Argo CD for the Absolute Beginners - Hands-On DevOps

Learn how GitOps uses git as the single source of truth to automate Kubernetes deployments with Argo CD, eliminating configuration drift and enabling continuous reconciliation.

Explore Argo CD, a declarative GitOps delivery tool for Kubernetes. It synchronizes git-based desired state with live cluster state, monitors drift, and provides automated reconciliation.

Argo CD automates Kubernetes deployments with GitOps and supports multi-cluster management, configuration tools, single sign-on. It offers drift detection, rollback, health status analysis, web UI and CLI, audits, and observability.

Explore the Argo CD documentation to learn its purpose, prerequisites, and core concepts like application target and state sync.

Understand Argo CD installation options—core vs multi-tenant with ha and non-ha modes—and install methods (install YAML vs namespace install YAML) and prerequisites.

Install Argo CD on a Kubernetes cluster on AWS, using multi-tenant production mode with HA or non-HA, deploy via YAML or namespace install, then access the UI.

Demonstrates a step-by-step Argo CD UI walkthrough: locate the initial admin password, log in to the 2.13.2 dashboard, and explore settings, projects, and declarative API concepts.

Explore how Argo CD operates as a Kubernetes controller enforcing GitOps, reconciling live cluster state with the git-defined desired state across four layers: ui, application, core, infra.

Explore Argo CD applications and core concepts, including deployment modes via ui, cli, and manifest, with demos of application deployment, auto namespaces, sync options, prune sync, and non cascade deletion.

Argo CD supports the UI, CLI, and YAML manifests to create and manage applications, enabling easy monitoring, automation scripts, and version-controlled configurations across clusters and namespaces.

Deploy a sample web app with Argo CD end to end, from cloning a GitHub repository to syncing deployments on a Kubernetes cluster, including diffing, manual sync, and updating replicas.

Argo CD auto creates the namespace when namespace manifest is removed, deploying deployment and service. Deleting the application removes resources but leaves the auto-created namespace, which must be deleted manually.

Explore Argo CD sync options, including skip schema validation, autocreate namespace, prune last, apply out of sync, and respect ignore differences, plus server side apply and prune propagation policies.

Demonstrates how to use Argo CD prune during sync to keep Git and cluster in sync by deleting resources (namespace, deployment, service) when removed from Git.

Learn how to delete an Argo CD application resource in non cascading (orphan) mode, keeping cluster resources like namespace, service, and deployments intact, by selecting the non cascading propagation policy.

Explore Argo CD projects to organize applications and manage deployments through demos. Apply source and destination restrictions, resource restrictions, and rbac with oidc or jwt to control access.

Explore how to view, configure, and create Argo CD projects, including the default project's broad permissions, roles, and sync windows, and begin deploying apps with a new Think Next Project.

Learn how to deploy Argo CD apps in a custom project, troubleshoot repository and destination errors, configure namespace-scoped permissions, and achieve successful syncs of deployments and services.

Explore the automatic sync policy in Argo CD, including pruning resources, self-heal, and configuring the reconciliation loop time to keep the GitHub repository and live cluster in sync.

Demonstrates deploying an app with automatic sync policy, enabling prune resources and self-heal, linking a Git repo and manifest path to a local cluster; changes auto-sync and keep resources healthy.

Demonstrates pruning resources with automatic sync in Argo CD to delete removed manifests from the source of truth and align the live cluster with the desired state.

Enable the self-heal option to automatically recreate deleted resources and keep live state in sync with the desired state via automatic sync, reducing downtime.

Learn how to configure automatic sync reconciliation time in Argo CD by adjusting the timeout in the config map and restarting components to enable a 60-second resync.

Understand upgrades and rollbacks in Argo CD, with manual and automatic sinks, using Git as the source of truth; perform rollbacks by switching to manual sync and syncing after reverting.

Demonstrates upgrading an application with GitOps using Argo CD, using manual and automated sync, observing health, and performing a rollback through history and commit IDs.