Gist of problematic dynamic inventory

dyninv.py

DOCUMENTATION = '''
    name: dyninv
    plugin_type: inventory
    author:
    - <@kittydoor>

    short_description: systems inventory source

    description:
    - SSH into all hosts provided, and use virsh to discover machines
    - Group them based on naming convention

    options:
      plugin:
        description: token for this plugin
        required: True
        choices: ['dyninv']
      hosts:
        description: list of host ip addr or urls to discover
        required: True
        type: list
'''

EXAMPLES = '''
# File must be named dyninv.yml

plugin: dyninv
hosts:
- d1
- d2
- d3
...
'''

from ansible.plugins.inventory import BaseInventoryPlugin

class InventoryModule(BaseInventoryPlugin):
    NAME = "dyninv"

    def parse(self, inventory, loader, path, cache=True):
        super(InventoryModule, self).parse(inventory, loader, path, cache)

        self._read_config_data(path)

        mydata = {
            "master-aaaa": "10.10.10.2",
            "node-aaaab": "10.10.10.3",
            "node-aaaac": "10.10.10.4"
        }

        for vm in mydata.items():
            self.inventory.add_host(vm.key)
            self.inventory.set_variable('ansible_host', vm.value)

dyninv.yml

plugin: dyninv
hosts:
- d1
- d2
- d3