Provide labels for Azure Tags per metric

[tomkerkhove]

We should determine if it's feasible and makes sense to provide labels for Azure Tags per metric.

Original suggestion was made in #462 by @brusMX .

Checklist

• Provide integration
• Provide capability to opt-in
• Provide documentation on the feature
• Extend metric labeling documentation (see Provide documentation on how we approach labelling of metrics #605)

[jcorioland]

Having a look at the code I think this is something that might be doable easily in the QueryMetricAsync method of AzureMonitorClient class. Like that:

// get tags
string resourceGroupName = "EXTRACT NAME FROM resourceId";
var resourceGroup = await _authenticatedAzureSubscription.ResourceGroups.GetByNameAsync(resourceGroupName);
 var tags = resourceGroup.Tags;

I am just wondering how we can add Tags property on the metric as you seem to use the object from the monitoring SDK, right?

Any thoughts on that @tomkerkhove ?

[tomkerkhove]

I've had a look and I can access the data very easily, however, you need to know what property to call so ever scraper has to do it.

Will be a good addition, but it will be opt-in and only for post v1.0.

Does that sound fair?

[tomkerkhove]

From a Promitor perspective, I think we should only get tags from the resource itself rather than the resource group.

That way we keep the required permissions scoped to what is essential and we get aimed tags.

[jcorioland]

Yep makes sense. And I checked yesterday, seems like the Monitoring Reader role is enough to get the tags, which is great in the case of Promitor :)

[tomkerkhove]

That is correct! Will add this tomorrow!

[tomkerkhove]

Figuring out how we can easily do this in a generic way via Azure/azure-libraries-for-net#719

Worst case this is moved to a later version.