core/Copy-FilesToRemoteServer/New-CopySessions.ps1
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<#
The MIT License (MIT) Copyright (c) 2015 Objectivity Bespoke Software Specialists Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. #> function New-CopySessions { <# .SYNOPSIS Creates new PS sessions if they are needed (depending on hashes). Helper function for Copy-FilesToRemoteServer. .PARAMETER ConnectionParams Connection parameters created by [[New-ConnectionParameters]] function. .PARAMETER Destination The remote path where the file will be saved to. .PARAMETER Include List of file / directory to include. .PARAMETER IncludeRecurse Recurse type for Include rules (if set, wildcards will be matched recursively). .PARAMETER Exclude List of file / directory to exclude. .PARAMETER ExcludeRecurse Recurse type for Include rules (if set, wildcards will be matched recursively). .PARAMETER CheckHashMode There are three modes for checking whether the destination path needs to be updated: DontCheckHash - files are always uploaded to the servers AlwaysCalculateHash - files are uploaded to the servers if their hashes calculated in local path and in remote path are different UseHashFile - files are uploaded to the servers if there doesn't exist a syncHash_<hash> file, where hash is hash calculated in local path .PARAMETER HashPath Hash used when CheckHashMode != DontCheckHash. .EXAMPLE $sessions = New-CopySessions -ConnectionParams $ConnectionParams -Exclude $Exclude -Destination $Destination -CheckHashMode $CheckHashMode #> [CmdletBinding()] [OutputType([object[]])] param( [Parameter(Mandatory = $true)] [object] $ConnectionParams, [Parameter(Mandatory = $false)] [string[]] $Destination, [Parameter(Mandatory=$false)] [string[]] $Include, [Parameter(Mandatory=$false)] [switch] $IncludeRecurse, [Parameter(Mandatory=$false)] [string[]] $Exclude, [Parameter(Mandatory=$false)] [switch] $ExcludeRecurse, [Parameter(Mandatory = $false)] [string] [ValidateSet('DontCheckHash','AlwaysCalculateHash','UseHashFile')] $CheckHashMode = 'DontCheckHash', [Parameter(Mandatory = $false)] [string] $HashPath ) $result = @() # compare it with the hash of items on remote hosts $serverIndex = 1 foreach ($server in $ConnectionParams.Nodes) { # Initialize session with remote server $psSessionParams = $ConnectionParams.PSSessionParams.Clone() $psSessionParams.ComputerName = $server Write-Log -Info ('Connecting to {0}, {1}' -f $server, $ConnectionParams.OptionsAsString) $session = New-PsSession @psSessionParams $needUpdate = $true if ($CheckHashMode -eq 'AlwaysCalculateHash') { Invoke-Command -Session $session -ScriptBlock (Convert-FunctionToScriptBlock -FunctionName @('Get-FlatFileList', 'Get-Hash')) $remoteHash = Invoke-Command -Session $session -ScriptBlock { $destinations = $using:Destination foreach ($dest in $destinations) { if (!(Test-Path -LiteralPath $dest)) { return $null } } Get-Hash -Path $destinations -Include $Include -IncludeRecurse:$IncludeRecurse -Exclude $Exclude -ExcludeRecurse:$ExcludeRecurse } $needUpdate = $remoteHash -ne $HashPath } elseif ($CheckHashMode -eq 'UseHashFile' -and $HashPath) { $hashRemoteFilePath = Join-Path -Path $Destination[0] -ChildPath "syncHash_$HashPath" $hashFileExistsRemotely = Invoke-Command -Session $session -ScriptBlock { Test-Path -LiteralPath $using:hashRemoteFilePath } $needUpdate = !$hashFileExistsRemotely } if ($needUpdate) { if ($Destination) { $destinationDrive = ($Destination[0])[0] $psDriveParams = @{ Name = "PSCICopyDrive$serverIndex" PSProvider = 'FileSystem' Root = "\\$server\${destinationDrive}`$" Scope = 'Script' } if ($ConnectionParams.Credential) { $psDriveParams.Credential = $ConnectionParams.Credential } $psDrive = Get-PSDrive -LiteralName $psDriveParams.Name -PSProvider FileSystem -ErrorAction SilentlyContinue if ($psDrive -and ($psDrive.Root -ne $psDriveParams.Root -or $psDrive.Credential.UserName -ne $psDriveParams.Credential.UserName)) { Remove-PSDrive -LiteralName $psDriveParams.Name $psDrive = $null } if (!$psDrive) { # smb share is port 445 if (!(Test-Port -Hostname $server -Port 445)) { Write-Log -Warn "Port 445 is not open on $server - falling back to WinRM stream." } else { try { $psDrive = New-PSDrive @psDriveParams } catch { if ($_) { $err = $_.ToString() } else { $err = '' } Write-Log -Warn "Failed to create PSDrive $($psDriveParams.Root): $err - falling back to WinRM stream." } } } } # SuppressScriptCop - adding small arrays is ok $result += @{ PSSession = $session PSDrive = $psDrive } } else { Write-Log -Info "'$server' is up to date - no need to copy." Remove-PSSession -Session $session } $serverIndex++ } return $result } |