I have a simple SQL query that returns a table with two columns. Column 1 is the name and column two is the result (0=Success, 1=Warning, 2=Fail).

Is it possible to monitor this table with a single SQL query? Additional rows may be added over time so I would like to do this dynamically rather than having to add a new sensor every time.

Article Comments

For those interested, I ended up with a Powershell script to create an XML output to push to a custom EXE/XML advanced sensor.

Once I wrapped my head around the format of the output, it wasn't difficult.

Not sure how code looks in here but the script was for parsing the Veeam database and finding the last results of the backups, then feeding the table to the sensor.

param(
    [string] $serverInstance,
    [string] $sourceDatabase
)

function Invoke-SQL {
    param(
        [string] $dataSource = ".\SQLEXPRESS",
        [string] $database = "MasterData",
        [string] $sqlCommand = $(throw "Please specify a query.")
      )

    $connectionString = "Data Source=$dataSource; " +
            "Integrated Security=SSPI; " +
            "Initial Catalog=$database"

    $connection = new-object system.data.SqlClient.SQLConnection($connectionString)
    $command = new-object system.data.sqlclient.sqlcommand($sqlCommand,$connection)
    $connection.Open()

    $adapter = New-Object System.Data.sqlclient.sqlDataAdapter $command
    $dataset = New-Object System.Data.DataSet
    $adapter.Fill($dataSet) | Out-Null

    $connection.Close()
    $dataSet.Tables

}

$query = "SELECT [name],[latest_result] FROM [$sourceDatabase].[dbo].[BJobs]"

$backupResults = Invoke-SQL -dataSource $serverInstance -database $sourceDatabase -sqlCommand $query



$xmlOutput = '<?xml version="1.0" encoding="UTF-8" ?><prtg>'

foreach ($result in $backupResults) {
    $xmlOutput = $xmlOutput + "<result><channel>$($result.name)</channel><value>$($result.latest_result)</value><LimitMaxWarning>1</LimitMaxWarning><LimitMaxError>2</LimitMaxError><LimitMode>1</LimitMode></result>"
}

$xmlOutput = $xmlOutput + "</prtg>"

$xmlOutput #| Out-File c:\temp\out.xml

You can then create an EXE/XML Advanced sensor, run this script with the parameters:

-serverInstance (servername) -sourceDatabase (databasename)

and it will create a channel for each backup job with success, warning and error levels.


Oct, 2015 - Permalink

Hi Matthew,

Thank you very much for sharing your script. I'm sure this will be helpful to other users! Did you already try the SQLv2 sensor? This sensor will also be support multi channels for SQL queries.

Best regards, Felix


Oct, 2015 - Permalink

I know this is old, but thanks so much for this! Sadly the SQLv2 sensor doesn't support dynamic channels, but through the XML works like a champ! Much appreciated.


Sep, 2019 - Permalink