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

- Synopsis

- Parameters

- Notes

- See Also

- Examples

- Status

## Synopsis

- 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.

## Parameters

Parameter | Choices/Defaults | Comments
--- | --- | ---
groups list |  | The groups to add the hostname to. aliases: group, groupname
name string / required |  | The hostname/ip of the host to add to the inventory, can include a colon and a port number. aliases: host, hostname

## Notes

Note

- 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 with-loop construct.

- 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.

## See Also

See also

group_by – Create Ansible groups based on facts

  The official documentation on the group_by module.

## Examples

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

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

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

    - name: Add a host alias that we reach through a tunnel (Ansible 1.9 and older)
      add_host:
        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)
      add_host:
        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)
      add_host:
        hostname: charlie
        inventory_dir: '{{ inventory_dir }}'

## Status

- This module is guaranteed to have backward compatible interface changes going forward. [stableinterface]

- This module is maintained by the Ansible Core Team. [core]

### Red Hat Support

More information about Red Hat’s support of this module is available from this Red Hat Knowledge Base article.

### Authors

- Ansible Core Team

- Seth Vidal (@skvidal)

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