PowerShell性能監控告警

實際上，我們可以通過PowerShell來獲取性能計數器的值，比如當計算機可用內存小於500MB時，則自動發送郵件告警。

在PowerShell中，並沒有專門的命令來獲取性能計數器的值，也無法直接發送郵件，都需要先創建.Net Framework類的實例。

1）獲取性能計數器代碼如下：

#新建性能計數器對象

$counter = New-Object Diagnostics.PerformanceCounter

#添加計數器，此處監視內存性能

$counter.CategoryName = "Memory"

#添加計數器屬性值，此處監視可用內存

$counter.CounterName = "Available MBytes"

#獲取當前計數器的值

$value = $counter.NextValue()

2）發送郵件代碼如下：

#定義SMTP服務器地址，發件人賬戶及其密碼

$smtpServer = "smtp.163.com"

$smtpUser = "[e-mail]"

$smtpPassword = "mypasswd"

 

$mail = New-Object System.Net.Mail.MailMessage

#定義發件人郵箱地址、收件人郵箱地址

$MailAddress="[e-mail]"

$MailtoAddress="[e-mail]"

$mail.From = New-Object System.Net.Mail.MailAddress($MailAddress)

$mail.To.Add($MailtoAddress)

 

#定義郵件標題、優先級和正文

$mail.Subject = "警報";

$mail.Priority  = "High"

$mail.Body = "PowerShell發送郵件測試！"

 

完整的代碼如下：

#添加性能計數器

$counter = New-Object Diagnostics.PerformanceCounter

$counter.CategoryName = "Memory"

$counter.CounterName = "Available MBytes"

$value = $counter.NextValue()

#設置預設閥值

$prevalue = 500

 

#定義SMTP服務器地址，發件人賬戶及其密碼

$smtpServer = "smtp.163.com"

$smtpUser = "[e-mail]"

$smtpPassword = "mypasswd"

 

$mail = New-Object System.Net.Mail.MailMessage

#定義發件人郵箱地址、收件人郵箱地址

$MailAddress="[e-mail]"

$MailtoAddress="[e-mail]"

$mail.From = New-Object System.Net.Mail.MailAddress($MailAddress)

$mail.To.Add($MailtoAddress)

 

#定義郵件標題、優先級和正文

$mail.Subject = "警報";

$mail.Priority  = "High"

$mail.Body = "XX值已達到$value，已超出預設閥值$prevalue!"

 

#判斷是否超過預設閥值，如超出則發郵件報警

If ( $value -gt $prevalue)

{

 $smtp = New-Object System.Net.Mail.SmtpClient -argumentList $smtpServer

 $smtp.Credentials = New-Object System.Net.NetworkCredential -argumentList $smtpUser,$smtpPassword

 $smtp.Send($mail)

}

 

 

===============================================

#查看當前CPU利用率

$counter = New-Object Diagnostics.PerformanceCounter

$counter.CategoryName = "Processor"

$counter.CounterName = "% Processor Time"

$counter.InstanceName = "_Total"

while ($true)

{

$value = $counter.NextValue()

Write-Host "CPU: $value"

sleep 1

}

 

#查看進程的CPU利用率：

#取CPU核心數量，如果計算機為多核心的話，Process/% Processor Time的結果為每個核心的CPU利用率之和，會大於100%
$cpus = (gwmi win32_computersystem).NumberOfLogicalProcessors
 
$counter = New-Object Diagnostics.PerformanceCounter
$counter.CategoryName = "Process"
$counter.CounterName = "% Processor Time"
$counter.InstanceName = "winrar" #定義需要監視的進程
#獲取當前計數器的值
$counter.NextValue()/$cpus

 

NumberOfCores：表示CPU核心數
NumberOfLogicalProcessors：表示CPU線程數

 

#查看進程的內存使用情況：

$TotalMemory = (Get-WmiObject -Class Win32_PhysicalMemory |measure capacity -sum).Sum   #(gwmi win32_computersystem).TotalPhysicalMemory

$counter = New-Object Diagnostics.PerformanceCounter
$counter.CategoryName = "Process"
$counter.CounterName = "Working Set - Private"
$counter.InstanceName = "ZQErpService" #定義需要監視的進程
#獲取當前計數器的值

$counter.NextValue()/$TotalMemory