How can i get the CPU usage for an Azure app service using Powershell?

Question

I need to get some metrics for Azure an app service . Values are the CPU (in %) and Memory consumed ( in %). I want to report if for example the CPU is high for a certain period of time , in order to give an indication that the app service is consuming high memory or resources and then send an email .

I am currently using

Get-AzMetricDefinition -ResourceId 
"/subscriptions/<subscriptionid>/resourceGroups/Default-Web- 
 EastUS/providers/microsoft.web/sites/website2" -DetailedOutput -MetricName 
"BytesSent,CpuTime"

But from this how can i get the % CPU and % Memory. Or is there a different Powershell command ?

Answer 1

To get the CPU usage for an Azure app service using PowerShell:

There is an Azure PowerShell command called Get-AZMetric to get all the metrics data from a particular resource (Eg: App Service). However, CPU % is not a supported argument for Get-AZMetric, if you copy the resourceID of the Web App properities as it is a cloud service ID.

We can achieve it for overall AppServicePlan as CPU % supports here.

If the app services hosted in premium, standard and basic plans, CPU% will comes because of scaling out feature whereas CPU_Time is helpful when hosted in free or the shared app service plans.

get-azmetric -resourceID "/subscriptions/<subscriptionID>/resourceGroups/<resourceGroupName>/providers/Microsoft.Web/sites/<AppService>" -MetricName "CpuTime"  -DetailedOutput

After investigating, I've found a way to achieve it with the help of AppServicePlan by taking resourceID as shown:

 az monitor metrics list --resource "/subscriptions/<subscriptionID>/resourceGroups/<resourceGroupName>/providers/Microsoft.Web/serverfarms/<AppservicePlan>" --metrics "CpuPercentage","MemoryPercentage"

Metrics for CPU Percentage:

Metrics for Memory Percentage:

Note:

1. Check the supported metrics through portal by clicking on "Diagnose and solve problems" if needed.

2. Issues with AppService environments