FinOps best practices for Web

This article outlines a collection of proven FinOps practices for web services. It provides strategies for optimizing costs, improving efficiency, and using Azure Resource Graph (ARG) queries to gain insights into your web resources. By following these practices, you can ensure that your web services are cost-effective and aligned with your organization's financial goals.


App Service

The following sections provide ARG queries for App Service. These queries help you gain insights into your App Service resources and ensure they're configured with the appropriate settings. By analyzing App Service plans and surfacing recommendations from Azure Advisor, you can optimize your App Service resources for cost efficiency.

Query: Web Application Status

This ARG query retrieves the status and basic information of web applications within your Azure environment.

Category

Monitoring

Query

resources
| where type =~ 'Microsoft.Web/sites'
| project
    id,
    WebAppName = name,
    Type = kind,
    Status = tostring(properties.state),
    WebAppLocation = location,
    AppServicePlan = tostring(properties.serverFarmId),
    WebAppRG = resourceGroup,
    SubscriptionId = subscriptionId
| order by id asc

Remove empty App Service plans

Recommendation: Remove App Service plans that have no apps or functions hosted to avoid unnecessary charges.

About empty App Service plans

App Service plans define the compute resources for your web apps. Paid plans incur charges based on their configured SKU and instance count, regardless of whether any apps are hosted on them. Empty plans can accumulate during development or when apps are moved between plans. Removing unused plans eliminates unnecessary costs.

Note

FinOps hubs can automatically identify empty App Service plans. Learn more.

Identify empty App Service plans

Use the following ARG query to identify App Service plans with no hosted apps.

resources
| where type =~ 'microsoft.web/serverfarms'
| where toint(properties.numberOfSites) == 0
| where sku.tier !~ 'Free'
| project
    ResourceId = tolower(id),
    ResourceName = name,
    SKUName = tostring(sku.name),
    SKUTier = tostring(sku.tier),
    Region = location,
    ResourceGroupName = resourceGroup,
    SubscriptionId = subscriptionId

Query: App Service plan details

This ARG query retrieves detailed information about Azure App Service Plans within your Azure environment.

Category

Resource management

Query

resources
| where type == "microsoft.web/serverfarms"  and sku.tier !~ 'Free'
| project
    planId = tolower(tostring(id)),
    name,
    skuname = tostring(sku.name),
    skutier = tostring(sku.tier),
    workers = tostring(properties.numberOfWorkers),
    maxworkers = tostring(properties.maximumNumberOfWorkers),
    webRG = resourceGroup,
    Sites = tostring(properties.numberOfSites),
    SubscriptionId = subscriptionId
| join kind=leftouter (
    resources
    | where type == "microsoft.insights/autoscalesettings"
    | project
        planId = tolower(tostring(properties.targetResourceUri)),
        PredictiveAutoscale = properties.predictiveAutoscalePolicy.scaleMode,
        AutoScaleProfiles = properties.profiles,
        resourceGroup
) on planId

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