📘Loki Stack GitOps on Minikube

🚀 Loki Stack GitOps Deployment (Minikube + Argo CD)

This repo demonstrates a complete GitOps setup to deploy the Loki logging stack (Loki + Promtail + Grafana + Prometheus) using Argo CD on Minikube.

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🗂️ Repo Structure

loki-argo/
├── charts/loki-stack/          # Vendored Helm chart
├── values.yaml                 # Custom values for Loki stack
├── loki-stack-app.yaml         # Argo CD Application for Loki stack
├── nginx/                      # Sample additional app (NGINX)
│     └── deployment.yaml
├── nginx-app.yaml              # Argo CD Application for NGINX

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✅ What’s Deployed

Component	Description
Loki	Log aggregation and storage
Promtail	Log collector (sidecar/DaemonSet)
Grafana	Dashboards for logs + metrics
Prometheus	Metrics collection
Argo CD	GitOps controller (pre-installed)
NGINX (demo)	Sample GitOps-managed deployment

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🚀 Prerequisites

• Minikube
• kubectl
• Helm
• Argo CD installed in cluster
• Git clone of this repo

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🛠️ Setup Instructions

1. Start Minikube

minikube start --cpus 4 --memory 6g

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2. Install Argo CD

kubectl create namespace argocd

kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml

# Expose Argo CD UI
kubectl port-forward svc/argocd-server -n argocd 8080:443

Login with:

# Get admin password
kubectl -n argocd get secret argocd-initial-admin-secret \
  -o jsonpath="{.data.password}" | base64 -d

Access: https://localhost:8080

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3. Deploy Loki Stack using Argo CD

kubectl apply -f loki-stack-app.yaml

Argo CD will:

• Fetch the vendored Helm chart
• Apply your values.yaml
• Sync the full Loki stack to the observability namespace

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4. (Optional) Deploy NGINX with GitOps

kubectl apply -f nginx-app.yaml

This demonstrates how to manage any app (not just Helm charts) via GitOps.

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5. Verify Everything

kubectl get all -n observability

You should see:

• loki, promtail, grafana, prometheus, and nginx running
• Grafana exposed (optional: use port-forward or ingress)

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🔐 Default Access

• Grafana:

  • Username: admin
  • Password: newadmin123 (set in values)

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📦 Customization

• Edit values.yaml to change storage backends, scrape configs, dashboards, etc.
• Add new apps (like nginx/) and corresponding Argo CD Application files.
• Use ApplicationSet for multi-env or multi-cluster deployments.

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🧠 GitOps Benefits

• 🔄 All config in Git
• ♻️ Auto sync via Argo CD
• 📦 Helm chart versioning
• 🔍 Audit-friendly

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📸 Screenshot (Loki Stack in Argo CD)

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📜 License

MIT — free to use, modify, and share.

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🙌 Credits

• Grafana Loki
• Argo CD
• Prometheus
• Minikube

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