gistfile1.txt

- name: Configure iptables for Master
  user: root
  hosts: "{{spark_master_group_name}}"
  sudo: yes
  vars_files:
    - ../vars/network-vars.yml 
    - ../vars/spark-vars.yml  
  tasks:    
    - name: Add rule to firewall for all ports          
      iptables: chain=INPUT in_interface=eth1 source={{hostvars[item][ip_interface]['ipv4']['address']}} jump=ACCEPT
      with_items: "{{ groups[spark_cluster ~ 'spark_master'] | union(groups['inventorycalc_' ~ spark_cluster ~ '_node']) | union(groups[spark_cluster ~ 'spark_master']) }}"