Deleting old log files on Windows periodically (see https://serverfault.com/a/1031301/252212)

create-task_delete-old-service-logs.ps1

[CmdletBinding()]


param(
  [Parameter(Position=0, Mandatory=$true)]
  [ValidateNotNullOrEmpty()]
  [string]$LogsDirPath,

  [Parameter(Position=1)]
  [int]$LogsFileMaxN = 31,

  [Parameter(Position=2)]
  [ValidateNotNullOrEmpty()]
  [string]$LogsFileNamePattern = "service.????-??-??.log",

  [Parameter(Position=3)]
  [ValidateNotNullOrEmpty()]
  [string]$TaskScriptFilePath = "delete-old-service-logs.ps1",

  [Parameter(Position=4)]
  [ValidateNotNullOrEmpty()]
  [string]$TaskName = "SERVICE NAME - Delete Old Logs",

  [Parameter(Position=5)]
  [ValidateNotNullOrEmpty()]
  [string]$TaskDescription = "Delete old logs of SERVICE NAME aggregated via Fluentd",

  [Parameter(Position=6)]
  [ValidateNotNullOrEmpty()]
  [string]$TaskTriggerTime = "5:00:00 AM"
)


try {
  $LogsDirPath = Resolve-Path -Path $LogsDirPath
}
catch {
  throw "Specified logs dir path does not exist (path='$LogsDirPath')"
}

if(-Not ($LogsDirPath | Test-Path -PathType Container) ){
  throw "Specified logs dir path does not point to a directory (path='$LogsDirPath')"
}


try {
  $TaskScriptFilePath = Resolve-Path -Path $TaskScriptFilePath
}
catch {
  throw "Specified task script file path does not exist (path='$TaskScriptFilePath')"
}

if( -Not ($TaskScriptFilePath | Test-Path -PathType Leaf) ){
  throw "Specified task script file path is not a file (path='$TaskScriptFilePath')"
}


$TaskAction = New-ScheduledTaskAction -Execute "C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" `
  -Argument "-NoProfile -WindowStyle Hidden -command ""$TaskScriptFilePath -LogsDirPath ""$LogsDirPath"" -LogsFileMaxN $LogsFileMaxN -LogsFileNamePattern ""$LogsFileNamePattern"""""


$TaskTrigger = New-ScheduledTaskTrigger -Daily -At $TaskTriggerTime


Register-ScheduledTask -TaskName $TaskName -Description $TaskDescription -Action $TaskAction -Trigger $TaskTrigger

delete-old-service-logs.ps1

[CmdletBinding()]

param(
  [Parameter(Position=0, Mandatory=$true)]
  [ValidateScript({
    if( -Not ($_ | Test-Path) ){
      throw "Specified logs dir path does not exist (path='$_')"
    }
    if(-Not ($_ | Test-Path -PathType Container) ){
      throw "Specified logs dir path does not point to a directory (path='$_')"
    }
    return $true
  })]
  [string]$LogsDirPath,

  [Parameter(Position=1)]
  [int]$LogsFileMaxN = 31,

  [Parameter(Position=2)]
  [ValidateNotNullOrEmpty()]
  [string]$LogsFileNamePattern = "service.????-??-??.log"
)


[string[]]$FileNamesToRemove = Get-ChildItem -Path $LogsDirPath -Filter $LogsFileNamePattern |
  Sort-Object -Property CreationTime -Descending |
  Select-Object -Skip $LogsFileMaxN |
  Select -ExpandProperty "Name"


$Shell = new-object -comobject "Shell.Application"
$LogsDir = $Shell.Namespace($LogsDirPath)


Foreach ($FileName in $FileNamesToRemove)
{
  $Item = $LogsDir.ParseName($FileName)
  $Item.InvokeVerb("delete")
}