Powershell - Update web config file from all servers under farm

 

- Take back up of Existing Web Config

- Check if appSettings node is there then throw exception

- If property node is then delete it and recreate with new node.

 

Add-PSSnapin Microsoft.SharePoint.PowerShell
$serverInfo = get-spserver | ? { $_.Role -eq "Application" }
$serverInfo.Name
#$Folderpath = '\C$\Program Files\Common Files\Microsoft Shared\Web Server Extensions\15\WebServices\SecurityToken';
$Folderpath ='\C$\inetpub\wwwroot\wss\VirtualDirectories\'

$webappName = @("abc443\")
$PropertyName = @("HostName","PortNumber)
$PropertyValue = @("abc","636)

for($j=0 ; $j -lt $serverInfo.count ; $j++)
{
        write-host*****************************"  -foreground Green
        write-host " Server :  " + $serverInfo[$j].Name -foreground Green
        write-host "*************************************************" -foreground Green
  
    for($i=0 ; $i -lt $webappName.count ; $i++)
        { 
        $path = '\\'+$serverInfo[$j].Name + $Folderpath
        write-host $path
        $webConfig = $path+$webappName[$i]+'Web.config'
        write-host "Updatng Web Config for " + $webConfig
        if(Test-Path $webConfig -PathType Any)
        {
            $backup = $path+$webappName[$i]+ 'web_'+ (get-date).tostring("yyyy_MM_dd_hh_mm_ss")+'.bak';
            write-host "Taking Back up for Web Config "   +  $backup -foreground Green
            copy-item $webConfig -destination $backup

            for($k=0 ; $k -lt $PropertyName.count ; $k++)
                {
                Set-ApplicationSettingConfigProperty $webConfig $PropertyName[$k] $PropertyValue[$k] ;
                Function Set-ApplicationSettingConfigProperty
                {
                    param (
                        [parameter(Mandatory = $true)][ValidateScript ({Test-Path $_})][string] $PathToConfigFile,
                        [parameter(Mandatory = $true)][string] $PropertyName,
                        [parameter(Mandatory = $true)][string] $PropertyValue,
                        [Parameter(Mandatory = $false)][Validatescript ({(Get-Service $_) -ne $null})][string] $NameOfServiceToRestart = $null)
   

                    $configurationAppSettingXmlPath = "//configuration/appSettings"

                    [xml] $configurationDocument = Get-Content $PathToConfigFile
                    $appSettingsNode = $configurationDocument.SelectSingleNode($configurationAppSettingXmlPath)
   
                    if($appSettingsNode -eq $null)
                    {
                       # $(throw "App Settings Does not Exists! Invalid Configuration File.")
                       write-host "App Settings Does not Exists! Invalid Configuration File." -foreground red
                    }

                    $nodeToUpdate = $configurationDocument.SelectSingleNode($configurationAppSettingXmlPath+"/add[@key='$PropertyName']")
                    if($nodeToUpdate -ne $null)
                    {
                        Write-Host "[$PropertyName] Already exists, Removing it to re-set its value." -foreground red
                        $removedElement = $appSettingsNode.RemoveChild($nodeToUpdate)
                    }

                    Write-Host "Creating new Configuration Node." -foreground Green
                    $newPropertyNode = $configurationDocument.CreateNode("element", "add","")
                    $newPropertyNode.SetAttribute("key", $PropertyName)
                    $newPropertyNode.SetAttribute("value", $PropertyValue)
                    $appSettingsNode = $configurationDocument.SelectSingleNode($configurationAppSettingXmlPath).AppendChild($newPropertyNode)
                    Write-Host "Adding new property into the configuration file."  -foreground Green
                    $configurationDocument.Save($PathToConfigFile)
                    Write-Host "Property was Successfully Updated." -foreground Yellow
                    Write-Host "---------------------------------------------------------------------------" -foreground Yellow
                    Write-Host "---------------------------------------------------------------------------" -foreground Yellow

                    if([string]::IsNullOrWhiteSpace($NameOfServiceToRestart) -eq $false)
                    {
                        Write-Host "Service [$NameOfServiceToRestart] was defined.., Restarting it"
                        Restart-Service -Name $NameOfServiceToRestart
                        Write-Host "Service was Restarted..."
                    }
                }
            }
        }
    }
}