Deploying the Functions runtime as a private site extension

If you already have a Function App, you can use the following steps to deploy your own Functions runtime as a private site extension. Note: these steps only work on Functions Apps on a regular App Service Plan and not on Function Apps on a Consumption Plan.

• First you need a Functions.Private.zip site extension package in the proper format
  • you can get one from our CI machine output for a particular build, e.g. https://ci.appveyor.com/project/appsvc/azure-webjobs-sdk-script-y8o14/build/1.0.10650/artifacts
  • or you can build the private package yourself:
    • In VS, right click the WebJobs.Script.WebHost project and choose Publish
    • Select the existing FileSystem profile and click Publish. This will create the bits under src\WebJobs.Script.WebHost\Publish\SiteExtension
    • Zip up the SiteExtension folder to produce a Functions.Private.zip file
• Go to the Kudu Console for the Function App that you want to use your bits on. Make sure you use a Function App on a regular App Service Plan (i.e. not Consumption), or it will not work. (You can determine this by looking at the WEBSITE_SKU environment variable in kudu. It should be "standard", not "dynamic". The functions.azure.com portal creates dynamic skus. You can create a standard sku via the Ibiza portal)
• Drag and drop the Functions.Private.zip into the root of your Kudu Console. i.e. this should create d:\home\SiteExtensions\Functions
• In the Kudu Process Explorer, kill the main site (the w3wp that doesn't say scm)
• To verify that you are running the runtime version you expect, browse to the host status endpoint at https://<functionappname>.azurewebsites.net/admin/host/status?code=<masterkey> and check the version returned.

You are now using your private Functions runtime.