Azure实践之如何批量为资源组虚拟机创建alert

通过上一篇的简介，相信各位对于简单的创建alert，以及Azure monitor使用以及大概有个印象了。基础的使用总是非常简单的，这里再分享一个常用的alert使用方法

实际工作中，不管是日常运维还是做项目，我们都需要知道VM的实际性能情况，避免出现性能瓶颈，因此创建alert是一种非常方便的方式，我们可以通过alert第一时间知道系统出现了性能的瓶颈，以便尽快采取解决措施。

因此，也衍生了一个实际的问题，单独为一台VM开启alert很简单，但是如果我们需要为一个资源组内十几甚至几十上百台VM统一创建alert，则会非常麻烦

在这里分享一个自己写的简单脚本，可以通过批量的方式为一个资源组内的所有VM，或者是某个单独的VM创建alert，省去很多不必要的重复性工作，以下是代码的内容

<#  .NOTES ===========================================================================  Created with:  SAPIEN Technologies, Inc., PowerShell Studio 2017 v5.4.134  Created on:    2019/1/10 13:19  Created by:    mxy  Organization:    Filename:       =========================================================================== .DESCRIPTION  A description of the file.#>param( [parameter(Mandatory = $true)] [string]$RGName,#资源组名称 [parameter(Mandatory = $false)] [string]$VmName,#VM名称 [parameter(Mandatory = $true)] [string]$MailAddress,#邮件地址 [parameter(Mandatory = $false)] [ValidateSet("CPU", "Memory")] [string]$Metric = "CPU",#需要针对哪个metric创建alert,方便起见这里目前只是设置了CPU和内存两种 [parameter(Mandatory = $false)] [ValidateSet("GreaterThan", "GreaterThanOrEqual", "LessThan", "LessThanOrEqual")] [string]$Operation = "GreaterThan",#操作条件 [parameter(Mandatory = $false)] [int]$Threshold = 50,#阈值 [parameter(Mandatory = $false)] [ValidateSet("Average", "Last", "Maximum", "Minimum", "Total")]#计算方式，是平均还是最大等 [string]$TimeAggregationOperator = "Average", [parameter(Mandatory = $false)] [TimeSpan]$WindowSize = "00:05:00"#时间戳 )function Write-DateTimeMessage{ param (  [parameter(Mandatory = $false)]  [switch]$Warning,  [parameter(Mandatory = $true)]  [string]$Message,  [parameter(Mandatory = $false)]  [string]$ForegroundColor   )   if ($Warning) {  Write-Warning ($(Get-Date -UFormat '%Y/%m/%d %H:%M:%S') + " * " + $Message) } else {  if ($ForegroundColor)  {   Write-Host ($(Get-Date -UFormat '%Y/%m/%d %H:%M:%S') + " * " + $Message) -ForegroundColor $ForegroundColor  }  else  {   Write-Host ($(Get-Date -UFormat '%Y/%m/%d %H:%M:%S') + " * " + $Message)  } } }#Get metric nameswitch ($Metric){ Memory {  $MetricName = "\Memory\% Committed Bytes In Use" } CPU {  $MetricName = "\Processor Information(_Total)\% Processor Time" } default {  # }}#Find the vm if vmname parameter specifiedtry{ $Error.Clear() if ($VmName) {  Write-DateTimeMessage "Trying to find vm $VmName in resource group $RGName"  $vms = Get-AzureRmVM -ResourceGroupName $RGName -Name $VmName -ErrorAction Stop  Write-DateTimeMessage "vm $VmName Found in resource group $RGName" } else {  $vms = Get-AzureRmVM -ResourceGroupName $RGName -ErrorAction Stop }  # Create action email $actionEmail = New-AzureRmAlertRuleEmail -CustomEmail $MailAddress -WarningAction SilentlyContinue  # Get resource id and add alert if ($vms -ne $null) {  foreach ($vm in $vms)  {   $vmID = $vm.id      $AlertName = $vm.Name + "_Alert_" + $Metric + "_" + $Operation + "_" + $Threshold + "_" + $actionEmail.CustomEmails   $Error.Clear()   Write-DateTimeMessage "Trying to add alert for vm $($vm.Name) ..."   Add-AzureRmMetricAlertRule -Name $AlertName -Location "ChinaEast" -ResourceGroup $RGName -TargetResourceId $vmID -MetricName $MetricName -Operator $Operation -Threshold $Threshold -WindowSize $WindowSize -TimeAggregationOperator $TimeAggregationOperator -Action $actionEmail -ErrorAction 'Stop' -WarningAction 'SilentlyContinue' | Out-Null   Write-DateTimeMessage "Add alert for vm $($vm.Name) successfully!"  } } else {  Write-DateTimeMessage "No vm in resource group $RGName"   }  }catch{ Write-DateTimeMessage $Error[0].Exception.Message}

可以看到脚本很简单，运行方法这里举个例子，比如要为mxytest这个资源组下的所有VM创建CPU10分钟之内大于80便发邮件给abc@abc.com的alert，则可以按照以下方式运行

.\Create-AzureAlert.ps1 -RGName mxytest -MailAddress "abc@abc.com" -Metric CPU -Operation GreaterThan -Threshold 80 -TimeAggregationOperator Average -WindowSize "00:10:00"

创建完成后即可在alert中国看到对应的内容

Get-AzureRmAlertRule -ResourceGroupName mxytest -WarningAction SilentlyContinue

也可以通过PowerShell获取到信息