PowerShell性能监控告警

实际上，我们可以通过PowerShell来获取性能计数器的值，比如当计算机可用内存小于500MB时，则自动发送邮件告警。

在PowerShell中，并没有专门的命令来获取性能计数器的值，也无法直接发送邮件，都需要先创建.Net Framework类的实例。

1）获取性能计数器代码如下：

#新建性能计数器对象

$counter = New-Object Diagnostics.PerformanceCounter

#添加计数器，此处监视内存性能

$counter.CategoryName = "Memory"

#添加计数器属性值，此处监视可用内存

$counter.CounterName = "Available MBytes"

#获取当前计数器的值

$value = $counter.NextValue()

2）发送邮件代码如下：

#定义SMTP服务器地址，发件人账户及其密码

$smtpServer = "smtp.163.com"

$smtpUser = "sender@163.com"

$smtpPassword = "mypasswd"

 

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

#定义发件人邮箱地址、收件人邮箱地址

$MailAddress="sender@163.com"

$MailtoAddress="receiver@126.com"

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

$mail.To.Add($MailtoAddress)

 

#定义邮件标题、优先级和正文

$mail.Subject = "警报";

$mail.Priority  = "High"

$mail.Body = "PowerShell发送邮件测试！"

 

完整的代码如下：

#添加性能计数器

$counter = New-Object Diagnostics.PerformanceCounter

$counter.CategoryName = "Memory"

$counter.CounterName = "Available MBytes"

$value = $counter.NextValue()

#设置预设阀值

$prevalue = 500

 

#定义SMTP服务器地址，发件人账户及其密码

$smtpServer = "smtp.163.com"

$smtpUser = "sender@163.com"

$smtpPassword = "mypasswd"

 

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

#定义发件人邮箱地址、收件人邮箱地址

$MailAddress="sender@163.com"

$MailtoAddress="receiver@qq.com"

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

$mail.To.Add($MailtoAddress)

 

#定义邮件标题、优先级和正文

$mail.Subject = "警报";

$mail.Priority  = "High"

$mail.Body = "XX值已达到$value，已超出预设阀值$prevalue!"

 

#判断是否超过预设阀值，如超出则发邮件报警

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)

}

 

 

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

#查看当前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

}

 

#查看进程的CPU利用率：

#取CPU核心数量，如果计算机为多核心的话，Process/% Processor Time的结果为每个核心的CPU利用率之和，会大于100%
$cpus = (gwmi win32_computersystem).NumberOfLogicalProcessors
 
$counter = New-Object Diagnostics.PerformanceCounter
$counter.CategoryName = "Process"
$counter.CounterName = "% Processor Time"
$counter.InstanceName = "winrar" #定义需要监视的进程
#获取当前计数器的值
$counter.NextValue()/$cpus

 

NumberOfCores：表示CPU核心数
NumberOfLogicalProcessors：表示CPU线程数

 

#查看进程的内存使用情况：

$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" #定义需要监视的进程
#获取当前计数器的值

$counter.NextValue()/$TotalMemory