Get Host Variables

$ ansible hostname -m debug -a "var=hostvars"

hostname | SUCCESS => {
    "changed": false,
    "hostvars": {
        "hostname": {
            "ansible_check_mode": false,
            "ansible_connection": "ssh",
            "ansible_playbook_python": "/usr/bin/python",
            "ansible_ssh_pass": "xxxxxxxxxx",
            "ansible_ssh_user": "root",
            "ansible_version": {
                "full": "2.4.3.0",
                "major": 2,
                "minor": 4,
                "revision": 3,
                "string": "2.4.3.0"
            },
            "app_name": "application_something",
            "group_names": [
                "provisioning"
            ],
            "groups": {
                "all": [
                    "hostname"
                ],
                "bootstrap": [],
                "provisioning": [
                    "hostname"
                ],
                "ungrouped": []
            },
            "inventory_dir": "/home/kgeorg/playbooks/ansible/inventory",
            "inventory_file": "/home/kgeorg/playbooks/ansible/inventory/hosts",
            "inventory_hostname": "hostname",
            "inventory_hostname_short": "hostname",
            "omit": "__omit_place_holder__fae868a6264f3f7164e905a5f1d0969a21cfe8e7",
            "playbook_dir": "/home/kgeorg/playbooks/ansible"
        }
    }
}