functions/Copy-DbaLinkedServer.ps1
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 |
function Copy-DbaLinkedServer { <# .SYNOPSIS Copy-DbaLinkedServer migrates Linked Servers from one SQL Server to another. Linked Server logins and passwords are migrated as well. .DESCRIPTION By using password decryption techniques provided by Antti Rantasaari (NetSPI, 2014), this script migrates SQL Server Linked Servers from one server to another, while maintaining username and password. Credit: https://blog.netspi.com/decrypting-mssql-database-link-server-passwords/ License: BSD 3-Clause http://opensource.org/licenses/BSD-3-Clause .PARAMETER Source Source SQL Server (2005 and above). You must have sysadmin access to both SQL Server and Windows. .PARAMETER SourceSqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER Destination Destination SQL Server (2005 and above). You must have sysadmin access to both SQL Server and Windows. .PARAMETER DestinationSqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER LinkedServer The linked server(s) to process - this list is auto-populated from the server. If unspecified, all linked servers will be processed. .PARAMETER ExcludeLinkedServer The linked server(s) to exclude - this list is auto-populated from the server .PARAMETER UpgradeSqlClient Upgrade any SqlClient Linked Server to the current Version .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 By default, if a Linked Server exists on the source and destination, the Linked Server is not copied over. Specifying -force will drop and recreate the Linked Server on the Destination server. .PARAMETER EnableException By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message. This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting. Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch. .NOTES Tags: WSMan, Migration, LinkedServer Author: Chrissy LeMaire (@cl), netnerds.net Requires: sysadmin access on SQL Servers, Remote Registry & Remote Administration enabled and accessible on source server. Limitations: Hasn't been tested thoroughly. Works on Win8.1 and SQL Server 2012 & 2014 so far. This just copies the SQL portion. It does not copy files (ie. a local SQLite database, or Microsoft Access DB), nor does it configure ODBC entries. .LINK https://dbatools.io/Copy-DbaLinkedServer .EXAMPLE Copy-DbaLinkedServer -Source sqlserver2014a -Destination sqlcluster Description Copies all SQL Server Linked Servers on sqlserver2014a to sqlcluster. If Linked Server exists on destination, it will be skipped. .EXAMPLE Copy-DbaLinkedServer -Source sqlserver2014a -Destination sqlcluster -LinkedServer SQL2K5,SQL2k -Force Description Copies over two SQL Server Linked Servers (SQL2K and SQL2K2) from sqlserver to sqlcluster. If the credential already exists on the destination, it will be dropped. #> [CmdletBinding(DefaultParameterSetName = "Default", SupportsShouldProcess = $true)] Param ( [parameter(Mandatory = $true)] [DbaInstanceParameter]$Source, [PSCredential]$SourceSqlCredential, [parameter(Mandatory = $true)] [DbaInstanceParameter]$Destination, [PSCredential]$DestinationSqlCredential, [object[]]$LinkedServer, [object[]]$ExcludeLinkedServer, [switch]$UpgradeSqlClient, [switch]$Force, [Alias('Silent')] [switch]$EnableException ) begin { $null = Test-ElevationRequirement -ComputerName $Source.ComputerName function Get-LinkedServerLogins { <# .SYNOPSIS Internal function. This function is heavily based on Antti Rantasaari's script at http://goo.gl/wpqSib Antti Rantasaari 2014, NetSPI License: BSD 3-Clause http://opensource.org/licenses/BSD-3-Clause #> param ( $SqlInstance ) $server = $SqlInstance $sourceName = $server.Name # Query Service Master Key from the database - remove padding from the key # key_id 102 eq service master key, thumbprint 3 means encrypted with machinekey $sql = "SELECT substring(crypt_property,9,len(crypt_property)-8) as smk FROM sys.key_encryptions WHERE key_id=102 and (thumbprint=0x03 or thumbprint=0x0300000001)" try { $smkbytes = $server.Query($sql).smk } catch { Stop-Function -Message "Can't run query." -Target $server -InnerErrorRecord $_ return } $sourceNetBios = Resolve-NetBiosName $server $instance = $server.InstanceName $serviceInstanceId = $server.ServiceInstanceId # Get entropy from the registry - hopefully finds the right SQL server instance try { [byte[]]$entropy = Invoke-Command2 -Raw -Credential $Credential -ComputerName $sourceNetBios -argumentlist $serviceInstanceId { $serviceInstanceId = $args[0] $entropy = (Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Microsoft SQL Server\$serviceInstanceId\Security\").Entropy return $entropy } } catch { Stop-Function -Message "Can't access registry keys on $sourceName. Quitting." -Target $server ErrorRecord $_ return } # Decrypt the service master key try { $serviceKey = Invoke-Command2 -Raw -Credential $Credential -ComputerName $sourceNetBios -ArgumentList $smkbytes, $Entropy { Add-Type -assembly System.Security Add-Type -assembly System.Core $smkbytes = $args[0]; $Entropy = $args[1] $serviceKey = [System.Security.Cryptography.ProtectedData]::Unprotect($smkbytes, $Entropy, 'LocalMachine') return $serviceKey } } catch { Stop-Function -Message "Can't unprotect registry data on $($source.Name)). Quitting." -Target $server -InnerErrorRecord $_ return } # Choose the encryption algorithm based on the SMK length - 3DES for 2008, AES for 2012 # Choose IV length based on the algorithm if (($serviceKey.Length -ne 16) -and ($serviceKey.Length -ne 32)) { Write-Message -Level Verbose -Message "ServiceKey found: $serviceKey.Length" Stop-Function -Message "Unknown key size. Cannot continue." -Target $source return } if ($serviceKey.Length -eq 16) { $decryptor = New-Object System.Security.Cryptography.TripleDESCryptoServiceProvider $ivlen = 8 } elseif ($serviceKey.Length -eq 32) { $decryptor = New-Object System.Security.Cryptography.AESCryptoServiceProvider $ivlen = 16 } <# Query link server password information from the Db. Remove header from pwdhash, extract IV (as iv) and ciphertext (as pass) Ignore links with blank credentials (integrated auth ?) #> if ($server.IsClustered -eq $false) { $connString = "Server=ADMIN:$sourceNetBios\$instance;Trusted_Connection=True" } else { $dacEnabled = $server.Configuration.RemoteDacConnectionsEnabled.ConfigValue if ($dacEnabled -eq $false) { If ($Pscmdlet.ShouldProcess($server.Name, "Enabling DAC on clustered instance.")) { Write-Message -Level Verbose -Message "DAC must be enabled for clusters, even when accessed from active node. Enabling." $server.Configuration.RemoteDacConnectionsEnabled.ConfigValue = $true $server.Configuration.Alter() } } $connString = "Server=ADMIN:$sourceName;Trusted_Connection=True" } <# NOTE: This query is accessing syslnklgns table. Can only be done via the DAC connection #> $sql = " SELECT sysservers.srvname, syslnklgns.Name, substring(syslnklgns.pwdhash,5,$ivlen) iv, substring(syslnklgns.pwdhash,$($ivlen + 5), len(syslnklgns.pwdhash)-$($ivlen + 4)) pass FROM master.sys.syslnklgns inner join master.sys.sysservers on syslnklgns.srvid=sysservers.srvid WHERE len(pwdhash) > 0" # Get entropy from the registry try { $logins = Invoke-Command2 -Raw -Credential $Credential -ComputerName $sourceNetBios -ArgumentList $connString, $sql { $connString = $args[0]; $sql = $args[1] $conn = New-Object System.Data.SqlClient.SQLConnection($connString) $conn.open() $cmd = New-Object System.Data.SqlClient.SqlCommand($sql, $conn); $data = $cmd.ExecuteReader() $dt = New-Object "System.Data.DataTable" $dt.Load($data) $conn.Close() $conn.Dispose() return $dt } } catch { Stop-Function -Message "Can't establish local DAC connection." -Target $server -InnerErrorRecord $_ return } if ($server.IsClustered -and $dacEnabled -eq $false) { If ($Pscmdlet.ShouldProcess($server.Name, "Disabling DAC on clustered instance.")) { Write-Message -Level Verbose -Message "Setting DAC config back to 0." $server.Configuration.RemoteDacConnectionsEnabled.ConfigValue = $false $server.Configuration.Alter() } } $decryptedLogins = New-Object "System.Data.DataTable" [void]$decryptedLogins.Columns.Add("LinkedServer") [void]$decryptedLogins.Columns.Add("Login") [void]$decryptedLogins.Columns.Add("Password") # Go through each row in results foreach ($login in $logins) { # decrypt the password using the service master key and the extracted IV $decryptor.Padding = "None" $decrypt = $decryptor.Createdecryptor($serviceKey, $login.iv) $stream = New-Object System.IO.MemoryStream ( , $login.pass) $crypto = New-Object System.Security.Cryptography.CryptoStream $stream, $decrypt, "Write" $crypto.Write($login.pass, 0, $login.pass.Length) [byte[]]$decrypted = $stream.ToArray() # convert decrypted password to unicode $encode = New-Object System.Text.UnicodeEncoding # Print results - removing the weird padding (8 bytes in the front, some bytes at the end)... # Might cause problems but so far seems to work.. may be dependant on SQL server version... # If problems arise remove the next three lines.. $i = 8; foreach ($b in $decrypted) {if ($decrypted[$i] -ne 0 -and $decrypted[$i + 1] -ne 0 -or $i -eq $decrypted.Length) { $i -= 1; break; }; $i += 1; } $decrypted = $decrypted[8..$i] [void]$decryptedLogins.Rows.Add($($login.srvname), $($login.Name), $($encode.GetString($decrypted))) } return $decryptedLogins } function Copy-DbaLinkedServers { param ( [string[]]$LinkedServer, [bool]$force ) Write-Message -Level Verbose -Message "Collecting Linked Server logins and passwords on $($sourceServer.Name)." $sourcelogins = Get-LinkedServerLogins $sourceServer $serverlist = $sourceServer.LinkedServers if ($LinkedServer) { $serverlist = $serverlist | Where-Object Name -In $LinkedServer } if ($ExcludeLinkedServer) { $serverList = $serverlist | Where-Object Name -NotIn $ExcludeLinkedServer } foreach ($currentLinkedServer in $serverlist) { $provider = $currentLinkedServer.ProviderName try { $destServer.LinkedServers.Refresh() $destServer.LinkedServers.LinkedServerLogins.Refresh() } catch { } $linkedServerName = $currentLinkedServer.Name $copyLinkedServer = [pscustomobject]@{ SourceServer = $sourceServer.Name DestinationServer = $destServer.Name Name = $linkedServerName Type = "Linked Server" Status = $null Notes = $provider DateTime = [DbaDateTime](Get-Date) } # This does a check to warn of missing OleDbProviderSettings but should only be checked on SQL on Windows if ($destServer.Settings.OleDbProviderSettings.Name.Length -ne 0) { if (!$destServer.Settings.OleDbProviderSettings.Name -contains $provider -and !$provider.StartsWith("SQLN")) { $copyLinkedServer.Status = "Skipped" $copyLinkedServer.Notes = "Missing provider" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject Write-Message -Level Verbose -Message "$($destServer.Name) does not support the $provider provider. Skipping $linkedServerName." continue } } if ($null -ne $destServer.LinkedServers[$linkedServerName]) { if (!$force) { $copyLinkedServer.Status = "Skipped" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject Write-Message -Level Verbose -Message "$linkedServerName exists $($destServer.Name). Skipping." continue } else { if ($Pscmdlet.ShouldProcess($destination, "Dropping $linkedServerName")) { if ($currentLinkedServer.Name -eq 'repl_distributor') { Write-Message -Level Verbose -Message "repl_distributor cannot be dropped. Not going to try." continue } $destServer.LinkedServers[$linkedServerName].Drop($true) $destServer.LinkedServers.refresh() } } } Write-Message -Level Verbose -Message "Attempting to migrate: $linkedServerName." If ($Pscmdlet.ShouldProcess($destination, "Migrating $linkedServerName")) { try { $sql = $currentLinkedServer.Script() | Out-String Write-Message -Level Debug -Message $sql if ($UpgradeSqlClient -and $sql -match "sqlncli") { $destProviders = $destServer.Settings.OleDbProviderSettings | Where-Object { $_.Name -like 'SQLNCLI*' } $newProvider = $destProviders | Sort-Object Name -Descending | Select-Object -First 1 -ExpandProperty Name Write-Message -Level Verbose -Message "Changing sqlncli to $newProvider" $sql = $sql -replace ("sqlncli[0-9]+", $newProvider) } $destServer.Query($sql) $destServer.LinkedServers.Refresh() Write-Message -Level Verbose -Message "$linkedServerName successfully copied." $copyLinkedServer.Status = "Successful" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject } catch { $copyLinkedServer.Status = "Failed" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject Stop-Function -Message "Issue adding linked server $destServer." -Target $linkedServerName -InnerErrorRecord $_ $skiplogins = $true } } if ($skiplogins -ne $true) { $destlogins = $destServer.LinkedServers[$linkedServerName].LinkedServerLogins $lslogins = $sourcelogins | Where-Object { $_.LinkedServer -eq $linkedServerName } foreach ($login in $lslogins) { if ($Pscmdlet.ShouldProcess($destination, "Migrating $($login.Login)")) { $currentlogin = $destlogins | Where-Object { $_.RemoteUser -eq $login.Login } $copyLinkedServer.Type = $login.Login if ($currentlogin.RemoteUser.length -ne 0) { try { $currentlogin.SetRemotePassword($login.Password) $currentlogin.Alter() $copyLinkedServer.Status = "Successful" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject } catch { $copyLinkedServer.Status = "Failed" $copyLinkedServer | Select-DefaultView -Property DateTime, SourceServer, DestinationServer, Name, Type, Status, Notes -TypeName MigrationObject Stop-Function -Message "Failed to copy login." -Target $login -InnerErrorRecord $_ } } } } } } } } process { if (Test-FunctionInterrupt) { return } if ($null -ne $SourceSqlCredential.username) { Write-Message -Level Verbose -Message "You are using a SQL Credential. Note that this script requires Windows Administrator access on the source server. Attempting with $($SourceSqlCredential.Username)." } $sourceServer = Connect-SqlInstance -SqlInstance $Source -SqlCredential $SourceSqlCredential $destServer = Connect-SqlInstance -SqlInstance $Destination -SqlCredential $DestinationSqlCredential $source = $sourceServer.Name $destination = $destServer.Name if (!(Test-SqlSa -SqlInstance $sourceServer -SqlCredential $SourceSqlCredential)) { Stop-Function -Message "Not a sysadmin on $source. Quitting." -Target $sourceServer return } if (!(Test-SqlSa -SqlInstance $destServer -SqlCredential $DestinationSqlCredential)) { Stop-Function -Message "Not a sysadmin on $destination. Quitting." -Target $destServer return } Write-Message -Level Verbose -Message "Getting NetBios name for $source." $sourceNetBios = Resolve-NetBiosName $sourceserver Write-Message -Level Verbose -Message "Checking if Remote Registry is enabled on $source." try { Invoke-Command2 -Raw -Credential $Credential -ComputerName $sourceNetBios -ScriptBlock { Get-ItemProperty -Path "HKLM:\SOFTWARE\" } -ErrorAction Stop } catch { Stop-Function -Message "Can't connect to registry on $source." -Target $sourceNetBios -ErrorRecord $_ return } # Magic happens here Copy-DbaLinkedServers $LinkedServer -Force:$force } end { Test-DbaDeprecation -DeprecatedOn "1.0.0" -EnableException:$false -Alias Copy-SqlLinkedServer } } |