functions/Add-DbaAgReplica.ps1
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function Add-DbaAgReplica { <# .SYNOPSIS Adds a replica to an availability group on a SQL Server instance. .DESCRIPTION Adds a replica to an availability group on a SQL Server instance. Automatically creates a database mirroring endpoint if required. .PARAMETER SqlInstance The target SQL Server instance or instances. Server version must be SQL Server version 2012 or higher. .PARAMETER SqlCredential Login to the target instance using alternative credentials. Accepts PowerShell credentials (Get-Credential). Windows Authentication, SQL Server Authentication, Active Directory - Password, and Active Directory - Integrated are all supported. For MFA support, please use Connect-DbaInstance. .PARAMETER Name The name of the replica. Defaults to the SQL Server instance name. .PARAMETER AvailabilityMode Sets the availability mode of the availability group replica. Options are: AsynchronousCommit and SynchronousCommit. SynchronousCommit is default. .PARAMETER FailoverMode Sets the failover mode of the availability group replica. Options are Automatic and Manual. Automatic is default. .PARAMETER BackupPriority Sets the backup priority availability group replica. Default is 50. .PARAMETER Endpoint By default, this command will attempt to find a DatabaseMirror endpoint. If one does not exist, it will create it. If an endpoint must be created, the name "hadr_endpoint" will be used. If an alternative is preferred, use Endpoint. .PARAMETER Passthru Don't create the replica, just pass thru an object that can be further customized before creation. .PARAMETER InputObject Enables piping from Get-DbaAvailabilityGroup. .PARAMETER ConnectionModeInPrimaryRole Specifies the connection intent modes of an Availability Replica in primary role. AllowAllConnections by default. .PARAMETER ConnectionModeInSecondaryRole Specifies the connection modes of an Availability Replica in secondary role. AllowAllConnections by default. .PARAMETER ReadonlyRoutingConnectionUrl Sets the read only routing connection url for the availability replica. .PARAMETER SeedingMode Specifies how the secondary replica will be initially seeded. Automatic enables direct seeding. This method will seed the secondary replica over the network. This method does not require you to backup and restore a copy of the primary database on the replica. Manual requires you to create a backup of the database on the primary replica and manually restore that backup on the secondary replica. .PARAMETER Certificate Specifies that the endpoint is to authenticate the connection using the certificate specified by certificate_name to establish identity for authorization. The far endpoint must have a certificate with the public key matching the private key of the specified certificate. .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 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: AvailabilityGroup, HA, AG 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/Add-DbaAgReplica .EXAMPLE PS C:\> Get-DbaAvailabilityGroup -SqlInstance sql2017a -AvailabilityGroup SharePoint | Add-DbaAgReplica -SqlInstance sql2017b Adds sql2017b to the SharePoint availability group on sql2017a .EXAMPLE PS C:\> Get-DbaAvailabilityGroup -SqlInstance sql2017a -AvailabilityGroup SharePoint | Add-DbaAgReplica -SqlInstance sql2017b -FailoverMode Manual Adds sql2017b to the SharePoint availability group on sql2017a with a manual failover mode. #> [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'Low')] param ( [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [string]$Name, [ValidateSet('AsynchronousCommit', 'SynchronousCommit')] [string]$AvailabilityMode = "SynchronousCommit", [ValidateSet('Automatic', 'Manual', 'External')] [string]$FailoverMode = "Automatic", [int]$BackupPriority = 50, [ValidateSet('AllowAllConnections', 'AllowReadWriteConnections')] [string]$ConnectionModeInPrimaryRole = 'AllowAllConnections', [ValidateSet('AllowAllConnections', 'AllowNoConnections', 'AllowReadIntentConnectionsOnly')] [string]$ConnectionModeInSecondaryRole = 'AllowAllConnections', [ValidateSet('Automatic', 'Manual')] [string]$SeedingMode, [string]$Endpoint, [switch]$Passthru, [string]$ReadonlyRoutingConnectionUrl, [string]$Certificate, [parameter(ValueFromPipeline, Mandatory)] [Microsoft.SqlServer.Management.Smo.AvailabilityGroup]$InputObject, [switch]$EnableException ) process { if (Test-Bound -Not SqlInstance, InputObject) { Stop-Function -Message "You must supply either -SqlInstance or an Input Object" return } foreach ($instance in $SqlInstance) { try { $server = Connect-SqlInstance -SqlInstance $instance -SqlCredential $SqlCredential -MinimumVersion 11 } catch { Stop-Function -Message "Error occurred while establishing connection to $instance" -Category ConnectionError -ErrorRecord $_ -Target $instance -Continue } if ($Certificate) { $cert = Get-DbaDbCertificate -SqlInstance $server -Certificate $Certificate if (-not $cert) { Stop-Function -Message "Certificate $Certificate does not exist on $instance" -ErrorRecord $_ -Target $Certificate -Continue } } $ep = Get-DbaEndpoint -SqlInstance $server -Type DatabaseMirroring if (-not $ep) { if ($Pscmdlet.ShouldProcess($server.Name, "Adding endpoint named $Endpoint to $instance")) { if (-not $Endpoint) { $Endpoint = "hadr_endpoint" } $ep = New-DbaEndpoint -SqlInstance $server -Name hadr_endpoint -Type DatabaseMirroring -EndpointEncryption Supported -EncryptionAlgorithm Aes -Certificate $Certificate $null = $ep | Start-DbaEndpoint } } if ((Test-Bound -Not -ParameterName Name)) { $Name = $server.DomainInstanceName } if ($Pscmdlet.ShouldProcess($server.Name, "Creating a replica for $($InputObject.Name) named $Name")) { try { $replica = New-Object Microsoft.SqlServer.Management.Smo.AvailabilityReplica -ArgumentList $InputObject, $Name $replica.EndpointUrl = $ep.Fqdn $replica.FailoverMode = [Microsoft.SqlServer.Management.Smo.AvailabilityReplicaFailoverMode]::$FailoverMode $replica.AvailabilityMode = [Microsoft.SqlServer.Management.Smo.AvailabilityReplicaAvailabilityMode]::$AvailabilityMode if ($server.EngineEdition -ne "Standard") { $replica.ConnectionModeInPrimaryRole = [Microsoft.SqlServer.Management.Smo.AvailabilityReplicaConnectionModeInPrimaryRole]::$ConnectionModeInPrimaryRole $replica.ConnectionModeInSecondaryRole = [Microsoft.SqlServer.Management.Smo.AvailabilityReplicaConnectionModeInSecondaryRole]::$ConnectionModeInSecondaryRole } $replica.BackupPriority = $BackupPriority if ($ReadonlyRoutingConnectionUrl) { $replica.ReadonlyRoutingConnectionUrl = $ReadonlyRoutingConnectionUrl } if ($SeedingMode -and $server.VersionMajor -ge 13) { $replica.SeedingMode = $SeedingMode if ($SeedingMode -eq "Automatic") { $serviceaccount = $server.ServiceAccount.Trim() $saname = ([DbaInstanceParameter]($server.DomainInstanceName)).ComputerName if ($serviceaccount) { if ($serviceaccount.StartsWith("NT ")) { $serviceaccount = "$saname`$" } if ($serviceaccount.StartsWith("$saname")) { $serviceaccount = "$saname`$" } if ($serviceaccount.StartsWith(".")) { $serviceaccount = "$saname`$" } } if (-not $serviceaccount) { $serviceaccount = "$saname`$" } if ($server.HostPlatform -ne "Linux") { if ($Pscmdlet.ShouldProcess($second.Name, "Granting Connect permissions to service accounts: $serviceaccounts")) { $null = Grant-DbaAgPermission -SqlInstance $server -Type AvailabilityGroup -AvailabilityGroup $InputObject.Name -Login $serviceaccount -Permission CreateAnyDatabase $null = Grant-DbaAgPermission -SqlInstance $server -Login $serviceaccount -Type Endpoint -Permission Connect } } } } if ($Passthru) { return $replica } $defaults = 'ComputerName', 'InstanceName', 'SqlInstance', 'AvailabilityGroup', 'Name', 'Role', 'RollupSynchronizationState', 'AvailabilityMode', 'BackupPriority', 'EndpointUrl', 'SessionTimeout', 'FailoverMode', 'ReadonlyRoutingList' $InputObject.AvailabilityReplicas.Add($replica) $agreplica = $InputObject.AvailabilityReplicas[$Name] if ($InputObject.State -eq 'Existing') { Invoke-Create -Object $replica $null = Join-DbaAvailabilityGroup -SqlInstance $instance -SqlCredential $SqlCredential -AvailabilityGroup $InputObject.Name $agreplica.Alter() } Add-Member -Force -InputObject $agreplica -MemberType NoteProperty -Name ComputerName -value $agreplica.Parent.ComputerName Add-Member -Force -InputObject $agreplica -MemberType NoteProperty -Name InstanceName -value $agreplica.Parent.InstanceName Add-Member -Force -InputObject $agreplica -MemberType NoteProperty -Name SqlInstance -value $agreplica.Parent.SqlInstance Add-Member -Force -InputObject $agreplica -MemberType NoteProperty -Name AvailabilityGroup -value $agreplica.Parent.Name Add-Member -Force -InputObject $agreplica -MemberType NoteProperty -Name Replica -value $agreplica.Name # backwards compat Select-DefaultView -InputObject $agreplica -Property $defaults } catch { $msg = $_.Exception.InnerException.InnerException.Message if (-not $msg) { $msg = $_ } Stop-Function -Message $msg -ErrorRecord $_ -Continue } } } } } |