powershell PowerShell:备份Active Directory#PowerShell#ActiveDirectory

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<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
  <RegistrationInfo>
    <Date>2013-10-07T09:08:50.3896932</Date>
    <Author>Janik von Rotz(http://janikvonrotz.ch)</Author>
    <Description>Backup ActiveDirectory</Description>
  </RegistrationInfo>
  <Triggers>
    <CalendarTrigger>
      <StartBoundary>2013-01-01T04:30:00</StartBoundary>
      <Enabled>true</Enabled>
      <ScheduleByDay>
        <DaysInterval>1</DaysInterval>
      </ScheduleByDay>
    </CalendarTrigger>
  </Triggers>
  <Settings>
    <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
    <DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
    <StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
    <AllowHardTerminate>true</AllowHardTerminate>
    <StartWhenAvailable>false</StartWhenAvailable>
    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
    <IdleSettings>
      <StopOnIdleEnd>true</StopOnIdleEnd>
      <RestartOnIdle>false</RestartOnIdle>
    </IdleSettings>
    <AllowStartOnDemand>true</AllowStartOnDemand>
    <Enabled>true</Enabled>
    <Hidden>false</Hidden>
    <RunOnlyIfIdle>false</RunOnlyIfIdle>
    <WakeToRun>false</WakeToRun>
    <ExecutionTimeLimit>P1D</ExecutionTimeLimit>
    <Priority>7</Priority>
  </Settings>
  <Actions Context="Author">
    <Exec>
      <Command>$PSapps.PowerShell</Command>
      <Arguments>$(Get-ChildItem -Path $PSscripts.Path -Filter "Backup-ActiveDirectory.ps1" -Recurse).Fullname</Arguments>
      <WorkingDirectory>$PSProfile.Path</WorkingDirectory>
    </Exec>
  </Actions>
</Task>
<#
$Metadata = @{
	Title = "Backup ActiveDirecotry"
	Filename = "Backup-ActiveDirectory.ps1"
	Description = ""
	Tags = "backup, active, directory, ntsutil"
	Project = ""
	Author = "Janik von Rotz"
	AuthorContact = "http://janikvonrotz.ch"
	CreateDate = "2014-04-15"
	LastEditDate = "2014-04-15"
	Url = ""
	Version = "0.0.0"
	License = @'
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Switzerland License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ch/ or 
send a letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
'@
}
#>

try{

    <#
    #--------------------------------------------------#
	# about
	#--------------------------------------------------#
    
    The restore and backup process is described here: http://technet.microsoft.com/en-us/library/dd581644(WS.10).aspx
    
    #>
    
    #--------------------------------------------------#
	# settings
	#--------------------------------------------------#

    $Path = "C:\backup\ActiveDirectory"

	#--------------------------------------------------#
	# main
	#--------------------------------------------------#

    # create backup file name
    $Filename = "ADBackupFull" + "#" + $((Get-Date -Format s) -replace ":","-") + ".bak"
    $Filepath = Join-Path $Path $Filename

    # backup active directory
    Invoke-Expression 'ntdsutil "activate instance ntds" ifm "create full $Filepath" quit quit'
    
    # get dates for backup retention exclusion
    $Today = Get-Date -Format d
    $FirstDateOfWeek = Get-Date (Get-Date).AddDays(-[int](Get-Date).Dayofweek) -Format d
    $FirstDateOfMonth = Get-Date -Day 1 -Format d

    # delete all backups except for today, first day of week and first day of month
    Get-ChildItem $Path | select *,@{L="CreationTimeDate";E={Get-Date $_.CreationTime -Format d}} | Group-Object CreationTimeDate | %{
        
        # only one backup per day
        if($_.Count -gt 1){
            
            $_.Group | Sort-Object CreationTime -Descending | Select-Object -Skip 1     
        }
                
        # keep only required backups
        $_.Group | Where-Object{$_.CreationTimeDate -ne $Today -and $_.CreationTimeDate -ne $FirstDateOfWeek -and $_.CreationTimeDate -ne $FirstDateOfMonth}
            
    } | Remove-Item -Recurse -Force
    
}catch{

    Write-PPErrorEventLog -Source "Backup ActiveDirectory" -ClearErrorVariable
}

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