fix cilium routing and cluster dns

ansible/roles/flatcar_k3d_host/defaults/main.yml

@@ -21,3 +21,12 @@ bootstrap_repo_source: "{{ playbook_dir }}/.."
 
 kubeconfig_fetch_enabled: true
 kubeconfig_artifact_dir: "{{ playbook_dir }}/../artifacts"
+kubeconfig_import_enabled: true
+kubeconfig_default_path: "{{ lookup('env', 'HOME') }}/.kube/config"
+kubeconfig_context_name: "k3d-{{ k3d_cluster_name }}"
+kubeconfig_server_host: "{{ ansible_host }}"
+
+# Optional upstream DNS servers for nested k3d hosts. Docker may expose an
+# unreachable bridge resolver to CoreDNS, so provide the host's real resolvers
+# when pods must resolve external Git or webhook endpoints.
+k3d_dns_servers: []