🎲 kuby

A simple experiment with Kubernetes, ArgoCD, and the Grafana stack.

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📋 Prerequisites

Before you start, ensure you have:

• ✅ a Kubernetes cluster
• ✅ kubectl CLI installed
• ✅ argocd CLI installed

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📦 Instructions

1️⃣ Install Argo CD

Run the following commands to set up Argo CD:

kubectl create namespace argocd

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

argocd admin initial-password -n argocd

Create application referencing your repository.

2️⃣ Access All Services

Use the following commands to port-forward services for local access:

kubectl -n argocd port-forward svc/argocd-server 8081:443 &
kubectl -n monitoring port-forward svc/dashboard-kong-proxy 8443:443 &
kubectl -n monitoring port-forward svc/grafana 3000:80 &
kubectl -n monitoring port-forward svc/loki 3100 &
kubectl -n apps port-forward svc/nginx-hello-world 8082:80 &

🔐 Secrets for ArgoCD, Dashboard and Grafana

Retrieve the required tokens and passwords:

argocd admin initial-password -n argocd
kubectl create token dashboard-admin
kubectl get secret -n monitoring grafana -o jsonpath="{.data.admin-password}" | base64 --decode ; echo

📊 Logs (Loki)

• Grafana Source Endpoint: http://loki.monitoring:3100

Manually push logs to Loki:

curl -H "Content-Type: application/json" \
  -s -X POST "http://localhost:3100/loki/api/v1/push" \
  --data-raw '{"streams": [{ "stream": { "foo": "bar2", "service_name": "test" }, "values": [ [ "'$(date +%s)000000000'", "hello" ] ] }]}'

🛠️ Debugging

Run a temporary pod for debugging network connections:

kubectl run mycurlpod -n monitoring --image=curlimages/curl -i --tty -- sh
nslookup loki.monitoring

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📝 Todo

• Expose without port-forwarding :
  • Argo CD
  • Dashboard UI
  • Grafana
  • nginx
• Experiment Traefik
  • kubectl port-forward $(kubectl get pods --selector "app.kubernetes.io/name=traefik" --output=name) 8080:8080
  • http://localhost:8080/dashboard/
• Add more monitoring :
  • [ ] Mimir (my computer isn't strong enough to start all the pods 🙁)
  • Prometheus
  • Tempo
• Replace Kube dashboard with kubewall
  • https://github.com/kubewall/kubewall
• Experiment with BookInfo App or demo : https://opentelemetry.io/docs/demo/kubernetes-deployment/
• Add more apps :
  • JS HTTP server
  • Rust HTTP server