DSCResources/DSC_SqlWaitForAG/DSC_SqlWaitForAG.psm1
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$script:sqlServerDscHelperModulePath = Join-Path -Path $PSScriptRoot -ChildPath '..\..\Modules\SqlServerDsc.Common' $script:resourceHelperModulePath = Join-Path -Path $PSScriptRoot -ChildPath '..\..\Modules\DscResource.Common' Import-Module -Name $script:sqlServerDscHelperModulePath Import-Module -Name $script:resourceHelperModulePath $script:localizedData = Get-LocalizedData -DefaultUICulture 'en-US' <# .SYNOPSIS Returns the cluster role/group that is waiting to be created, along with the time and number of times to wait. .PARAMETER ServerName Hostname of the SQL Server to be configured. .PARAMETER InstanceName Name of the SQL instance to be configured. .PARAMETER Name Name of the cluster role/group to look for (normally the same as the Availability Group name). .PARAMETER RetryIntervalSec The interval, in seconds, to check for the presence of the cluster role/group. Default value is 20 seconds. When the cluster role/group has been found the resource will check if the AG group exist. When the availability group has been found the resource will also wait this amount of time before returning. .PARAMETER RetryCount Maximum number of retries until the resource will timeout and throw an error. Default values is 30 times. #> function Get-TargetResource { [CmdletBinding()] [OutputType([System.Collections.Hashtable])] param ( [Parameter()] [ValidateNotNullOrEmpty()] [System.String] $ServerName = (Get-ComputerName), [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $InstanceName, [Parameter(Mandatory = $true)] [System.String] $Name, [Parameter()] [System.UInt64] $RetryIntervalSec = 20, [Parameter()] [System.UInt32] $RetryCount = 30 ) Write-Verbose -Message ( $script:localizedData.GetCurrentState -f $Name ) $clusterGroupFound = $false # No ClusterName specified, so defaults to cluster on this node. $clusterGroup = Get-ClusterGroup -Name $Name -ErrorAction SilentlyContinue if ($null -ne $clusterGroup) { Write-Verbose -Message ( $script:localizedData.FoundClusterGroup -f $Name ) # Connect to the instance $serverObject = Connect-SQL -ServerName $ServerName -InstanceName $InstanceName if ($serverObject) { # Determine if HADR is enabled on the instance. If not, AG group can not exist. if ($serverObject.IsHadrEnabled ) { $availabilityGroup = $serverObject.AvailabilityGroups[$Name] if ( $availabilityGroup ) { $clusterGroupFound = $true } else { Write-Verbose -Message ( $script:localizedData.AGNotFound -f $name, $InstanceName, $RetryIntervalSec ) } } else { Write-Verbose -Message ( $script:localizedData.HadrNotEnabled -f $InstanceName ) } } } else { Write-Verbose -Message ( $script:localizedData.MissingClusterGroup -f $Name ) } return @{ ServerName = $ServerName InstanceName = $InstanceName Name = $Name RetryIntervalSec = $RetryIntervalSec RetryCount = $RetryCount GroupExist = $clusterGroupFound } } <# .SYNOPSIS Waits for a cluster role/group to be created .PARAMETER ServerName Hostname of the SQL Server to be configured. .PARAMETER InstanceName Name of the SQL instance to be configured. .PARAMETER Name Name of the cluster role/group to look for (normally the same as the Availability Group name). .PARAMETER RetryIntervalSec The interval, in seconds, to check for the presence of the cluster role/group. Default value is 20 seconds. When the cluster role/group has been found the resource will check if the AG group exist. When the availability group has been found the resource will also wait this amount of time before returning. .PARAMETER RetryCount Maximum number of retries until the resource will timeout and throw an error. Default values is 30 times. #> function Set-TargetResource { [CmdletBinding()] param ( [Parameter()] [ValidateNotNullOrEmpty()] [System.String] $ServerName = (Get-ComputerName), [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $InstanceName, [Parameter(Mandatory = $true)] [System.String] $Name, [Parameter()] [System.UInt64] $RetryIntervalSec = 20, [Parameter()] [System.UInt32] $RetryCount = 30 ) Write-Verbose -Message ( $script:localizedData.WaitingClusterGroup -f $Name, $RetryCount, ($RetryIntervalSec * $RetryCount) ) $getTargetResourceParameters = @{ ServerName = $ServerName InstanceName = $InstanceName Name = $Name RetryIntervalSec = $RetryIntervalSec RetryCount = $RetryCount } for ($forLoopCount = 0; $forLoopCount -lt $RetryCount; $forLoopCount++) { $clusterGroupFound = (Get-TargetResource @getTargetResourceParameters).GroupExist if ($clusterGroupFound) { Write-Verbose -Message ( '{0} {1}' -f ` ($script:localizedData.FoundClusterGroup -f $Name, $RetryCount, ($RetryIntervalSec * $RetryCount)), ($script:localizedData.SleepMessage -f $RetryIntervalSec) ) Start-Sleep -Seconds $RetryIntervalSec break } Write-Verbose -Message ( '{0} {1}' -f ` ($script:localizedData.MissingClusterGroup -f $Name, $RetryCount, ($RetryIntervalSec * $RetryCount)), ($script:localizedData.RetryMessage -f $RetryIntervalSec) ) Start-Sleep -Seconds $RetryIntervalSec } if (-not $clusterGroupFound) { $errorMessage = $script:localizedData.FailedMessage -f $Name New-InvalidOperationException -Message $errorMessage } } <# .SYNOPSIS Tests if the cluster role/group has been created. .PARAMETER ServerName Hostname of the SQL Server to be configured. .PARAMETER InstanceName Name of the SQL instance to be configured. .PARAMETER Name Name of the cluster role/group to look for (normally the same as the Availability Group name). .PARAMETER RetryIntervalSec The interval, in seconds, to check for the presence of the cluster role/group. Default value is 20 seconds. When the cluster role/group has been found the resource will check if the AG group exist. When the availability group has been found the resource will also wait this amount of time before returning. .PARAMETER RetryCount Maximum number of retries until the resource will timeout and throw an error. Default values is 30 times. #> function Test-TargetResource { [CmdletBinding()] [OutputType([System.Boolean])] param ( [Parameter()] [ValidateNotNullOrEmpty()] [System.String] $ServerName = (Get-ComputerName), [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] [System.String] $InstanceName, [Parameter(Mandatory = $true)] [System.String] $Name, [Parameter()] [System.UInt64] $RetryIntervalSec = 20, [Parameter()] [System.UInt32] $RetryCount = 30 ) Write-Verbose -Message ( $script:localizedData.TestingConfiguration -f $Name ) $getTargetResourceParameters = @{ ServerName = $ServerName InstanceName = $InstanceName Name = $Name RetryIntervalSec = $RetryIntervalSec RetryCount = $RetryCount } $clusterGroupFound = (Get-TargetResource @getTargetResourceParameters).GroupExist if ($clusterGroupFound) { Write-Verbose -Message ( $script:localizedData.FoundClusterGroup -f $Name ) } else { Write-Verbose -Message ( $script:localizedData.MissingClusterGroup -f $Name ) } return $clusterGroupFound } |