af-cop

af-cop (Azure Functions - Change of Plans!) is a small PowerShell script to swap your App Service Plans.

Use it to swap your Azure Functions Plan from Consumption Plan to Premium and vice versa! When switching to premium, it will create a Premium Plan. If you switch back to consumption plan, it will delete the Premium Plan, so you don't have to pay for it.

Check out the parameter documentation for more info!

Motivation

Sometimes you need to have pre-warmed instances - like for a game launch! You know that for a certain period of time, you will have a very big influx of traffic. So for this time, you want to switch to a Premium Plan. Later, when the traffic has normalized, you want to go back to Consumption Plan.

To make these operations simpler (because you cannot do the switch back and forth via the Azrue Portal), I created this script based on Stefano Demiliani's blog-post

Warning/Disclaimer

The usage of this script is at your own peril. Neitehr myself nor my emplyoer will take any liability on what you do with it! Please be advised that by using this script, you can break your Function App!

Premium Plan has a constant cost, depending on the Plan you choose
premium Plan has some additional features over Consumption Plan. If you intend to go back to Consumption plan, do nto use featrues like VNETs which would break on a Consumption Plan!

Examples:

Comsumption ➡ Premium Plan:

Note: -Sku EP2 will use a EP2 Plan. Defaults to EP1

.\af-cop.ps1 -resourceGroup function-app-rg -consumptionPlanName ASP-consumption -premiumPlanName ASP-premium -functionAppName function-swap-app -toPremium $true -Sku EP2

Premium ➡ Comsumption Plan:

.\af-cop.ps1 -resourceGroup function-app-rg -consumptionPlanName ASP-consumption -premiumPlanName ASP-premium -functionAppName function-swap-app -toPremium $false

Thanks

Many thanks to Stefano Demiliani, on whose blog-post this script is based on!