diff --git a/k8s/c1/kubeadm.yaml b/k8s/c1/kubeadm.yaml
new file mode 100644
index 0000000..02ed804
--- /dev/null
+++ b/k8s/c1/kubeadm.yaml
@@ -0,0 +1,12 @@
+# kubeadm-config.yaml
+kind: ClusterConfiguration
+apiVersion: kubeadm.k8s.io/v1beta2
+kubernetesVersion: v1.21.2
+networking:
+  dnsDomain: c1.k8s.ooo
+  podSubnet: 2a0a:e5c0:2:11:1::/108
+  serviceSubnet: 2a0a:e5c0:2:11:2::/108
+---
+kind: KubeletConfiguration
+apiVersion: kubelet.config.k8s.io/v1beta1
+cgroupDriver: cgroupfs