Modified playbook to give fail message when disk space is nearly full

playbooks/disk-space.yml

@@ -3,6 +3,11 @@
   hosts: all
   tasks:
     - name: Check free disk space
-      shell: df -kh / | tail -n1 | awk '{print $5}'
+      shell: df / --output\=avail | tail -1
       register: free
-    - debug: var=free.stdout_lines
+    - name: free-space
+      debug:
+        msg: Available space = "{{ free.stdout|int / 1000000 }}"
+    - fail:
+        msg: / is nearly full
+      when: free.stdout|int is lt 3000000