host (file name)[server-a]server-a[server-b]server-b
[appserver:children]server-aserver-b
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host_details (file name)
[server-a:vars]env_name=server-aansible_ssh_user=rootansible_ssh_host=10.0.0.1ansible_ssh_private_key_file=~/.ssh/xyz-key.pem[server-b:vars]env_name=server-bansible_ssh_user=rootansible_ssh_host=10.0.0.2ansible_ssh_private_key_file=~/.ssh/xyz-key.pem