created butane file

k8s/butane.yml

@@ -0,0 +1,55 @@
+variant: fcos
+version: 1.5.0
+passwd:
+  users:
+    - name: core
+      ssh_authorized_keys:
+        - "ssh-rsa YOUR_PUBLIC_SSH_KEY_HERE"
+
+storage:
+  files:
+    # 1. Load required kernel modules for Kubernetes/CRI-O
+    - path: /etc/modules-load.d/k8s.conf
+      mode: 0644
+      contents:
+        inline: |
+          overlay
+          br_netfilter
+
+    # 2. Configure Sysctl for networking
+    - path: /etc/sysctl.d/k8s.conf
+      mode: 0644
+      contents:
+        inline: |
+          net.bridge.bridge-nf-call-iptables  = 1
+          net.bridge.bridge-nf-call-ip6tables = 1
+          net.ipv4.ip_forward                 = 1
+
+systemd:
+  units:
+    # 3. Ensure CRI-O (Container Runtime) is enabled and started
+    - name: crio.service
+      enabled: true
+
+    # 4. Kubelet Service definition
+    - name: kubelet.service
+      enabled: true
+      contents: |
+        [Unit]
+        Description=Kubernetes Kubelet
+        Documentation=https://github.com/kubernetes/kubernetes
+        After=crio.service
+        Requires=crio.service
+
+        [Service]
+        ExecStartPre=/usr/bin/mkdir -p /etc/kubernetes/manifests
+        ExecStart=/usr/bin/kubelet \
+          --container-runtime-endpoint=unix:///var/run/crio/crio.sock \
+          --register-node=true \
+          --v=2
+        Restart=always
+        StartLimitInterval=0
+        RestartSec=10
+
+        [Install]
+        WantedBy=multi-user.target