functions/Invoke-DbaAgFailover.ps1
|
function Invoke-DbaAgFailover { <# .SYNOPSIS Failover an availability group. .DESCRIPTION Failover an availability group. .PARAMETER SqlInstance The SQL Server instance. 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 AvailabilityGroup Only failover specific availability groups. .PARAMETER InputObject Enables piping from Get-DbaAvailabilityGroup .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 Force Failover and allow data loss .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, Failover 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/Invoke-DbaAgFailover .EXAMPLE PS C:\> Invoke-DbaAgFailover -SqlInstance sql2017 -AvailabilityGroup SharePoint Safely (no potential data loss) fails over the SharePoint AG to sql2017. Prompts for confirmation. .EXAMPLE PS C:\> Get-DbaAvailabilityGroup -SqlInstance sql2017 | Out-GridView -Passthru | Invoke-DbaAgFailover -Confirm:$false Safely (no potential data loss) fails over the selected availability groups to sql2017. Does not prompt for confirmation. .EXAMPLE PS C:\> Invoke-DbaAgFailover -SqlInstance sql2017 -AvailabilityGroup SharePoint -Force Forcefully (with potential data loss) fails over the SharePoint AG to sql2017. Prompts for confirmation. #> [CmdletBinding(SupportsShouldProcess, ConfirmImpact = 'High')] param ( [parameter(Mandatory)] [DbaInstanceParameter[]]$SqlInstance, [PSCredential]$SqlCredential, [string[]]$AvailabilityGroup, [parameter(ValueFromPipeline)] [Microsoft.SqlServer.Management.Smo.AvailabilityGroup[]]$InputObject, [switch]$Force, [switch]$EnableException ) begin { if ($Force) {$ConfirmPreference = 'none'} } process { if ($SqlInstance -and -not $AvailabilityGroup) { Stop-Function -Message "You must specify at least one availability group when using SqlInstance." return } if ($SqlInstance) { $InputObject += Get-DbaAvailabilityGroup -SqlInstance $SqlInstance -SqlCredential $SqlCredential -AvailabilityGroup $AvailabilityGroup } foreach ($ag in $InputObject) { try { $server = $ag.Parent if ($Force) { if ($Pscmdlet.ShouldProcess($server.Name, "Forcefully failing over $($ag.Name), allowing potential data loss")) { $ag.FailoverWithPotentialDataLoss() $ag.Refresh() $ag } } else { if ($Pscmdlet.ShouldProcess($server.Name, "Gracefully failing over $($ag.Name)")) { $ag.Failover() $ag.Refresh() $ag } } } catch { Stop-Function -Continue -Message "Failure" -ErrorRecord $_ } } } } |