Issue #320: user_data cloud-init script in docs/examples/networking/nat/ fails to run. (#321)

Author: jlamillan

docs/examples/networking/nat/user_data.tpl

@@ -1,16 +1,14 @@
-#
-# Create file to be used when enabling ip forwarding
-#
+#cloud-config
+
 write_files:
+  # Create file to be used when enabling ip forwarding
   - path: /etc/sysctl.d/98-ip-forward.conf
     content: |
       net.ipv4.ip_forward = 1
 
-#
-# Run firewall commands to enable masquerading and port forwarding
-# Enable ip forwarding by setting sysctl kernel parameter
-#
 runcmd:
+  # Run firewall commands to enable masquerading and port forwarding
+  # Enable ip forwarding by setting sysctl kernel parameter
   - firewall-offline-cmd --direct --add-rule ipv4 nat POSTROUTING 0 -o ens3 -j MASQUERADE
   - firewall-offline-cmd --direct --add-rule ipv4 filter FORWARD 0 -i ens3 -j ACCEPT
   - /bin/systemctl restart firewalld