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This template provisions a function app on a Premium plan with production slot and an additional deployment slot. |
sample |
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function-app-deployment-slot |
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This sample Azure Resource Manager template deploys an Azure Function App with production slot and an additional deployment slot.
This template has a parameter functionPlanOS to choose Windows or Linux OS. Windows is selected by default. If you choose Linux, then parameter linuxFxVersion will be parameter, so you can skip it for Windows.
The Azure Function app provisioned in this sample uses an Azure Functions Elastic Premium plan.
- Microsoft.Web/serverfarms: The Azure Functions Premium plan (a.k.a. Elastic Premium plan)
The Function App uses the AzureWebJobsStorage and WEBSITE_CONTENTAZUREFILECONNECTIONSTRING app settings to connect to a Storage Account.
- Microsoft.Web/sites: The function app instance.
Azure Functions deployment slots allow your function app to run different instances called "slots". Slots are different environments exposed via a publicly available endpoint. One app instance is always mapped to the production slot, and you can swap instances assigned to a slot on demand.
Function apps running under the Apps Service plan may have multiple slots, while under the Consumption plan only one slot is allowed.
For Windows, do not need to set the WEBSITE_CONTENTSHARE setting in a deployment slot. This setting is generated for you when the app is created in the deployment slot.
- Microsoft.Web/sites/slots: The deployment slot for the function app.
For swapping the 2 slots, it is recommended to have 2 separate templates:
- First run this template successfully for deploying to slot using ZipDeploy.
- Then run this template for swapping slots.
The Zip Deploy extension is added for "deployment" slot along with recommended app setting WEBSITE_RUN_FROM_PACKAGE=1 to mount the zip package for deployment. This is the recommended path for deployment, except for Linux Consumption Plan
- Microsoft.Web/sites/slots/extensions: The ZipDeploy extension for "deployment" slot.
The Storage account that the Function uses for operation and for file contents.
- Microsoft.Storage/storageAccounts: Azure Functions requires a storage account for the function app instance.
Application Insights is used to provide monitor the Azure Function.
- Microsoft.Insights/components: The Application Insights instance used by the Azure Function for monitoring.
Tags: Microsoft.Storage/storageAccounts, microsoft.insights/components, Microsoft.Web/serverfarms, Microsoft.Web/sites, Microsoft.Web/sites/slots