add enable-kubelet on second boot

00-provisioning/butane/full.yaml

@@ -47,7 +47,7 @@ storage:
         inline: |
           net.bridge.bridge-nf-call-iptables=1
           net.ipv4.ip_forward=1
-    # script to install kubelet dependencies
+    # Runs on first boot, script to install kubelet dependencies
     - path: /usr/local/bin/install-kubelet.sh
       mode: 0744
       overwrite: true
@@ -55,8 +55,6 @@ storage:
         inline: |
           #!/bin/bash
           rpm-ostree install kubelet kubeadm kubectl cri-o vim
-          systemctl enable crio kubelet
-          sleep 1 # systemctl enable and reboot race condition?
           systemctl reboot
     - path: /home/steven/cluster-config.yaml
       mode: 0600
@@ -112,3 +110,18 @@ systemd:
 
         [Install]
         WantedBy=multi-user.target
+    - name enable-kubelet.service
+      enabled: true
+      contents: |
+        [Unit]
+        Before=systemd-user-sessions.service
+        Wants=network-online.target
+        After=network-online.target
+        ConditionPathExists=/var/lib/install-kubelet
+        ConditionPathExists=!/var/lib/enable-kubelet
+
+        [Service]
+        Type=oneshot
+        ExecStart=/usr/bin/systemctl enable --now crio kubelet
+        ExecStartPost=/usr/bin/touch /var/lib/enable-kubelet
+        RemainAfterExit=yes