Creating Azure Function App with .NET 8 - Bicep Example

Code description

.NET 8 preview 7 is now supported for Azure Functions Linux consumption plan when creating dotnet-isolated function app. This code snippet shows you how to create a Function App using .NET 8. The key part is to change linuxFxVersion  to 'DOTNET-ISOLATED|8.0'.

Code snippet

@description('The name of the Azure Function app.')
param functionAppName string = 'func-${uniqueString(resourceGroup().id)}-dotnet8'

@description('Storage Account type')
@allowed([
  'Standard_LRS'
  'Standard_GRS'
  'Standard_RAGRS'
])
param storageAccountType string = 'Standard_LRS'

@description('Location for all resources.')
param location string = resourceGroup().location

@description('Location for Application Insights')
param appInsightsLocation string = resourceGroup().location


@description('Required for Linux app to represent runtime stack in the format of \'runtime|runtimeVersion\'. For example: \'python|3.10\'')
param linuxFxVersion string = 'DOTNET-ISOLATED|8.0'

@description('The zip content url.')
param packageUri string

var hostingPlanName = functionAppName
var applicationInsightsName = functionAppName
var storageAccountName = '${uniqueString(resourceGroup().id)}azfunctionsdotnet8'

// Storage account for function package
resource storageAccount 'Microsoft.Storage/storageAccounts@2023-01-01' = {
  name: storageAccountName
  location: location
  sku: {
    name: storageAccountType
  }
  kind: 'Storage'
}

resource hostingPlan 'Microsoft.Web/serverfarms@2022-09-01' = {
  name: hostingPlanName
  location: location
  sku: {
    name: 'Y1'
    tier: 'Dynamic'
    size: 'Y1'
    family: 'Y'
  }
  properties: {
    // For creating Linux plans, the reserved property must be set to true.
    reserved: true
  }
}

// application insights
resource applicationInsight 'Microsoft.Insights/components@2020-02-02' = {
  name: applicationInsightsName
  location: appInsightsLocation
  properties: {
    Application_Type: 'web'
  }
  kind: 'web'
}

resource functionApp 'Microsoft.Web/sites@2022-09-01' = {
  name: functionAppName
  location: location
  kind: 'functionapp,linux'
  properties: {
    reserved: true
    serverFarmId: hostingPlan.id
    siteConfig: {
      linuxFxVersion: linuxFxVersion
      appSettings: [
        {
          name: 'FUNCTIONS_EXTENSION_VERSION'
          value: '~4'
        }
        {
          name: 'FUNCTIONS_WORKER_RUNTIME'
          value: 'dotnet-isolated'
        }
        {
          name: 'APPINSIGHTS_INSTRUMENTATIONKEY'
          value: reference(resourceId('Microsoft.Insights/components', functionAppName), '2020-02-02').InstrumentationKey
        }
        {
          name: 'AzureWebJobsStorage'
          value: 'DefaultEndpointsProtocol=https;AccountName=${storageAccountName};EndpointSuffix=${environment().suffixes.storage};AccountKey=${storageAccount.listKeys().keys[0].value}'
        }
        {
          name: 'WEBSITE_CONTENTAZUREFILECONNECTIONSTRING'
          value: 'DefaultEndpointsProtocol=https;AccountName=${storageAccountName};EndpointSuffix=${environment().suffixes.storage};AccountKey=${storageAccount.listKeys().keys[0].value}'
        }
        {
          name: 'WEBSITE_CONTENTSHARE'
          value: toLower(functionAppName)
        }
        {
          name: 'WEBSITE_RUN_FROM_PACKAGE'
          value: packageUri
        }
      ]
    }
  }
  dependsOn: [
    applicationInsight
  ]
}