The project introduces the ArgoCD extension to enable Metrics on Resource tab.

• Install Argo CD and Argo CD Extensions Controller: https://github.com/argoproj-labs/argocd-extensions
• Create argocd-metrics-server deployment in argocd namespace

kubectl apply -n argocd \
    -f https://raw.githubusercontent.com/argoproj-labs/argocd-extension-metrics/main/manifests/install.yaml

kubectl apply -n argocd https://raw.githubusercontent.com/argoproj-labs/argocd-extension-metrics/main/manifests/configmap.yaml

• Create argocd-extension-metrics extension in argocd namespace

kubectl apply -n argocd \
    -f https://raw.githubusercontent.com/argoproj-labs/argocd-extension-metrics/main/manifests/extension.yaml

ArgoCD version less than v2.7 doesn't support the Backend Proxy. You have to configure the Ingress to deviate the API calls between ArgoCD server and ArgoCD metrics Server

spec:
  rules:
    - http:
        paths:
          - backend:
              service:
                name: argocd-o11y-server
                port:
                  number: 9003
            path: /extensions/metrics
            pathType: Prefix
          - backend:
              service:
                name: argocd-server
                port:
                  number: 80
            path: /
            pathType: Prefix

ArgoCD Team is working to implemented backend proxy proposal