specify grace period for draining

roles/upgrade/pre-upgrade/tasks/main.yml

@@ -5,8 +5,8 @@
   delegate_to: "{{ groups['kube-master'][0] }}"
 
 - name: Drain node
-  command: kubectl drain --force --ignore-daemonsets --delete-local-data {{ ansible_hostname }}
+  command: kubectl drain --force --ignore-daemonsets --grace-period 30 --delete-local-data {{ ansible_hostname }}
   delegate_to: "{{ groups['kube-master'][0] }}"
 
 - name: Sleep for grace period for draining
-  pause: seconds=30
+  pause: seconds=30