ansible replay fails if kubeadm init was not successful

Ansible replay is broken since the introduction of kubelet-fs
e74ef5f7c4

The kubelet-fs change uncovered a flaw in kubeadm reset
https://github.com/kubernetes/kubeadm/issues/1294

kubeadm will sometimes unmount /var/lib/kubelet/. To correct this we
will remount the kubelet-lv on ansible replays and wipe the contents.

Change-Id: Ie4d6009bb2d53561586a8b62d1ab92a0859119fb
Signed-off-by: David Sullivan <david.sullivan@windriver.com>
Closes-Bug: 1838692

playbookconfig/src/playbooks/bootstrap/roles/persist-config/tasks/shutdown_services.yml

@@ -28,6 +28,23 @@
   - name: Shut down and remove Kubernetes components
     command: kubeadm reset -f
 
+  # Cleanup kubelet-lv
+  # Due to https://github.com/kubernetes/kubeadm/issues/1294 kubeadm will
+  # unmount /var/lib/kubelet. We need to remount the kubelet-lv and remove its
+  # contents.
+  - block:
+    - name: Mount kubelet-lv
+      command: mount /var/lib/kubelet/
+      args:
+        warn: false
+
+    - name: Clear kubelet data
+      shell: /bin/rm -rf /var/lib/kubelet/*
+      args:
+        warn: false
+
+    when: '"/var/lib/kubelet/" is not mount'
+
   - name: Clear etcd data cache
     shell: /bin/rm -rf /opt/etcd/{{ software_version }}/controller.etcd/*
     args: