functions/Test-DbaServerName.ps1
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function Test-DbaServerName { <# .SYNOPSIS Tests to see if it's possible to easily rename the server at the SQL Server instance level, or if it even needs to be changed. .DESCRIPTION When a SQL Server's host OS is renamed, the SQL Server should be as well. This helps with Availability Groups and Kerberos. This command helps determine if your OS and SQL Server names match, and whether a rename is required. It then checks conditions that would prevent a rename, such as database mirroring and replication. https://www.mssqltips.com/sqlservertip/2525/steps-to-change-the-server-name-for-a-sql-server-machine/ .PARAMETER SqlInstance The SQL Server that you're connecting to. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential) .PARAMETER Detailed Output all properties, will be deprecated in 1.0.0 release. .PARAMETER ExcludeSsrs If this switch is enabled, checking for SQL Server Reporting Services will be skipped. .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: SPN, ServerName Author: Chrissy LeMaire (@cl), netnerds.net Website: https://dbatools.io Copyright: (c) 2018 by dbatools, licensed under MIT License: MIT https://opensource.org/licenses/MIT .LINK https://dbatools.io/Test-DbaServerName .EXAMPLE Test-DbaServerName -SqlInstance sqlserver2014a Returns ServerInstanceName, SqlServerName, IsEqual and RenameRequired for sqlserver2014a. .EXAMPLE Test-DbaServerName -SqlInstance sqlserver2014a, sql2016 Returns ServerInstanceName, SqlServerName, IsEqual and RenameRequired for sqlserver2014a and sql2016. .EXAMPLE Test-DbaServerName -SqlInstance sqlserver2014a, sql2016 -ExcludeSsrs Returns ServerInstanceName, SqlServerName, IsEqual and RenameRequired for sqlserver2014a and sql2016, but skips validating if SSRS is installed on both instances. .EXAMPLE Test-DbaServerName -SqlInstance sqlserver2014a, sql2016 | Select-Object * Returns ServerInstanceName, SqlServerName, IsEqual and RenameRequired for sqlserver2014a and sql2016. If a Rename is required, it will also show Updatable, and Reasons if the servername is not updatable. #> [CmdletBinding()] [OutputType([System.Collections.ArrayList])] param ( [parameter(Mandatory, ValueFromPipeline)] [Alias("ServerInstance", "SqlServer")] [DbaInstance[]]$SqlInstance, [PSCredential]$SqlCredential, [switch]$Detailed, [Alias("NoWarning")] [switch]$ExcludeSsrs, [Alias('Silent')] [switch]$EnableException ) begin { Test-DbaDeprecation -DeprecatedOn 1.0.0 -Parameter Detailed Test-DbaDeprecation -DeprecatedOn 1.0.0 -Parameter NoWarning } process { foreach ($instance in $SqlInstance) { Write-Verbose "Connecting to $instance" try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 9 } catch { Stop-Function -Message "Failure" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($server.IsClustered) { Write-Message -Level Warning -Message "$instance is a cluster. Renaming clusters is not supported by Microsoft." } $sqlInstanceName = $server.Query("SELECT @@servername AS ServerName").ServerName $instance = $server.InstanceName if ($instance.Length -eq 0) { $serverInstanceName = $server.NetName $instance = "MSSQLSERVER" } else { $netname = $server.NetName $serverInstanceName = "$netname\$instance" } $serverInfo = [PSCustomObject]@{ ComputerName = $server.NetName ServerName = $sqlInstanceName InstanceName = $server.ServiceName SqlInstance = $server.DomainInstanceName RenameRequired = $serverInstanceName -ne $sqlInstanceName Updatable = "N/A" Warnings = $null Blockers = $null } $reasons = @() $ssrsService = "SQL Server Reporting Services ($instance)" Write-Message -Level Verbose -Message "Checking for $serverName on $netBiosName" $rs = $null if ($SkipSsrs -eq $false -or $NoWarning -eq $false) { try { $rs = Get-DbaService -ComputerName $instance.ComputerName -InstanceName $server.ServiceName -Type SSRS -EnableException -WarningAction Stop } catch { Write-Message -Level Warning -Message "Unable to pull information on $ssrsService." -ErrorRecord $_ -Target $instance } } if ($null -ne $rs -or $rs.Count -gt 0) { if ($rs.State -eq 'Running') { $rstext = "$ssrsService must be stopped and updated." } else { $rstext = "$ssrsService exists. When it is started again, it must be updated." } $serverInfo.Warnings = $rstext } else { $serverInfo.Warnings = "N/A" } # check for mirroring $mirroredDb = $server.Databases | Where-Object { $_.IsMirroringEnabled -eq $true } Write-Message -Level Debug -Message "Found the following mirrored dbs: $($mirroredDb.Name)" if ($mirroredDb.Length -gt 0) { $dbs = $mirroredDb.Name -join ", " $reasons += "Databases are being mirrored: $dbs" } # check for replication $sql = "SELECT name FROM sys.databases WHERE is_published = 1 OR is_subscribed = 1 OR is_distributor = 1" Write-Message -Level Debug -Message "SQL Statement: $sql" $replicatedDb = $server.Query($sql) if ($replicatedDb.Count -gt 0) { $dbs = $replicatedDb.Name -join ", " $reasons += "Database(s) are involved in replication: $dbs" } # check for even more replication $sql = "SELECT srl.remote_name as RemoteLoginName FROM sys.remote_logins srl JOIN sys.sysservers sss ON srl.server_id = sss.srvid" Write-Message -Level Debug -Message "SQL Statement: $sql" $results = $server.Query($sql) if ($results.RemoteLoginName.Count -gt 0) { $remoteLogins = $results.RemoteLoginName -join ", " $reasons += "Remote logins still exist: $remoteLogins" } if ($reasons.Length -gt 0) { $serverInfo.Updatable = $false $serverInfo.Blockers = $reasons } else { $serverInfo.Updatable = $true $serverInfo.Blockers = "N/A" } $serverInfo | Select-DefaultView -ExcludeProperty InstanceName, SqlInstance } } } |