iterate over a sub element

iterations.md

In inventory, have these defined

hostgroups: {
 'group1': [
    '1.1.1.1',
    '1.1.1.2.'
    '1.1.1.3'
    ],
 'group2': [
    '1.1.2.1',
    '1.1.3.1'
    ]
}

iterhosts: [1,2,3]
groups: ['group1', 'group2']

In task, have this defined:

  - name: Check if nodes are online
    test_tcp:
      host: "{{ hostgroups[item.0][item.1] }}"
      state: open
      port: 22
    with_nested:
      - groups
      - iterhosts