Host module
===========

Description
-----------

The host module allows to ensure presence, absence and disablement of hosts.

The host module is as compatible as possible to the Ansible upstream `ipa_host` module, but additionally offers to disable hosts.


Features
--------
* Host management


Supported FreeIPA Versions
--------------------------

FreeIPA versions 4.4.0 and up are supported by the ipahost module.


Requirements
------------

**Controller**
* Ansible version: 2.8+

**Node**
* Supported FreeIPA version (see above)


Usage
=====

Example inventory file

```ini
[ipaserver]
ipaserver.test.local
```


Example playbook to ensure host presence:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is present
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      description: Example host
      ip_address: 192.168.0.123
      locality: Lab
      ns_host_location: Lab
      ns_os_version: CentOS 7
      ns_hardware_platform: Lenovo T61
      mac_address:
      - "08:00:27:E3:B1:2D"
      - "52:54:00:BD:97:1E"
      state: present
```
Compared to `ipa host-add` command no IP address conflict check is done as the ipahost module supports to have several IPv4 and IPv6 addresses for a host.


Example playbook to ensure host presence with several IP addresses:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is present
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      description: Example host
      ip_address:
      - 192.168.0.123
      - 192.168.0.124
      - fe80::20c:29ff:fe02:a1b3
      - fe80::20c:29ff:fe02:a1b4
      locality: Lab
      ns_host_location: Lab
      ns_os_version: CentOS 7
      ns_hardware_platform: Lenovo T61
      mac_address:
      - "08:00:27:E3:B1:2D"
      - "52:54:00:BD:97:1E"
      state: present
```


Example playbook to ensure IP addresses are present for a host:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is present
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      ip_address:
      - 192.168.0.124
      - fe80::20c:29ff:fe02:a1b4
      action: member
      state: present
```


Example playbook to ensure IP addresses are absent for a host:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is present
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      ip_address:
      - 192.168.0.124
      - fe80::20c:29ff:fe02:a1b4
      action: member
      state: absent
```


Example playbook to ensure host presence without DNS:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is present without DNS
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host02.example.com
      description: Example host
      force: yes
```


Example playbook to ensure host presence with a random password:

```yaml
---
- name: Ensure host with random password
  hosts: ipaserver
  become: true

  tasks:
  - name: Host host01.example.com present with random password
    ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      random: yes
      force: yes
      update_password: on_create
    register: ipahost

  - name: Print generated random password
    debug:
      var: ipahost.host.randompassword
```
Please remember that a new random password will be generated for an existing but not enrolled host if `update_password` is not limited to `on_create`. For an already enrolled host the task will fail with `update_password` default setting `always`.

Example playbook to ensure presence of several hosts with a random password:

```yaml
---
- name: Ensure hosts with random password
  hosts: ipaserver
  become: true

  tasks:
  - name: Hosts host01.example.com and host01.example.com present with random passwords
    ipahost:
      ipaadmin_password: SomeADMINpassword
      hosts:
      - name: host01.example.com
        random: yes
        force: yes
        update_password: on_create
      - name: host02.example.com
        random: yes
        force: yes
        update_password: on_create
    register: ipahost

  - name: Print generated random password for host01.example.com
    debug:
      var: ipahost.host["host01.example.com"].randompassword

  - name: Print generated random password for host02.example.com
    debug:
      var: ipahost.host["host02.example.com"].randompassword
```
Please remember that a new random password will be generated for an existing but not enrolled host if `update_password` is not limited to `on_create`. For an already enrolled host the task will fail with `update_password` default setting `always`.


Example playbook to ensure presence of host member principal:

```yaml
---
- name: Host present with principal
  hosts: ipaserver
  become: true

  tasks:
  - name: Host host01.example.com present with principals host/testhost01.example.com and host/myhost01.example.com
    ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      principal:
      - host/testhost01.example.com
      - host/myhost01.example.com
      action: member
```


Example playbook to ensure presence of host member certificate:

```yaml
- name: Host present with certificate
  hosts: ipaserver
  become: true

  tasks:
  - name: Host host01.example.com present with certificate
    ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      certificate:
      - MIIC/zCCAeegAwIBAg...
      action: member
```


Example playbook to ensure presence of member managedby_host for serveral hosts:

```yaml
---
- name: Host present with managedby_host
  hosts: ipaserver
  become: true

  tasks:
    ipahost:
      ipaadmin_password: SomeADMINpassword
      hosts:
      - name: host01.exmaple.com
        managedby_host: server.exmaple.com
      - name: host02.exmaple.com
        managedby_host: server.exmaple.com
      action: member
```


Example playbook to disable a host:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is disabled
  - ipahost:
      ipaadmin_password: SomeADMINpassword
      name: host01.example.com
      update_dns: yes
      state: disabled
```
`update_dns` controls if the DNS entries will be updated in this case. For `state` present it is controlling the update of the DNS SSHFP records, but not the the other DNS records.


Example playbook to ensure a host is absent:

```yaml
---
- name: Playbook to handle hosts
  hosts: ipaserver
  become: true

  tasks:
  # Ensure host is absent
  - ipahost:
      ipaadmin_password: password1
      name: host01.example.com
      state: absent
```


Variables
=========

ipahost
-------

Variable | Description | Required
-------- | ----------- | --------
`ipaadmin_principal` | The admin principal is a string and defaults to `admin` | no
`ipaadmin_password` | The admin password is a string and is required if there is no admin ticket available on the node | no
`name` \| `fqdn` | The list of host name strings. `name` with *host variables* or `hosts` containing *host variables* need to be used. | no
**Host variables** | Only used with `name` variable in the first level. | no
`hosts` | The list of host dicts. Each `hosts` dict entry can contain **host variables**.<br>There is one required option in the `hosts` dict:| no
&nbsp; | `name` \| `fqdn` - The user name string of the entry. | yes
&nbsp; | **Host variables** | no
`update_password` |  Set password for a host in present state only on creation or always. It can be one of `always` or `on_create` and defaults to `always`. | no
`action` | Work on host or member level. It can be on of `member` or `host` and defaults to `host`. | no
`state` | The state to ensure. It can be one of `present`, `absent` or `disabled`, default: `present`. | yes


**Host Variables:**

Variable | Description | Required
-------- | ----------- | --------
`description` | The host description. | no
`locality` | Host locality (e.g. "Baltimore, MD"). | no
`location` \| `ns_host_location` | Host location (e.g. "Lab 2"). | no
`platform` \| `ns_hardware_platform` | Host hardware platform (e.g. "Lenovo T61"). | no
`os` \| `ns_os_version` | Host operating system and version (e.g. "Fedora 9"). | no
`password` \| `user_password` \| `userpassword` | Password used in bulk enrollment for absent or not enrolled hosts. | no
`random` \| `random_password` |  Initiate the generation of a random password to be used in bulk enrollment for absent or not enrolled hosts. | no
`certificate` \| `usercertificate` | List of base-64 encoded host certificates | no
`managedby` \| `principalname` \| `krbprincipalname` | List of hosts that can manage this host | no
`principal` \| `principalname` \| `krbprincipalname` | List of principal aliases for this host | no
`allow_create_keytab_user` \| `ipaallowedtoperform_write_keys_user` | Users allowed to create a keytab of this host. | no
`allow_create_keytab_group` \| `ipaallowedtoperform_write_keys_group` | Groups allowed to create a keytab of this host. | no
`allow_create_keytab_host` \| `ipaallowedtoperform_write_keys_host` | Hosts allowed to create a keytab of this host. | no
`allow_create_keytab_hostgroup` \| `ipaallowedtoperform_write_keys_hostgroup` | Host groups allowed to create a keytab of this host. | no
`allow_retrieve_keytab_user` \| `ipaallowedtoperform_read_keys_user` | Users allowed to retieve a keytab of this host. | no
`allow_retrieve_keytab_group` \| `ipaallowedtoperform_read_keys_group` | Groups allowed to retieve a keytab of this host. | no
`allow_retrieve_keytab_host` \| `ipaallowedtoperform_read_keys_host` | Hosts allowed to retieve a keytab of this host. | no
`allow_retrieve_keytab_hostgroup` \| `ipaallowedtoperform_read_keys_hostgroup` | Host groups allowed to retieve a keytab of this host. | no
`mac_address` \| `macaddress` | List of hardware MAC addresses. | no
`sshpubkey` \| `ipasshpubkey` | List of SSH public keys | no
`userclass` \| `class` | Host category (semantics placed on this attribute are for local interpretation) | no
`auth_ind` \| `krbprincipalauthind` | Defines a whitelist for Authentication Indicators. Use 'otp' to allow OTP-based 2FA authentications. Use 'radius' to allow RADIUS-based 2FA authentications. Use empty string to reset auth_ind to the initial value. Other values may be used for custom configurations. choices: ["radius", "otp", "pkinit", "hardened", ""] | no
`requires_pre_auth` \| `ipakrbrequirespreauth` | Pre-authentication is required for the service (bool) | no
`ok_as_delegate` \| `ipakrbokasdelegate` | Client credentials may be delegated to the service (bool) | no
`ok_to_auth_as_delegate` \| `ipakrboktoauthasdelegate` | The service is allowed to authenticate on behalf of a client (bool) | no
`force` | Force host name even if not in DNS. | no
`reverse` | Reverse DNS detection. | no
`ip_address` \| `ipaddress` | The host IP address list. It can contain IPv4 and IPv6 addresses. No conflict check for IP addresses is done. | no
`update_dns` | For existing hosts: DNS SSHFP records are updated with `state` present and all DNS entries for a host removed with `state` absent. | no


Return Values
=============

ipahost
-------

There are only return values if one or more random passwords have been generated.

Variable | Description | Returned When
-------- | ----------- | -------------
`host` | Host dict with random password. (dict) <br>Options: | If random is yes and host did not exist or update_password is yes
&nbsp; | `randompassword` - The generated random password | If only one host is handled by the module
&nbsp; | `name` - The host name of the host that got a new random password. (dict) <br> Options: <br> &nbsp; `randompassword` - The generated random password | If several hosts are handled by the module


Authors
=======

Thomas Woerner