functions/Copy-SqlAudit.ps1

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Function Copy-SqlAudit
{
<#
.SYNOPSIS
Copy-SqlAudit migrates server audits from one SQL Server to another.
 
.DESCRIPTION
By default, all audits are copied. The -Audits parameter is autopopulated for command-line completion and can be used to copy only specific audits.
 
If the audit already exists on the destination, it will be skipped unless -Force is used.
 
.PARAMETER Source
Source SQL Server. You must have sysadmin access and server version must be SQL Server version 2000 or greater.
 
.PARAMETER Destination
Destination Sql Server. You must have sysadmin access and server version must be SQL Server version 2000 or greater.
 
.PARAMETER SourceSqlCredential
Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use:
 
$scred = Get-Credential, then pass $scred object to the -SourceSqlCredential parameter.
 
Windows Authentication will be used if DestinationSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
To connect as a different Windows user, run PowerShell as that user.
 
.PARAMETER DestinationSqlCredential
Allows you to login to servers using SQL Logins as opposed to Windows Auth/Integrated/Trusted. To use:
 
$dcred = Get-Credential, then pass this $dcred to the -DestinationSqlCredential parameter.
 
Windows Authentication will be used if DestinationSqlCredential is not specified. SQL Server does not accept Windows credentials being passed as credentials.
To connect as a different Windows user, run PowerShell as that user.
 
.PARAMETER WhatIf
Shows what would happen if the command were to run. No actions are actually performed.
 
.PARAMETER Confirm
Prompts you for confirmation before executing any changing operations within the command.
 
.PARAMETER Force
Drops and recreates the XXXXX if it exists
 
.NOTES
Author: Chrissy LeMaire (@cl), netnerds.net
Requires: sysadmin access on SQL Servers
 
dbatools PowerShell module (https://dbatools.io, clemaire@gmail.com)
Copyright (C) 2016 Chrissy LeMaire
 
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
 
.LINK
https://dbatools.io/Copy-SqlAudit
 
.EXAMPLE
Copy-SqlAudit -Source sqlserver2014a -Destination sqlcluster
 
Copies all server audits from sqlserver2014a to sqlcluster, using Windows credentials. If audits with the same name exist on sqlcluster, they will be skipped.
 
.EXAMPLE
Copy-SqlAudit -Source sqlserver2014a -Destination sqlcluster -Audit tg_noDbDrop -SourceSqlCredential $cred -Force
 
Copies a single audit, the tg_noDbDrop audit from sqlserver2014a to sqlcluster, using SQL credentials for sqlserver2014a and Windows credentials for sqlcluster. If an audit with the same name exists on sqlcluster, it will be dropped and recreated because -Force was used.
 
.EXAMPLE
Copy-SqlAudit -Source sqlserver2014a -Destination sqlcluster -WhatIf -Force
 
Shows what would happen if the command were executed using force.
#>

[CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess = $true)]
param (
[parameter(Mandatory = $true)]
[object]$Source,
[parameter(Mandatory = $true)]
[object]$Destination,
[System.Management.Automation.PSCredential]$SourceSqlCredential,
[System.Management.Automation.PSCredential]$DestinationSqlCredential,
[switch]$Force
)
DynamicParam { if ($source) { return (Get-ParamSqlServerAudits -SqlServer $Source -SqlCredential $SourceSqlCredential) } }

BEGIN {

$audits = $psboundparameters.Audits

$sourceserver = Connect-SqlServer -SqlServer $Source -SqlCredential $SourceSqlCredential
$destserver = Connect-SqlServer -SqlServer $Destination -SqlCredential $DestinationSqlCredential

$source = $sourceserver.DomainInstanceName
$destination = $destserver.DomainInstanceName

if ($sourceserver.versionMajor -lt 10 -or $destserver.versionMajor -lt 10)
{
throw "Server Audits are only supported in SQL Server 2008 and above. Quitting."

}

$serveraudits = $sourceserver.Audits
$destaudits = $destserver.Audits
}

PROCESS
{
foreach ($audit in $serveraudits)
{
$auditname = $audit.name
if ($audits.length -gt 0 -and $audits -notcontains $auditname)
{
continue
}

$sql = $audit.Script() | Out-String
$sql = $sql -replace [Regex]::Escape("'$source'"), [Regex]::Escape("'$destination'")

if ($destaudits.name -contains $auditname)
{
if ($force -eq $false)
{
Write-Warning "Server audit $auditname exists at destination. Use -Force to drop and migrate."
continue
}
else
{
If ($Pscmdlet.ShouldProcess($destination, "Dropping server audit $auditname"))
{
try
{
Write-Verbose "Dropping server audit $auditname"
foreach ($spec in $destserver.ServerAuditSpecifications)
{
if ($auditSpecification.Auditname -eq $auditname)
{
$auditSpecification.Drop()
}
}

$destserver.audits[$auditname].Disable()
$destserver.audits[$auditname].Alter()
$destserver.audits[$auditname].Drop()
}
catch { 
Write-Exception $_ 
}
}
}
}

if ((Test-SqlPath -SqlServer $destserver -Path $audit.Filepath) -eq $false)
{
if ($Force -eq $false)
{
Write-Warning "$($audit.Filepath) does not exist on $destination. Skipping $auditname."
Write-Warning "Specify -Force to create the directory"
continue
}
else
{
Write-Verbose "Force specified. Creating directory."

$destnetbios = Resolve-NetBiosName $destserver
$path = Join-AdminUnc $destnetbios $audit.Filepath
$root = $audit.Filepath.Substring(0, 3)
$rootunc = Join-AdminUnc $destnetbios $root

If ((Test-Path $rootunc) -eq $true)
{
try
{
If ($Pscmdlet.ShouldProcess($destination, "Creating directory $($audit.Filepath)"))
{
$null = New-Item -ItemType Directory $audit.Filepath -ErrorAction Continue
}
}
catch
{
Write-Output "Couldn't create diretory $($audit.Filepath). Using default data directory."
$datadir = Get-SqlDefaultPaths $destserver data
$sql = $sql.Replace($audit.FilePath, $datdir)
}
}
else
{
$datadir = Get-SqlDefaultPaths $destserver data
$sql = $sql.Replace($audit.FilePath, $datadir)
}
}
}
If ($Pscmdlet.ShouldProcess($destination, "Creating server audit $auditname"))
{
try
{
Write-Output "File path $($audit.Filepath) exists on $Destination."
Write-Output "Copying server audit $auditname"
$destserver.ConnectionContext.ExecuteNonQuery($sql) | Out-Null
}
catch
{
Write-Exception $_
}
}
}
}

END
{
$sourceserver.ConnectionContext.Disconnect()
$destserver.ConnectionContext.Disconnect()
If ($Pscmdlet.ShouldProcess("console", "Showing finished message")) { Write-Output "Server audit migration finished" }
}
}