ansible.builtin.add_host – Add a host (and alternatively a group) to the ansible-playbook in-memory inventory


This module is part of ansible-core and included in all Ansible installations. In most cases, you can use the short module name add_host even without specifying the collections: keyword. However, we recommend you use the FQCN for easy linking to the module documentation and to avoid conflicting with other collections that may have the same module name.

New in version 0.9: of ansible.builtin


  • Use variables to create new hosts and groups in inventory for use in later plays of the same playbook.
  • Takes variables so you can define the new hosts more fully.
  • This module is also supported for Windows targets.


This module has a corresponding action plugin.


Parameter Choices/Defaults Comments
list / elements=string
The groups to add the hostname to.

aliases: group, groupname
string / required
The hostname/ip of the host to add to the inventory, can include a colon and a port number.

aliases: host, hostname



  • This module bypasses the play host loop and only runs once for all the hosts in the play, if you need it to iterate use a loop construct. If you need to dynamically add all hosts targeted by a playbook for later use, the group_by module is potentially a better choice.
  • The alias host of the parameter name is only available on Ansible 2.4 and newer.
  • Since Ansible 2.4, the inventory_dir variable is now set to None instead of the ‘global inventory source’, because you can now have multiple sources. An example was added that shows how to partially restore the previous behaviour.
  • Windows targets are supported by this module.
  • Though this module does not change the remote host, we do provide ‘changed’ status as it can be useful for those trying to track inventory changes.

See Also

See also


The official documentation on the ansible.builtin.group_by module.


- name: Add host to group 'just_created' with variable foo=42
    name: '{{ ip_from_ec2 }}'
    groups: just_created
    foo: 42

- name: Add host to multiple groups
    hostname: '{{ new_ip }}'
    - group1
    - group2

- name: Add a host with a non-standard port local to your machines
    name: '{{ new_ip }}:{{ new_port }}'

- name: Add a host alias that we reach through a tunnel (Ansible 1.9 and older)
    hostname: '{{ new_ip }}'
    ansible_ssh_host: '{{ inventory_hostname }}'
    ansible_ssh_port: '{{ new_port }}'

- name: Add a host alias that we reach through a tunnel (Ansible 2.0 and newer)
    hostname: '{{ new_ip }}'
    ansible_host: '{{ inventory_hostname }}'
    ansible_port: '{{ new_port }}'

- name: Ensure inventory vars are set to the same value as the inventory_hostname has (close to pre Ansible 2.4 behaviour)
    hostname: charlie
    inventory_dir: '{{ inventory_dir }}'

- name: Add all hosts running this playbook to the done group
    name: '{{ item }}'
    groups: done
  loop: "{{ ansible_play_hosts }}"


  • Ansible Core Team
  • Seth Vidal (@skvidal)

© 2012–2018 Michael DeHaan
© 2018–2021 Red Hat, Inc.
Licensed under the GNU General Public License version 3.