Simple Guide: Install Argo CD in Kubernetes

1. Create a Namespace for Argo CD

kubectl create namespace argocd

2. Install Argo CD

Apply the Argo CD manifest in the argocd namespace:

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

3. Access the Argo CD UI

Option 1: Port Forwarding

Expose the Argo CD API server locally:

kubectl port-forward svc/argocd-server -n argocd 8080:443
# or
kubectl patch svc argocd-server -n argocd -p '{"spec": {"type": "NodePort", "ports": [{"port": 80, "targetPort": 8080, "nodePort": 30080}, {"port": 443, "targetPort": 8081, "nodePort": 30443}]}}'
 

Access the UI at: https://localhost:8080 (opens in a new tab)

Option 2: Ingress (Optional)

If you prefer external access, set up an ingress with your domain.

4. Log In to Argo CD

1. Get the initial admin password:

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

2. Login to the Argo CD UI:

   • Username: admin
   • Password: [Use the password from above]

5. Deploy Your First Application

1. Connect your Git repository from the Settings > Repositories in the Argo CD UI.
2. Create a new application by specifying:
   • Application Name
   • Repository URL
   • Target Namespace and other settings.

Argo CD will deploy the application to your Kubernetes cluster.