win_domain_child

win_domain_child.ps1

#!powershell

# Copyright: (c) 2022 Jordan Borean (@jborean93) jborean93@gmail.com
# Copyright: (c) 2023, Ryan Cobb <ryancobb65@gmail.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

#AnsibleRequires -CsharpUtil Ansible.Basic

# win_domain_child module

$spec = @{
    options             = @{
        dns_domain_name       = @{ type = 'str' }
        domain_admin_password = @{ type = 'str'; required = $true; no_log = $true }
        domain_admin_username = @{ type = 'str'; required = $true }
        domain_mode           = @{ type = 'str'; choices = 'Win2008', 'Win2008R2', 'Win2012', 'Win2012R2', 'WinThreshold', 'Default' }
        safe_mode_password    = @{ type = 'str'; required = $true; no_log = $true }
        site_name             = @{ type = 'str' }
    }
    required_together   = @(
        , @("domain_admin_username", "domain_admin_password")
    )
    supports_check_mode = $true
}
$module = [Ansible.Basic.AnsibleModule]::Create($args, $spec)

$dns_domain_name = $module.Params.dns_domain_name
$domain_admin_password = $module.Params.domain_admin_password
$domain_admin_username = $module.Params.domain_admin_username
$domain_mode = $module.Params.domain_mode
$safe_mode_password = $module.Params.safe_mode_password
$site_name = $module.Params.site_name

$module.Result.reboot_required = $false

$system_role = Get-CimInstance -ClassName Win32_ComputerSystem -Property Domain, DomainRole
if ($system_role.DomainRole -in @(4, 5))
{
    if ($system_role.Domain -ne $dns_domain_name)
    {
        $module.FailJson("Host is already a domain controller in another domain $($system_role.Domain)")
    }
    $module.ExitJson()
}

$new_domain_name, $parent_domain_name = $dns_domain_name.Split(".", 2)

$domain_admin_credential = New-Object -TypeName PSCredential -ArgumentList @(
    $domain_admin_username,
    (ConvertTo-SecureString -AsPlainText -Force -String $domain_admin_password)
)
$install_params = @{
    NewDomainName                 = $new_domain_name
    ParentDomainName              = $parent_domain_name
    DomainType                    = 'ChildDomain'
    NoRebootOnCompletion          = $true
    SafeModeAdministratorPassword = (ConvertTo-SecureString -AsPlainText -Force -String $safe_mode_password)
    Force                         = $true
    Credential                    = $domain_admin_credential
    WhatIf                        = $module.CheckMode
    ErrorAction                   = 'Stop'
}
if ($domain_mode)
{
    $install_params.DomainMode = $domain_mode
}
if ($site_name)
{
    $install_params.SiteName = $site_name
}

$install_domain = $null
try {
    $install_domain = Install-ADDSDomain @install_params
}
catch {
    # DCPromo exit codes details can be found at
    # https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/troubleshooting-domain-controller-deployment
    # ExitCode 1 == 'Exit, success'
    # ExitCode 2 == 'Exit, success, need to reboot'
    # ExitCode 3 == 'Exit, success, with a noncritical failure'
    # ExitCode 4 == 'Exit, success, with a noncritical failure, need to reboot'
    if ($_.Exception.ErrorCode -in @(1, 2, 3, 4)) {
        $module.Result.changed = $true
        $module.Result.reboot_required = $true
    }
    # ExitCode 15 == 'Role change is in progress or needs reboot'
    # ExitCode 19 == 'Name change pending, needs reboot'
    # ExitCode 53 == 'The promotion/demotion failed, machine must be rebooted to clean up'
    # ExitCode 56 == 'The promotion/demotion was canceled by the user, machine must be rebooted to clean up'
    elseif ($_.Exception.ErrorCode -in @(15, 19, 53, 56)) {
        $module.Result.changed = $false
        $module.Result.reboot_required = $true
    }
    # ExitCode 45 == 'A forest with the specified name already exists'
    # ExitCode 47 == 'A tree with the specified name already exists'
    elseif ($_.Exception.ErrorCode -in @(45, 47))
    {
        $module.Result.changed = $false
    }
    else
    {
        $module.FailJson("Failed to install ADDSDomain, DCPromo exited with $($_.Exception.ExitCode)", $_)
    }
}

if ($install_domain)
{
    $module.Result.changed = $true
    $module.Result.reboot_required = $true

    if (-not $module.CheckMode)
    {
        # The Netlogon service is set to auto start but is not started. This is
        # required for Ansible to connect back to the host and reboot in a
        # later task. Even if this fails Ansible can still connect but only
        # with ansible_winrm_transport=basic so we just display a warning if
        # this fails.
        try {
            $started = Start-Service -Name Netlogon
        }
        catch {
            $msg = -join @(
                "Failed to start the Netlogon service after promoting the host, "
                "Ansible may be unable to connect until the host is manually rebooted: $($_.Exception.Message)"
            )
            $module.Warn($msg)
        }
    }
}

$module.ExitJson()

win_domain_child.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright: (c) 2022 Jordan Borean (@jborean93) jborean93@gmail.com
# Copyright: (c) 2023, Ryan Cobb <ryancobb65@gmail.com>
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

DOCUMENTATION = r'''
---
module: win_domain_child
short_description: Ensure the existence of a Windows child domain within a forest.
description:
- Ensure the existence of a Windows child domain within a forest.
- This module may require subsequent use of the M(ansible.windows.win_reboot) action if changes are made.
options:
  dns_domain_name:
    description:
    - The DNS name of the domain which should exist and be reachable or reside on the target Windows host.
    type: str
    required: yes
  domain_admin_username:
    description:
    - The username of a domain admin used to authenticate with the remote domain.
    type: str
    required: yes
  domain_admin_password:
    description:
    - The password of the domain admin used to authenticate with the remote domain.
    type: str
    required: yes
  domain_mode:
    description:
    - Specifies the domain functional level of the first domain in the creation of a new forest.
    type: str
    choices: [ Win2008, Win2008R2, Win2012, Win2012R2, WinThreshold, Default ]
    required: no
  safe_mode_password:
    description:
    - Specifies the password for the administrator account when the computer is started in Safe Mode.
    type: str
    required: yes
  site_name:
    description:
    - Specifies the name of an existing site where you can place the new domain controller.
    type: str
    required: no
author:
- Ryan Cobb (@cobbr)
'''

EXAMPLES = r'''
- name: Create a domain child within a forest
  win_domain_child:
    name: child.domain.local
    domain_admin_username: Administrator
    domain_admin_password: Password123!
    safe_mode_password: Password123!
  register: child_domain
'''