smooth operations.

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