Azure Automation. PSMetric to integer - azure

Question

I am trying to create an Azure Automation workbook that queries a resource for some metrics, and does some scaling up/down based in that metric.
I have no idea how I can convert a PSMetricData to integer in order to do comparisons on it. My code at the moment is
$MonitorParameters = #{
ResourceId = "abcde....."
TimeGrain = [TimeSpan]::Parse("00:05:00")
MetricNames = "cpu_percent"
}
$MetricValues = Get-AzMetric #MonitorParameters -DetailedOutput
$Last = $MetricValues.Data[0]
Write-Output $Last
And my output is
Microsoft.Azure.Commands.Insights.OutputClasses.PSMetricValue
I am looking in general for something like:
"If the last 5 mins has a cpu_percentage > 70%", then scale up..

Answer 1

Just use Write-Output $Last.Average instead of Write-Output $Last, then you will get the specific value.
And you should note the newest value got from the command Get-AzMetric is before the last one hour, e.g. if now is 2:37:00 AM, then the newest one is 1:38:00 AM, you could not get the last 5 mins value, the TimeGrain = [TimeSpan]::Parse("00:05:00") just means get the value every five mins.
Update:
It should work, I create a new elastic pool and test it, it is 0.
My script in the runbook:
$connectionName = "AzureRunAsConnection"
try
{
# Get the connection "AzureRunAsConnection "
$servicePrincipalConnection=Get-AutomationConnection -Name $connectionName
Connect-AzAccount `
-ServicePrincipal `
-TenantId $servicePrincipalConnection.TenantId `
-ApplicationId $servicePrincipalConnection.ApplicationId `
-CertificateThumbprint $servicePrincipalConnection.CertificateThumbprint
}
catch {
if (!$servicePrincipalConnection)
{
$ErrorMessage = "Connection $connectionName not found."
throw $ErrorMessage
} else{
Write-Error -Message $_.Exception
throw $_.Exception
}
}
$MonitorParameters = #{
ResourceId = "/subscriptions/xxxxx/resourceGroups/xxxx/providers/Microsoft.Sql/servers/joyserver1/elasticPools/joypool"
TimeGrain = [TimeSpan]::Parse("00:05:00")
MetricNames = "cpu_percent"
}
$MetricValues = Get-AzMetric #MonitorParameters -DetailedOutput
$Last = $MetricValues.Data[0]
Write-Output $Last

Answer 2

The issue is that I was creating a powershell workflow, not a native powershell script.
The script from #Joy Wang above now works as described