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PS script for an E2E example of T-SQL Snapshot Backup on an Azure VM
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Perry Skountrianos
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# Graph Tables
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This code sample demonstrates how to populate graph tables from an existing table or a csv files. It provides a couple of examples as well.
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### Contents
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[About this sample](#about-this-sample)<br/>
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[Before you begin](#before-you-begin)<br/>
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[Run this sample](#run-this-sample)<br/>
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[Sample details](#sample-details)<br/>
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[Disclaimers](#disclaimers)<br/>
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[Related links](#related-links)<br/>
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<a name=about-this-sample></a>
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## About this sample
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1. **Applies to:**
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- SQL Server 2022 (or higher) Evaluation / Developer / Enterprise editions.
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2. **Key feature:**
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- Create a T-SQL snapshot backup
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- Restore Databse from the snapshot backup
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3. **Programming Language:** PowerShell. T-SQL
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5. **Authors:** Perry Skountrianos [perryskou-msft]
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<a name=before-you-begin></a>
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## Before you begin
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Coming soon...
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## Run this sample
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Coming soon...
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<a name=disclaimers></a>
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## Disclaimers
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The code included in this sample is not intended to be a set of best practices on how to build scalable enterprise grade applications. This is beyond the scope of this quick start sample.
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<a name=related-links></a>
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$subscriptionId ='########-####-####-####-############'
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$subscriptionName = 'YOUR-AZURE-SUBSCRIPTION-NAME'
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$resourceGroupName = 'YOUR-AZURE-RESOURCE-GROUP-NAME'
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$location = 'YOUR-AZURE-RESOURCE-GROUP-LOCATION'
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$vmName = 'YOUR-VIRTUAL-MACHINE-NAME'
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$snapshotName = 'SNAPSHOT-NAME'
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$diskName = "YOUR-SNAPSHOT-BACKUP-NAME"
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$storageType = '' # E.g., 'Premium_LRS'
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$bkmFile = "FILEPATH-FOR-THE-.BKM-FILE" # E.g., "C:\BKP\db.bkm"
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$SQLServer = "YOUR-SQL-SERVER-INSTANCE-NAME"
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$db = "YOUR-DATABASE-NAME"
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$suspendDb = "ALTER DATABASE [" + $db +"] SET SUSPEND_FOR_SNAPSHOT_BACKUP ON;"
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$backupMetadata = "BACKUP DATABASE [" + $db +"] TO DISK='" + $bkmfile + "' WITH SNAPSHOT, FORMAT;"
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$unsuspendDb = "ALTER DATABASE [" + $db + "] SET SUSPEND_FOR_SNAPSHOT_BACKUP OFF;"
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$createDB="IF NOT EXISTS(SELECT * FROM sys.databases WHERE name = '" + $db + "') CREATE DATABASE " + $db
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$dropDB="IF EXISTS(SELECT * FROM sys.databases WHERE name = '" + $db + "') BEGIN ALTER DATABASE [" + $db +"] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;DROP DATABASE " + $db + " END"
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$mdfFile = "F:\Program Files\Microsoft SQL Server\MSSQL16.MSSQLSERVER\MSSQL\DATA\" + $db +".mdf"
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$ldfFile = "F:\Program Files\Microsoft SQL Server\MSSQL16.MSSQLSERVER\MSSQL\DATA\" + $db +"_log.ldf"
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$restoreDB = "RESTORE DATABASE [" + $db +"] FROM DISK='" + $bkmFile + "' WITH SNAPSHOT, MOVE '" + $db +"' TO '" + $mdfFile + "', MOVE '" + $db +"_log' TO '" + $ldfFile + "';"
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# Login and set the Azure subscription
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###########################################
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az login
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Connect-AzAccount
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Select-AzSubscription -SubscriptionId $subscriptionId
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az account set --subscription $subscriptionName
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# Import Modules
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###########################################
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Import-Module -Name SQLPS
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Install-Module -Name Az
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# Create a sample database
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###########################################
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$sqlConn = New-Object System.Data.SQLClient.SQLConnection
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# Open SQL Server connection to master
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$sqlConn.ConnectionString = "server='" + $SQLServer +"';database='master';Integrated Security=True;"
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$sqlConn.Open()
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$Command = New-Object System.Data.SQLClient.SQLCommand
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$Command.Connection = $sqlConn
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# Create Database
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$Command.CommandText = $createDB
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$Result = $Command.ExecuteNonQuery();
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# Close SQL Server connection
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$sqlConn.Close()
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# Take a snapshot backup
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###########################################
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$sqlConn.ConnectionString = "server='" + $SQLServer +"';database='" + $db +"';Integrated Security=True;"
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# Open SQL Server connection
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$sqlConn.Open()
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$Command = New-Object System.Data.SQLClient.SQLCommand
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$Command.Connection = $sqlConn
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# Suspend Database
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$Command.CommandText = $suspendDb
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$Result = $Command.ExecuteNonQuery();
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# Take a disk snapshot
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try
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{
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$osDiskId=az vm show -g $resourceGroupName -n $vmName --query "storageProfile.osDisk.managedDisk.id" -o tsv
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az snapshot create -g $resourceGroupName --source "$osDiskId" --name $snapshotName
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}
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catch
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{
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# Unsuspend Database
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$Command.CommandText = $unsuspendDb
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$Result = $Command.ExecuteNonQuery();
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}
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# Backup database metadata
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$Command.CommandText = $backupMetadata
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$Result = $Command.ExecuteNonQuery();
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# Unsuspend Database
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$Command.CommandText = $unsuspendDb
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$Result = $Command.ExecuteNonQuery();
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# Close SQL Server connection
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$sqlConn.Close()
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# Mount Disk
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###########################################
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$snapshot = Get-AzSnapshot -SnapshotName $snapshotName
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# Create Disk from snapshot
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$diskConfig = New-AzDiskConfig -AccountType $storageType -Location $location -CreateOption Copy -SourceResourceId $snapshot.Id -Zone 1
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New-AzDisk -ResourceGroupName $resourceGroupName -DiskName $diskName -Disk $diskConfig
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#Attach disk to VM
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$disk = Get-AzDisk -ResourceGroupName $resourceGroupName -DiskName $diskName
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$vm = Get-AzVM -Name $vmName -ResourceGroupName $resourceGroupName
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$vm = Add-AzVMDataDisk -Name $diskName -CreateOption Attach -Lun 0 -VM $vm -ManagedDiskId $disk.Id
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Update-AzVM -VM $vm -ResourceGroupName $resourceGroupName
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# Bring disk online
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###########################################
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# TODO: Get Disk Number programmatically - Currently hardcoded to 2
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Set-Disk -Number 2 -IsOffline $false
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# Drop database and restore from snapshot
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###########################################
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# Open SQL Server connection to master
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$sqlConn.ConnectionString = "server='" + $SQLServer +"';database='master';Integrated Security=True;"
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$sqlConn.Open()
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$Command = New-Object System.Data.SQLClient.SQLCommand
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$Command.Connection = $sqlConn
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# Drop Database
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$Command.CommandText = $dropDB
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$Result = $Command.ExecuteNonQuery();
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# Restore Database
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$Command.CommandText = $restoreDB
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$Result = $Command.ExecuteNonQuery();
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# Close SQL Server connection
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$sqlConn.Close()
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# Clean up
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###########################################
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# Open SQL Server connection to master
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$sqlConn.ConnectionString = "server='" + $SQLServer +"';database='master';Integrated Security=True;"
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$sqlConn.Open()
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$Command = New-Object System.Data.SQLClient.SQLCommand
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$Command.Connection = $sqlConn
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# Drop Database
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$Command.CommandText = $dropDB
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$Result = $Command.ExecuteNonQuery();
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# Close SQL Server connection
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$sqlConn.Close()
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# Remove snapshot
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Remove-AzSnapshot -ResourceGroupName $resourceGroupName -SnapshotName $snapshotName -Force;
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# Remove metadata file
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if (Test-Path $bkmFile) {
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Remove-Item $bkmFile
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}
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# Remove disk from VM
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$vm = Remove-AzVMDataDisk -VM $vm -Name $diskName
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Update-AzVM -VM $vm -ResourceGroupName $resourceGroupName
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# Remove unmanaged disk
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Remove-AzDisk -ResourceGroupName $resourceGroupName -DiskName $diskName -Force;
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