Ozzy Citrix Noobs

Once a while, I am getting users calling “Service Unavaible” after logon to Access Gateway. By checking, found that one of the Application Pools in IIS was down. I have set seperate application pool for each Citrix Web Interface site, so if one application pool is down, only one site is affected. But how do I monitor this? By googling, I found the following from http://forums.webhostautomation.com/showthread.php?t=11141, and I am only showing this here to thank the author for his wonderful idea. I have created a scheduled task to run this vbscript on the two Web Interface servers every 30 minutes for 24 hours, so I will be notified by email fairly quickly once there is a problem. In the script, I am using my own SendEmail to use SMTP server, as there is no Outlook client installed on that IIS server.

===Code Starts==========================================================
‘ Variables that need to be defined for the script to work
‘http://forums.webhostautomation.com/showthread.php?t=11141
Const LogDir = “C:\Source\AppPoolLog”
ToAddress = “user@it.com”
FromAddress = “user@it.com”

showAppPools ‘Runs showAppPools Sub

‘ This will get the list of all app pools on the server
Sub showAppPools
Dim obj,apool
set obj = GetObject("IIS://localhost/W3SVC/apppools")
for each apool in obj
apppoolStatus apool.name
Next
set obj = nothing
End Sub

‘ This will get the status of the app pool
Sub apppoolStatus(apppool)
Dim obj
set obj = GetObject("IIS://localhost/W3SVC/apppools/” & apppool)
Select Case obj.apppoolstate
Case 0
writetoLog apppool,"0″ ‘Do not know what this status is
Case 1
writetoLog apppool,"1″ ‘Do not know what this status is
Case 2
writetoLog apppool,"Up”
Case 3
writetoLog apppool,"3″ ‘Do not know what this status is
Case 4
writetoLog apppool,"DOWN”
startapppool apppool
SendEmail GetComputerName,apppool
writetoLog apppool,"Restarted”
End Select
set obj = nothing
End Sub

‘ This will write information to a log file
Sub writetoLog(apppool,response)
Dim fso
lday = datepart("d",date)
lmonth = datepart("m",date)
lyear = datepart("yyyy",date)
logdate = lyear & lmonth & lday
set fso = CreateObject ("Scripting.FileSystemObject")
Set objFSOwriteline = FSO.OpenTextFile(LogDir & “\” & logdate & “.log", 8,True)
objFSOwriteline.WriteLine(response & “,” & apppool & “,” & now())
objFSOwriteline.close
Set objFSOwriteline = nothing
set fso = nothing
End Sub

‘ This starts the down app pool
Sub startapppool(apppool)
Dim obj
set obj = GetObject("IIS://localhost/W3SVC/apppools/” & apppool)
obj.start
set obj = nothing
End Sub

‘ This send a email regarding the down/restarted app pool
Sub emailSendCDOSYS(apppool)
Dim Mailer
Set Mailer=CreateObject("CDO.Message")
Message = “===============================================” & VbCrLf
Message = Message & “Application Pool: ” & apppool & ” has been restarted” & VbCrLf
Message = Message & “Date/Time: “& now() &"” & VbCrLf
Message = Message & “===============================================” & VbCrLf
Subject = “Application Pool: ” & apppool & ” has been restarted”
Mailer.TextBody = Message
Mailer.Subject = Subject
Mailer.To = ToAddress
Mailer.From = FromAddress
Mailer.Send
set Mailer = Nothing
End Sub

sub SendEmail(ServerName, apppool)

Set objEmail = CreateObject("CDO.Message")
objEmail.From = “user@it.com”
objEmail.To = “user@it.com”
objEmail.Subject = “Application pool: ” & apppool & ” is restarted on ” & ServerName
objEmail.Textbody = “Application Pool error.”
objEmail.Configuration.Fields.Item _
("http://schemas.microsoft.com/cdo/configuration/sendusing") = 2
objEmail.Configuration.Fields.Item _
("http://schemas.microsoft.com/cdo/configuration/smtpserver") = _
“smtp.it.com”
objEmail.Configuration.Fields.Item _
("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = 25
objEmail.Configuration.Fields.Update
objEmail.Send

End Sub

Function GetComputerName
Set objWMISvc = GetObject( “winmgmts:\\.\root\cimv2″ )
Set colItems = objWMISvc.ExecQuery( “Select * from Win32_ComputerSystem", , 48 )
For Each objItem in colItems
strComputerName = objItem.Name
Next
GetComputerName = strComputerName
End Function
===Code ends============================================