性能、可用性、伸缩性、扩展性、安全性、可监控是网站架构最核心的几个要素
IIS经常出现假死的情况，具体什么时候会出现假死，我就不说了，今天我要写的是如何监控IIS的状态。程序的功能是：如果IIS是为运行的状态，就重启IIS,如果IIS的连接数达到了设置的连接数，也重启IIS。我写了一个window服务，时刻监控着IIS的运行状态。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Management;
using System.Diagnostics;
using System.ServiceProcess;
using System.Configuration;
namespace IISWatcher
{
public partial>
{
public IISWatcher()
{
InitializeComponent();
}
System.Timers.Timer tmr;
protected override void OnStart(string[] args)
{
tmr
= new System.Timers.Timer();
tmr.Interval
= 6000;
tmr.Elapsed
+= new System.Timers.ElapsedEventHandler(tmr_Elapsed);
tmr.Enabled
= true;
}
void tmr_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
string currentAnonymousUsers = "";
string timeOut = "";
try
{
currentAnonymousUsers
= ConfigurationManager.AppSettings["CurrentAnonymousUsers"];
timeOut
= ConfigurationManager.AppSettings["TimeOut"];
ServiceController winSc
= new ServiceController("WAS");
if (winSc.Status != System.ServiceProcess.ServiceControllerStatus.Running && winSc.Status != System.ServiceProcess.ServiceControllerStatus.StartPending)
{
StartService(
"WAS");
}
ServiceController sc
= new ServiceController("W3SVC");
if (sc.Status != System.ServiceProcess.ServiceControllerStatus.Running && sc.Status != System.ServiceProcess.ServiceControllerStatus.StartPending)
{
StartService(
"W3SVC");
}
else
{
SelectQuery query
= new SelectQuery("Select " + currentAnonymousUsers + " from Win32_PerfRawData_W3SVC_WebService where name=\"_total\"");
ManagementObjectSearcher searcher
= new ManagementObjectSearcher(query);
int currentAnonUsers = 0;
foreach (ManagementBaseObject disk in searcher.Get())
{
int.TryParse(disk.ToString(), out currentAnonUsers);
}
if (currentAnonUsers > Convert.ToInt32(timeOut))
{
StartService(
"W3SVC");
}
}
}
catch (Exception ex)
{
EventLog.WriteEntry(
"IISWatcherRecord", "ErrorMessage:" + ex.Message, EventLogEntryType.Error);
}
}
static private void StartService(string serviceName)
{
ServiceController sc
= new ServiceController(serviceName);
sc.Start();
for (int i = 0; i < 5; i++)
{
sc.Refresh();
System.Threading.Thread.Sleep(
1000);
if (sc.Status == System.ServiceProcess.ServiceControllerStatus.Running)
{
break;
}
if (i == 4)
{
throw new Exception(serviceName + "启动失败！启动时间超过5秒！");
}
}
}
protected override void OnStop()
{
tmr.Stop();
}
}
}
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