批量创建VM快照脚本

来分享一个批量给所有虚机创建快照的脚本，这个虽然不难，不过还是比较实用的，脚本的效果就是给某个资源组下的所有虚机，都创建一个快照出来，包括虚机的OS盘以及数据盘都会打一个快照，这在做某些变更时还是比较方便的，不用再一个个打快照了

可以结合Azure Automation来一起使用，会更简单高效

具体脚本的内容如下

# take snapshots for all vms in the resource group
# https://learn.microsoft.com/en-us/azure/virtual-machines/snapshot-copy-managed-disk?tabs=powershell

param(
    [string]$VM_Resource_Group_Name,
    [string]$Target_Resource_Group_Name
)

function Take-Snapshot {
    param (
        $Snapshot_Config,
        $Snapshot_Name,
        $ResourceGroupName
    )
    
    try {
        $Error.clear()
        Write-Output "Creating snapshot $Snapshot_Name ... "
        New-AzSnapshot -Snapshot $Snapshot_Config -SnapshotName $Snapshot_Name -ResourceGroupName $ResourceGroupName  -ErrorAction Stop | out-null

    }
    catch {
        Write-Output $Error[0].exception.message
    }

}

$AzureContext = (Connect-AzAccount -Identity -Environment AzureChinaCloud).context
# set and store context
$AzureContext = Set-AzContext -SubscriptionName $AzureContext.Subscription -DefaultProfile $AzureContext
Select-AzSubscription -SubscriptionId "xxxxxxx";



$VMs = Get-AzVM -ResourceGroupName $VM_Resource_Group_Name -ErrorAction Stop
foreach ($vm in $VMs) {

    # OS Disk
    $OSDisk = $vm.StorageProfile.OsDisk
    $OSDisk_ID = $vm.StorageProfile.OsDisk.ManagedDisk.id
    $Snapshot_Config_OS = New-AzSnapshotConfig -SourceUri $OSDisk_ID -CreateOption Copy -Location $VM.Location -AccountType Standard_LRS
    $Snapshot_Name_OS = $OSDisk.Name + "_snapshot_" + (Get-Date -Format "yyyy-MM-dd-HH-mm-ss")
    
    $Target_Resource_Group = Get-AzResourceGroup -Name $Target_Resource_Group_Name -ErrorAction SilentlyContinue
    if ($null -eq $Target_Resource_Group) {
        New-AzResourceGroup -Name $Target_Resource_Group_Name -Location $VM.Location | out-null
    }
    Take-Snapshot -Snapshot_Config $Snapshot_Config_OS -Snapshot_Name $Snapshot_Name_OS -ResourceGroupName $Target_Resource_Group_Name
    
    # Data disk
    $Data_Disks = $vm.StorageProfile.DataDisks
    if ($Data_Disks.count -ne 0) {
        foreach ($Data_Disk in $Data_Disks) {

            $Data_Disk_ID = $Data_Disk.ManagedDisk.id
            $Snapshot_Config_Data_Disk = New-AzSnapshotConfig -SourceUri $Data_Disk_ID -CreateOption Copy -Location $VM.Location -AccountType Standard_LRS
            $Snapshot_Name_Data_Disk = $Data_Disk.Name + "_snapshot_" + (Get-Date -Format "yyyy-MM-dd-HH-mm-ss")
            Take-Snapshot -Snapshot_Config $Snapshot_Config_Data_Disk -Snapshot_Name $Snapshot_Name_Data_Disk -ResourceGroupName $Target_Resource_Group_Name
        }
    }
    else {

        Write-Output "No data disk found for VM $($VM.Name)"

    }

}

使用时也很简单，以Azure Automation为例，创建好runbook之后，直接start，然后输入两个参数

• VM_RESOURCE_GROUP_NAME：要打快照的VM所在的resource group
• TARGET_RESOURCE_GROUP_NAME：将快照创建在哪个resource group

可以看到脚本正在运行中，会输出一些log

等待一段时间之后就能看到快照出来了