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Kemp Application Monitor

I am setting up an Application Monitor for our KEMP Load Balancer. It's not enough to add the IPs for the Virtual Servers with ICMP, because those will ping as Up, even when the VS is reporting down in Kemp. I've been trying to use PowerShell to get the status of a VS.

$RemServer = "xxx.xxx.xxx.xxx"
$IP = "xxx.xxx.xxx.xxx"
import-module kemp.loadbalancer.powershell

$status = (Get-VirtualService -VirtualService $IP -Protocol tcp -port 443 -LoadBalancer $RemServer).Status
echo ($?)
echo "Status Result"
echo $status

if ($status -ne "Up") {
exit 1
}
else {
exit 0
}

If I run the script in Powershell ISE on the Orion Server itself it works because the Kemp.LoadBalancer.PowerShell module is loaded on the Orion it works as intended:

True

Status Result

But in Application Monitor using the Windows PowerShell Monitor, I get the Output Result:

Output: ==============================================

False

Status Result

Errors: ==============================================

import-module : The specified module 'kemp.loadbalancer.powershell' was not loaded because no valid module file was found in any module directory.

At line:8 char:5

+ import-module kemp.loadbalancer.powershell

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

+ CategoryInfo : ResourceUnavailable: (kemp.loadbalancer.powershell:String) [Import-Module], FileNotFoundException

+ FullyQualifiedErrorId : Modules_ModuleNotFound,Microsoft.PowerShell.Commands.ImportModuleCommand

Get-VirtualService : The term 'Get-VirtualService' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.

At line:16 char:12

+ $status = (Get-VirtualService -VirtualService $IP -Protocol tcp -port 443 -LoadB ...

+ ~~~~~~~~~~~~~~~~~~

+ CategoryInfo : ObjectNotFound: (Get-VirtualService:String) [], CommandNotFoundException

+ FullyQualifiedErrorId : CommandNotFoundException

To Troubleshoot I've already:

checked $env:PSModulePath and it includes the path to the Kemp.LoadBalancer.Powershell
checked my PS Version - which is at 4.0

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Accepted answers

jdumke

I have it working now. I had to comment out the lines in KEMP.LoadBlanacer.Powershell.psd1 module on my Orion servers in two places where it had PowerShellHostVersion =
"2.0'. Additionally, I had to change the Application Monitor to run on the x64 platform instead of x86.

Final scripts:

S Script for Kemp - VS & RS Up/Down Counts:

#Get
credentials, start remote session and import commands from that session

$RemServer= "xxx.xxx.xxx.xxx"

#Initialize-LoadBalancer
-Address $remServer -LBPort $port -Credential "xxxx"

if
(!(get-module -name kemp.loadbalancer.powershell)) {

import-module kemp.loadbalancer.powershell

}

[array]$vsTotArr = (Get-VSTotals -LBPort 443 -LoadBalancer $RemServer)

if
($?) {

$vsTot = $vsTotArr[0].Total

$vsUp = $vsTotArr[0].Up

$vsDown = $vsTotArr[0].Down

$rsTot = $vsTotArr[2].Total

$rsUp = $vsTotArr[2].Up

$rsDown = $vsTotArr[2].Down

write-host "Statistic.VSTot:
$($vsTot)"

write-host "Message.VSTot: VS Total"

write-host "Statistic.VSUp:
$($vsUp)"

write-host "Message.VSUp: VS Up"

write-host "Statistic.VSDown:
$($vsDown)"

write-host "Message.VSDown: VS Down"

write-host "Statistic.rsTot:
$($rsTot)"

write-host "Message.rsTot: RS Total"

write-host "Statistic.rsUp:
$($rsUp)"

write-host "Message.rsUp: RS Up"

write-host "Statistic.rsDown:
$($rsDown)"

write-host "Message.rsDown: RS Down"

exit 0

}

else
{

write-host "Statistic.VSTot: 0"

write-host "Message.VSTot: VS Total"

write-host "Statistic.VSUp: 0"

write-host "Message.VSUp: VS Up"

write-host "Statistic.VSDown: 0"

write-host "Message.VSDown: VS Down"

write-host "Statistic.rsTot: 0"

write-host "Message.rsTot: RS Total"

write-host "Statistic.rsUp: 0"

write-host "Message.rsUp: RS Up"

write-host "Statistic.rsDown: 0"

write-host "Message.rsDown: RS Down"

exit 1

}

PS Script for Kemp - Statistics:

#Get
credentials, start remote session and import commands from that session

$RemServer = "xxx.xxx.xxx.xxx"

#Initialize-LoadBalancer
-Address $remServer -LBPort $port -Credential "xxxx"

if
(!(get-module -name kemp.loadbalancer.powershell)) {

import-module kemp.loadbalancer.powershell

}

[array]$TotArr = (Get-Statistics -totals -LBPort 443 -LoadBalancer $RemServer)

if
($?) {

$TotC = $TotArr.TotalConns

$TotBi = $TotArr[0].TotalBits

$TotP = $TotArr[0].TotalPackets

$TotBy = $TotArr[0].TotalBytes

$CPS = $TotArr[0].ConnsPerSec

$BiPS = $TotArr[0].BitsPerSec

$PPS = $TotArr[0].PktsPerSec

$ByPS = $TotArr[0].BytesPerSec

write-host "Statistic.TotC:
$($TotC)"

write-host "Message.TotC: Total
Conn"

write-host "Statistic.TotBi:
$($TotBi)"

write-host "Message.TotBi: Total
Bits"

write-host "Statistic.TotP:
$($TotP)"

write-host "Message.TotP: Total
Pkts"

write-host "Statistic.TotBy:
$($TotBy)"

write-host "Message.ToTBy: Total
Bytes"

write-host "Statistic.CPS: $($CPS)"

write-host "Message.CPS: Conn/Sec"

write-host "Statistic.BiPS:
$($BiPS)"

write-host "Message.BiPS: Bits/Sec"

write-host "Statistic.PPS: $($PPS)"

write-host "Message.PPS: Pkts/Sec"

write-host "Statistic.ByPS:
$($ByPS)"

write-host "Message.ByPS: Bytes/Sec"

exit 0

}

else
{

write-host "Statistic.TotC: 0"

write-host "Message.TotC: Total
Conn"

write-host "Statistic.TotBi: 0"

write-host "Message.TotBi: Total
Bits"

write-host "Statistic.TotP: 0"

write-host "Message.TotP: Total
Pkts"

write-host "Statistic.TotBy: 0"

write-host "Message.ToTBy: Total
Bytes"

write-host "Statistic.CPS: 0"

write-host "Message.CPS: Conn/Sec"

write-host "Statistic.BiPS: 0"

write-host "Message.BiPS: Bits/Sec"

write-host "Statistic.PPS: 0"

write-host "Message.PPS: Pkts/Sec"

write-host "Statistic.ByPS: 0"

write-host "Message.ByPS: Bytes/Sec"

exit 1

}

All comments

joe.tran

There are a few things that affect a PowerShell Monitor's ability to execute properly.

Is the Execution Mode set to Local Host or Remote Host? Not familiar with this module, but my guess it should be Local Host so that it runs from the Orion poller.

Are you using "Run the script under specified account"? I believe if this is not checked then it will run under whatever account is running your Orion services, which defaults to NT AUTHORITY\SYSTEM account.

Toss in a whoami and a $env:PSModulePath -split ";" into the script in Orion to know for certain.

Are the module files installed in one of these locations? These paths should be available to all accounts on the server by default. Basically you don't the module files in any User directory since the any other account won't have that directory in their $env:PSModulePath.

C:\Program Files\WindowsPowerShell\Modules

C:\Windows\system32\WindowsPowerShell\v1.0\Modules\

C:\Program Files (x86)\Microsoft SQL Server\120\Tools\PowerShell\Modules\

Side Note--I always include Statistic: and optionally Message: in the output because I think more is more

if ($status -ne "Up") {    Write-Host "Statistic: 1"    Write-Host "Message: $status"    exit 1}else {    Write-Host "Statistic: 0"    Write-Host "Message: $status"    exit 0}

jdumke

Thanksjoe.tran. I am running this locally and have done the testing to eliminate this being a permissions issue or a path issue.

I did a dir command within PS on the App Monitor and found that several modules weren't listed, there were listed if I did a dir within ISE. It's not a permissions issue, but a 64 bit vs 32 bit issue.

So I switched the platform on the App Monitor just now to 64 bit. Problem using new module

Now I am working on this error:

import-module : The current Windows PowerShell host is: 'ApmPSHost' (version 1.0). The module 'C:\Windows\system32\WindowsPowerShell\v1.0\Modules\kemp.loadbalancer.powershell\kemp.loadbalancer.powershell.psd1' requires a minimum Windows PowerShell host version of '2.0' to run.

At line:7 char:5

joe.tran

Interesting.

So from an app monitor, I ran the following "script"

Write-Host "Current PSHost Name is " $host.name$PSVersionTableget-host

and got this in return:

Output: ==============================================

Current PSHost Name is ApmPSHost

Name Value

---- -----

PSVersion 4.0

WSManStackVersion 3.0

SerializationVersion 1.1.0.1

CLRVersion 4.0.30319.34209

BuildVersion 6.3.9600.16406

PSCompatibleVersions {1.0, 2.0, 3.0, 4.0}

PSRemotingProtocolVersion 2.2

Name : ApmPSHost

Version : 1.0

InstanceId : ea43f291-546e-4bad-a7ac-70b170a1b987

UI : System.Management.Automation.Internal.Host.InternalHostUserInterface

CurrentCulture : en-US

CurrentUICulture : en-US

PrivateData :

IsRunspacePushed :

Runspace :

The psd1 file in the Kemp module does define PowerShellHostVersion requirements. Try either removing the manifest file all together from your Orion system OR comment out the PowerShellHostVersion line from the psd1 file OR edit so it is defined as '1.0' instead.

If I run get-host in console or in ISE, both versions reflect the version listed from PSVersionTable.

jdumke

Final scripts:

S Script for Kemp - VS & RS Up/Down Counts:

#Get
credentials, start remote session and import commands from that session

$RemServer= "xxx.xxx.xxx.xxx"

#Initialize-LoadBalancer
-Address $remServer -LBPort $port -Credential "xxxx"

if
(!(get-module -name kemp.loadbalancer.powershell)) {

import-module kemp.loadbalancer.powershell

}

[array]$vsTotArr = (Get-VSTotals -LBPort 443 -LoadBalancer $RemServer)

if
($?) {

$vsTot = $vsTotArr[0].Total

$vsUp = $vsTotArr[0].Up

$vsDown = $vsTotArr[0].Down

$rsTot = $vsTotArr[2].Total

$rsUp = $vsTotArr[2].Up

$rsDown = $vsTotArr[2].Down

write-host "Statistic.VSTot:
$($vsTot)"

write-host "Message.VSTot: VS Total"

write-host "Statistic.VSUp:
$($vsUp)"

write-host "Message.VSUp: VS Up"

write-host "Statistic.VSDown:
$($vsDown)"

write-host "Message.VSDown: VS Down"

write-host "Statistic.rsTot:
$($rsTot)"

write-host "Message.rsTot: RS Total"

write-host "Statistic.rsUp:
$($rsUp)"

write-host "Message.rsUp: RS Up"

write-host "Statistic.rsDown:
$($rsDown)"

write-host "Message.rsDown: RS Down"

exit 0

}

else
{

write-host "Statistic.VSTot: 0"

write-host "Message.VSTot: VS Total"

write-host "Statistic.VSUp: 0"

write-host "Message.VSUp: VS Up"

write-host "Statistic.VSDown: 0"

write-host "Message.VSDown: VS Down"

write-host "Statistic.rsTot: 0"

write-host "Message.rsTot: RS Total"

write-host "Statistic.rsUp: 0"

write-host "Message.rsUp: RS Up"

write-host "Statistic.rsDown: 0"

write-host "Message.rsDown: RS Down"

exit 1

}

PS Script for Kemp - Statistics:

#Get
credentials, start remote session and import commands from that session

$RemServer = "xxx.xxx.xxx.xxx"

#Initialize-LoadBalancer
-Address $remServer -LBPort $port -Credential "xxxx"

if
(!(get-module -name kemp.loadbalancer.powershell)) {

import-module kemp.loadbalancer.powershell

}

[array]$TotArr = (Get-Statistics -totals -LBPort 443 -LoadBalancer $RemServer)

if
($?) {

$TotC = $TotArr.TotalConns

$TotBi = $TotArr[0].TotalBits

$TotP = $TotArr[0].TotalPackets

$TotBy = $TotArr[0].TotalBytes

$CPS = $TotArr[0].ConnsPerSec

$BiPS = $TotArr[0].BitsPerSec

$PPS = $TotArr[0].PktsPerSec

$ByPS = $TotArr[0].BytesPerSec

write-host "Statistic.TotC:
$($TotC)"

write-host "Message.TotC: Total
Conn"

write-host "Statistic.TotBi:
$($TotBi)"

write-host "Message.TotBi: Total
Bits"

write-host "Statistic.TotP:
$($TotP)"

write-host "Message.TotP: Total
Pkts"

write-host "Statistic.TotBy:
$($TotBy)"

write-host "Message.ToTBy: Total
Bytes"

write-host "Statistic.CPS: $($CPS)"

write-host "Message.CPS: Conn/Sec"

write-host "Statistic.BiPS:
$($BiPS)"

write-host "Message.BiPS: Bits/Sec"

write-host "Statistic.PPS: $($PPS)"

write-host "Message.PPS: Pkts/Sec"

write-host "Statistic.ByPS:
$($ByPS)"

write-host "Message.ByPS: Bytes/Sec"

exit 0

}

else
{

write-host "Statistic.TotC: 0"

write-host "Message.TotC: Total
Conn"

write-host "Statistic.TotBi: 0"

write-host "Message.TotBi: Total
Bits"

write-host "Statistic.TotP: 0"

write-host "Message.TotP: Total
Pkts"

write-host "Statistic.TotBy: 0"

write-host "Message.ToTBy: Total
Bytes"

write-host "Statistic.CPS: 0"

write-host "Message.CPS: Conn/Sec"

write-host "Statistic.BiPS: 0"

write-host "Message.BiPS: Bits/Sec"

write-host "Statistic.PPS: 0"

write-host "Message.PPS: Pkts/Sec"

write-host "Statistic.ByPS: 0"

write-host "Message.ByPS: Bytes/Sec"

exit 1

}