Update .gitignore to include generated noble-lab-ui-urls.md and enhance README.md with new role documentation. Refactor noble.yml to incorporate noble_landing_urls role for improved URL management. Add ingress configurations for alertmanager, prometheus, longhorn, and vault to support TLS termination via Traefik. Update network policies and values.yaml for vault to allow traffic from Traefik. These changes aim to streamline deployment and enhance service accessibility.

clusters/noble/bootstrap/argocd/README.md

@@ -35,6 +35,17 @@ echo
 
 Change the password in the UI or via `argocd account update-password`.
 
+### TLS: changing ClusterIssuer (e.g. staging → prod)
+
+If **`helm upgrade --wait`** fails with *Secret was previously issued by `letsencrypt-staging`* (or another issuer), cert-manager will not replace the TLS Secret in place. Remove the old cert material once, then upgrade again:
+
+```bash
+kubectl -n argocd delete certificate argocd-server --ignore-not-found
+kubectl -n argocd delete secret argocd-server-tls --ignore-not-found
+helm upgrade --install argocd argo/argo-cd -n argocd --create-namespace \
+  --version 9.4.17 -f clusters/noble/bootstrap/argocd/values.yaml --wait
+```
+
 ## 3. Register this repo (if private)
 
 Use **Settings → Repositories** in the UI, or `argocd repo add` / a `Secret` of type `repository`.