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Hi,
I am trying to monitor Azure web apps using Azure metrics API. But for JAVA web apps some metrics like private bytes are not supported and when trying to fetch metrics in bulk, the non-supported metrics throw errors like mentioned below:
{"code":"BadRequest","message":"Failed to find metric configuration for provider: Microsoft.Web, resource Type: sites, metric: PrivateBytes"}
Is there any way to avoid these types of errors dynamically via any API before sending a request to azure metrics API? I can know the type of the web app only at the run time.
An Azure service that is used to collect, analyze, and act on telemetry data from Azure and on-premises environments.
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
Hi,
The easiest way would be probably to get the available metrics for the resource first via this API
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.
This API is for listing overall metrics supported in service wise. I need to know the metris supported based on APP deployments
Are you sure? I just did this call on .net web app and on Node web app. On the first I've got 27 metrics available and on the second 22 which means it pulls the metrics available for the type only.
Hi Stanislav,
It seems the API behaves as you have stated but when I used the API last week there were much more metrics than now that's why I have stated that the API returns all the metrics. Is there any known behavior for this difference?
But my question is to know if there is any API to get the Azure web type?
Also, let me know if there is any documentation for the difference in metrics for different apps?
No idea why you got different results but I doubt the API is broken. May be you have missed something when you tested or the app framework was different at that time. The framework you can change every time. Also these apps can be within container or not so there are all kind of options like Windows or Linux.. That is the reason I have forwarded you to the metrics API to get the available ones as that one is something that will be consistent and you do not have to make a lot of logic to find the available metrics. I also haven't seen a document that describes differences due to the framework. I have only seen the official document for the metrics where it says if it is available for web app or functions or both as functions are also web app resource underneath.
Is there any API available for getting app type like Java, .Net?
As I have mentioned is not that simple but if you really want to spend endless hours trying to figure it out you can check the web app API. Inside the siteConfig property there are different properties that designate different configurations for different frameworks like - javaVersion, javaContainerVersion, javaContainer, linuxFxVersion, windowsFxVersion, netFrameworkVersion, nodeVersion, phpVersion, etc. You will have to figure out all the scenarios web app offers in order to determine the framework. For example nodeVersion can be null but linuxFxVersion can be NODE|16-lts which means it is still Node JS framework but it is from built-in container. There is even possibility that all these are null or empty and no framework is defined. API is very old and different functionality was just added overtime which became a mess at some point.
Hey stanislav,
Thank you for your answer. I have deployed all type of apps and verified that only windows apps have those extra metrics. Please confirm the same.
Also, I found a parameter in App service plan to confirm the OS is Windows or Linux. Based on that, can we decide to fetch those extra metrics or not?
Apologies for the long queries!!!! 😊
No problem. I have deployed a few different apps and to my understanding is not just if the app service plan is Windows or Linux. Either the framework or if it is container or both also matters on what kind of metrics are available. You can try to check on your own if the framework is in place but in case it is not in place via the kind property on the web site you can understand if it is linux or windows, if it is container or not. The logic is the following:
But as I have said for me the right way to do this is via metrics API. That is why this API is there to show you the available metrics for the resource. That is how the portal for example shows you the available metrics to pick and display.
Thanks for the response. We cannot depend on the kind attribute as you said.
But I have gone through this document.
properties.reserved -> If Linux app service plan
true,falseotherwise.
Also, in the Get API of Web App, I can find an attribute with the same name.
properties.reserved ->
trueif reserved; otherwise,false.
Can you confirm if both are the same attributes?
Either the framework or if it is container or both also matters on what kind of metrics are available.
Also, if possible can you confirm your observations and specifics like which framework from Linux also had the extra metrics?
Either the framework or if it is container or both also matters on what kind of metrics are available.But I have found a metric reserved in Azure App plan documentation.
properties.reserved -> If Linux app service plan
true,falseotherwise.
Either the framework or if it is container or both also matters on what kind of metrics are available.
properties.reserved ->
trueif reserved; otherwise,false.
can you confirm if both are same metrics to know if the app plan is Windows or Linux?
Either the framework or if it is container or both also matters on what kind of metrics are available.
Also, it will be helpful if you can share your insights and observations. Like in which framework you have seen those additional metrics and what metrics are varying in you deployment?
The frameworks I have not tested as trying to test all frameworks, if it is linux or windows and if it is container or not results in quite a lot of scenarios to deploy. But again for me the cleanest and fastest way to do this is to query to metrics API to see which metrics are available. You do not know what other features will be introduced in the future or may be a new metric added and you will have to change your code all over again. With the metrics API you will not have to.
Hi Stanislav,
I have deployed and checked all the possible combinations in the Azure web apps. All the metrics are based on Linux and Windows. But the only exception is the Dot net apps hosted in Linux. They support additional metrics (Thread Count, Current Assemblies, 3 metrics of Garbage collection) that are supported by other Windows apps.
Supported Metrics:
Linux:
Windows:
Again, querying metrics API is not an option as we have set some statistics to our custom usage for most of the metrics.
Please share your thoughts.
ok. I do not have any particular thoughts than what I have mentioned before.
Hi @cloudteam , I have to concur with @Stanislav Zhelyazkov . The best option is to gather metrics from through the aforementioned API.
Again, querying metrics API is not an option as we have set some statistics to our custom usage for most of the metrics.
I don't follow what you're saying here. Even if you're looking for some predefined metrics, you can use the Get - Metrics API to list all the available metrics for that resource and check your custom statistics against what's available in the name object and unit property. If there isn't a match for a custom statistic, then NaN it.