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initial checkin, work in progress still
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‎AG - post-zerto failover.ps1

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#https://docs.microsoft.com/en-us/sql/sql-server/failover-clusters/windows/change-the-ip-address-of-a-failover-cluster-instance?view=sql-server-2017
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#https://docs.microsoft.com/en-us/powershell/module/failoverclusters/set-clusterparameter?view=win10-ps
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#TODO: Uncomment Set-ClusterParameter commands for safety.
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#This is for N01
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#For N02, change the first two variable names below, $Server_IP_Prod and $Server_IP_DR
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#Post-Zerto failover script for handling changes to Availability Groups.
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#WORK IN PROGRESS. May need to be adjusted for your environment.
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#You may want to change these variables to "_DC1" and "_DC2"
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$Server_IP_Prod = "10.0.3.179"
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$Server_IP_DR = "10.35.135.161"
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$Cluster_IP_Prod = "10.0.3.181"
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$Cluster_IP_DR = "10.35.135.163"
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$Listener_IP_Prod = "10.0.3.182"
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$Listener_IP_DR = "10.35.135.164"
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$cluster_resource_name  = "Cluster IP Address" #not from Failover Cluster Manager or SQL, but from the Get-ClusterResource cmdlet. Usually "Cluster IP Address"
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#$listener_name = "GSFSQASCS_172.20.63.21" #not from Failover Cluster Manager or SQL, but from the Get-ClusterResource cmdlet. USually it's "AGname_IPAddress"
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#not from Failover Cluster Manager or SQL, but from the Get-ClusterResource cmdlet. Usually "Cluster IP Address"
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$cluster_resource_name  = "Cluster IP Address"
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#Get the listener object name, which changes. Follows this pattern: "AGNAME_ListenerIP", example, SCRSQL_10.0.3.182
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$listener_resource_name  = Get-ClusterResource -Name "SCRSQL_*" | Where-Object -FilterScript { $_.ResourceType -contains "IP Address" } | Select-Object Name
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#Name of the AG, which we'll attempt to start at the end.
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$AG_resource_name = "SCRSQL"
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#Figure out where we are right now.
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$Current_Cluster_ipaddress = get-clusterresource -Name "Cluster IP Address" | Get-ClusterParameter -Name "Address" | Select-Object Value
@@ -32,67 +32,93 @@ ElseIf ($currentIP -match $Server_IP_DR -and $Current_Cluster_ipaddress -match $
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{
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#We've failed over to DR. The Server's IP has been updated, but the Cluster hasn't yet.
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import-module sqlps
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#Add new IP for xerto destination to AG Listener before the failover
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#this next step should only need to be done once.
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Add-SqlAvailabilityGroupListenerStaticIp -Path "SQLSERVER:\SQL\localhost\DEFAULT\AvailabilityGroups\SCRSQL\AvailabilityGroupListeners\scrsqlp01vip" -StaticIp "10.35.135.164/255.255.255.0" -Script
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#Verify
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Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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#Change Cluster IP.
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#Verify step if running manually. Comment out if automated.
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#Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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$new_ip = $Cluster_IP_DR
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$Current_IP_Cluster_Resource_Name  = Get-ClusterResource -Name $cluster_resource_name
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#Subnet mask will not change after the Xerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after xerto failover
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#Subnet mask will not change after the Zerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after Zerto failover
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$parameter1 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,Address,$new_ip
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#Subnet mask will not change after the Zerto failover
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#$parameter2 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,SubnetMask,$new_subnet_mask
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$parameters = $parameter1 #,$parameter2
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#Change the IPs.
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$parameters | Set-ClusterParameter
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#This step would happen once after the changes
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Stop-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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#Change AG Listener IP.
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#Verify step if running manually. Comment out if automated.
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#Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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$new_ip = $Listener_IP_DR
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$Current_IP_Cluster_Resource_Name  = Get-ClusterResource -Name $listener_resource_name
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#Subnet mask will not change after the Zerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after Zerto failover
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$parameter1 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,Address,$new_ip
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#Subnet mask will not change after the Xerto failover
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#Subnet mask will not change after the Zerto failover
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#$parameter2 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,SubnetMask,$new_subnet_mask
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$parameters = $parameter1 #,$parameter2
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#Change the IPs
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#Uncomment the below line to actually have an impact! Commented for safety.
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$parameters #| Set-ClusterParameter
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#Change the IPs.
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$parameters | Set-ClusterParameter 
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#This step would happen once after the changes
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#Make the change happen
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Stop-ClusterResource $cluster_resource_name
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Start-ClusterResource $cluster_resource_name
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Stop-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $AG_resource_name
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}
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ElseIf ($currentIP -match $Server_IP_Prod -and $Current_Cluster_ipaddress -match $Cluster_IP_DR )
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{
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#We've failed back to PROD. The Server's IP has been updated, but the Cluster hasn't yet.
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#Verify
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Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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$new_ip = $Cluster_IP_DR
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#Change Cluster IP.
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#Verify step if running manually. Comment out if automated.
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#Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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$new_ip = $Cluster_IP_Prod
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$Current_IP_Cluster_Resource_Name  = Get-ClusterResource -Name $cluster_resource_name
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#Subnet mask will not change after the Xerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after xerto failover
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#Subnet mask will not change after the Zerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after Zerto failover
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$parameter1 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,Address,$new_ip
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#Subnet mask will not change after the Xerto failover
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#Subnet mask will not change after the Zerto failover
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#$parameter2 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,SubnetMask,$new_subnet_mask
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$parameters = $parameter1 #,$parameter2
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#Change the IPs
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#Uncomment the below line to actually have an impact! Commented for safety.
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$parameters #| Set-ClusterParameter
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#Change the IPs.
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$parameters | Set-ClusterParameter
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#This step would happen once after the changes
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Stop-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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#Change AG Listener IP.
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#Verify step if running manually. Comment out if automated.
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#Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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$new_ip = $Listener_IP_Prod
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$Current_IP_Cluster_Resource_Name  = Get-ClusterResource -Name $listener_resource_name
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#Subnet mask will not change after the Zerto failover
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#$new_subnet_mask = "255.255.255.0" #need to determine this info after Zerto failover
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$parameter1 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,Address,$new_ip
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#Subnet mask will not change after the Zerto failover
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#$parameter2 = New-Object Microsoft.FailoverClusters.PowerShell.ClusterParameter $Current_IP_Cluster_Resource_Name,SubnetMask,$new_subnet_mask
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$parameters = $parameter1 #,$parameter2
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#Change the IPs.
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$parameters | Set-ClusterParameter 
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#This step would happen once after the changes
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#Make the change happen
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Stop-ClusterResource $cluster_resource_name
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Start-ClusterResource $cluster_resource_name
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Stop-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $cluster_resource_name -ErrorAction SilentlyContinue
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Start-ClusterResource $AG_resource_name
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}
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#Verify
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Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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#Verify step if running manually. Comment out if automated.
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#Get-ClusterResource $cluster_resource_name | Get-ClusterParameter
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#This next block doesn't work if the AG can't come online. Leaving it here for future reference only.
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#import-module sqlps
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#Add new IP for Zerto destination to AG Listener before the failover
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#this next step should only need to be done once.
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#Add-SqlAvailabilityGroupListenerStaticIp -Path "SQLSERVER:\SQL\localhost\DEFAULT\AvailabilityGroups\SCRSQL\AvailabilityGroupListeners\scrsqlp01vip" -StaticIp "10.35.135.164/255.255.255.0" -Script
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