Argo CD Bootstrap for K3s Cluster

This repository bootstraps a GitOps-based deployment for a K3s cluster using Argo CD. It includes:

• Ansible playbook to install and configure Argo CD.
• GitOps folder structure to manage cluster applications declaratively.
• Initial setup of core infrastructure apps like NGINX Ingress Controller and Sealed Secrets.

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📁 Repository Structure

.
├── ansible
│   ├── ansible.cfg                  # Local Ansible config
│   ├── playbooks
│   │   └── setup-argocd.yml         # Entry point to install Argo CD
│   └── roles
│       └── argocd
│           └── tasks
│               └── main.yml         # Tasks to install Argo CD via kubectl
├── bootstrap
│   └── root-application.yaml        # Argo CD root Application to manage everything
└── clusters
    └── k3s                          # Folder for the 'k3s' cluster
        └── infra
            ├── argocd
            │   ├── application.yaml
            │   └── values.yaml      # Self managed ArgoCD
            └── sealed-secrets
                ├── application.yaml
                └── values.yaml      # Sealed Secrets controller via Helm

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🚀 Getting Started

1. Provision your cluster (separate Terraform repo)
   • Set up an OCI VM and install K3s (already handled separately).
2. Install Argo CD
   • Run the Ansible playbook:

   ansible-playbook -i <inventory> ansible/playbooks/setup-argocd.yml
   

3. Bootstrap GitOps
   • Once Argo CD is running, it will automatically sync bootstrap/root-application.yaml.
   • This sets up core infrastructure via Helm-based Argo CD Applications.

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📝 TODO

• Add ExternalDNS + DuckDNS for dynamic subdomain mapping.
• Add Dex for SSO login to Argo CD.
• Configure Argo CD Ingress with HTTPS via Let’s Encrypt.
• Add app layer (e.g., whoami, jobwinner).
• Enable RBAC policies if needed for multi-user environments.

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🧠 Notes

• This repo assumes a single cluster named k3s.
• All cluster resources (infra/apps) are defined declaratively under clusters/k3s.
• Secrets should be encrypted using Sealed Secrets.

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🔗 References

• Argo CD Official Docs
• Bitnami Sealed Secrets