ignore errors if firewalld is not installed

roles/iptables/tasks/main.yml

@@ -1,11 +1,12 @@
 ---
-  
+
   - name: Install iptables-services
     yum: name=iptables-services state=installed
     tags: rpm
 
   - name: Disable firewalld
     service: name=firewalld state=stopped enabled=no
+    ignore_errors: yes # The firewalld service might not be installed, ignore error
 
   - name: Enable iptables
     service: name=iptables state=started enabled=yes