Install ArgoCD on K3s (Step-by-Step 2026)

Here is how to install ArgoCD on K3s in 2026. Tested and verified.

Prerequisites

• K3s cluster running (Install K3s on Ubuntu)

Install ArgoCD

kubectl create namespace argocd
kubectl apply -n argocd -f https://raw.githubusercontent.com/argoproj/argo-cd/stable/manifests/install.yaml
kubectl wait --for=condition=ready pod -l app.kubernetes.io/name=argocd-server -n argocd --timeout=120s

Expose via K3s Traefik Ingress

# argocd-ingress.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: argocd-server
  namespace: argocd
  annotations:
    traefik.ingress.kubernetes.io/router.tls: "true"
spec:
  rules:
    - host: argocd.local
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: argocd-server
                port:
                  number: 443

kubectl apply -f argocd-ingress.yaml

Get Admin Password

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

Related Resources

• ArgoCD Cheat Sheet
• Install ArgoCD on Kubernetes
• Install K3s on Ubuntu