I am trying to create an Azure Function App. Before that, I created a free App Service plan. Now, as I am creating the function app, I don't see that plan in the dropdown, even though I use the same resource group, operating system and region for both plan and the function app. Thus I cannot create the function app. What am I missing?
As Specified in this MS Doc of Azure Functions Dedicated Plan, all other SKU's like Basic to Premium are allowed except F1 (Free Tier) in Azure Functions - Dedicated Hosting Plan:
Practical:
Result:
Related
I am just wondering if there is a path to migrate a Function App that is hosted on a Dedicated App Service Plan to a Premium Plan?
I have tried using the Azure CLI to change the underlying App Service Plan but am getting this message:
Your functionapp is not using a Consumption or an Elastic Premium
plan. Currently the switch is only allowed between a Consumption or an
Elastic Premium plan.
Is there any other way other than completely recreating the Function App to do this?
Function apps using the Dedicated App Service plan can't be changed to any other plan. This may be possible in the future, but not for now. You have to create a new function app in a different hosting plan and update/deploy your code.
Just like the error says, you can only switch between Consumption and Premium plans by changing the plan property of the function app resource.
References:
How to Migrate from Consumption Plan to App Service Plan (and vice versa)
Change Function app hosting plan
Background
My team is implementing disaster recovery via zone redundancy for our function apps. We currently have several function apps on a consumption app service plan. All of the apps and the service plan are in the same Azure region and in the same resource group. All of the apps run on Windows.
We need an elastic premium app service plan to enable zone redundancy for our function apps. As far as we can tell, the only way to create an elastic premium app service plan is to create a new function app.
Problem
When we use the Azure portal to create a new function app with a new elastic premium app service plan, the deployment fails.
Operation details > Status message gives some error details:
Requested feature is not available in resource group...
Try using a different resource group or create a new one.
How do we create a new elastic premium app service plan in our resource group?
We want to avoid moving our function apps to a different resource group if possible.
Related documentation
Azure Functions Premium plan
Create a Premium plan function app in the Azure portal
Create Azure website (app service) within a resource group with service plan with Powershell
How to deploy an Azure Functions App when the Service plan is in a different Resource Group
Unable to create Linux Function Apps (Consumption plan) and Linux App Service Plans and in the same Resource Group
Requested feature is not available in resource group...
Solution
We eventually figured out a workaround for moving our function apps to an elastic premium app service plan with zone redundancy:
Create a new resource group in the same Azure region as our function apps.
Create a new dummy fxn app in the new resource group, and choose an elastic premium plan during app creation. Zone redundancy will be enabled by default.
Delete the dummy fxn app and storage account. (Azure requires a storage account with each function app.)
Move the elastic premium plan to the old resource group.
Update the ARM template in our deployment pipeline to use the new elastic premium app service plan.
Delete the function apps. (Make sure your deployment pipeline works before doing this! We actually deleted one function app at a time.)
Redeploy the function apps via ARM template in the deployment pipeline.
We want to change the App Service Plan of an existing Azure Web App, from Isolated Service Plan to Isolated "v2" Service Plan. There are no changes in Subscription, Resource Group or Region. One condition for us is, we want to continue using same the Web App with the Plan alone changed. Please let me if this possible and how can we change this.
I could see the "Change App Service Plan" option in Azure Portal but I am unable to exactly find it out regarding the Plan change by dabbling in it.
We are able to create the required Isolated V2 Plan separately but we are unable to switch the Web App to the new Plan so far.
Referring the Microsoft documentation, I keep coming across that different kinds of App Service Environments(ASE) are used for the above Plans, it is not clear due to different ASEs, the Plan change is possible or not.
For quick reference, I have sketched out my query below:
Azure Web App : Web-App-1
App Service Plan : Isolated Service Plan
to
Azure Web App : Web-App-1
App Service Plan : Isolated V2 Service Plan
(Same Region, Subscription and Resource Group)
when you try and change to the new ASP, Azure will perform a check to see if it is a valid move, so as long as you can see it in the destination combo box uner the change app service plan option you can try and let azure evaulate if the move is possible.
If you cannot see it as a destination then you might be able to clone the ASP because the two ASP's you have might be in a different webspace which you cannot do anything about.
Change App Service Plan from Isolated to Isolated V2 Plan for a Web App
I keep coming across that different kinds of App Service Environments(ASE) are used for the above Plans, it is not clear due to different ASEs, the Plan change is possible or not.
The private environment used with an Isolated plan is called the App Service Environment v2 and with Isolated v2 Service Plan is called the App Service Environment v3.
Apps can only move between plans that are created in the same webspace, where webspace is a internal deployment unit of App Service Plan.
Apps cannot be moved between plans in different App Service Environments.
Make sure you created the App Service Environment v3 to change your web app to Isolated V2 SKU.
To know more information on changing the app service plans along with its SKU Sizes and its limitations, please refer this Microsoft Documentation and regarding the app service environments versions of Isolated Plans, refer App Service pricing.
What is different azure function app and app service plan ?
I think;
Function app is a core layer - where hosted code and execute
App service plan is higher layer of function app - it can be covering function app. For example, it can cover network layer for function app.
But I see in function app has Vnet integration feature and app service plan has virtual network integration too.
I am confused with it.
What is different azure function app and app service plan in network part ?
p/s: I have created virtual network and assign app service plan to that VNET. then I deployed a function app into app service, but this function does not stay in that VNET. how to verify that ?
There are a few things that will help you to understand this little better and you can also verify through Azure Portal. After all, it's all the hosting plan you want to use.
App Service Plan: This is something a root consumption plan you are paying for. kind of resources you want for much of your work. (I would say - choose this wisely)
Function App: This resource has 3-4 different kinds of hosting plan options
(i) Consumption plan (ii) Premium Plan (iii) App Service Plan (iV) ASE.
now, if you have notice - App Service Plan (item iii) is also one of the options. Not necessary that is only an option. So, in other words; Function App can sit outside the App Service plan (like Consumption plan) where it will deploy separately.
At this moment Question might come - what could be a difference. for that visit Microsoft's well-documented link here which states you are paying and resources are getting allocated during the function real-use whereas, App Service Plan uses your own app Dedicated service plan which you already have decided a lot earlier in the cycle.
Your last question - How do we confirm? well, Open App Service Plan inside Azure Portal and there is an essential section where you will find App(s)/ Slot(s). Click on that you will see how many app services/ function apps already sharing that specific App Service Plan like below:
An App Service Plan is the environment which you pay for.
You can then run different workloads including function apps within the App Service Plan. Grouping workloads in a single App Service Plan can save you money compared with having different App Service Plans for each App Function.
The VNET configuration is both at the App Service Plan and the App Service / Function App level. You do not necessarily want all App Services / Function Apps in the same App Service Plan to run on the same VNET.
The consumption plan is based on function runtime, which means only when your function is running else no.
Premium plan you need to specify prewarmed instances that will always be online. so it's kind of minimum fixed billing and it can go beyond if you use it for resources.
The app service plan (Dedicated plan) is Running function like other apps. It will use the same app service plan.
Refer to this documentation for more details.
I have created 1 node.js and 1 java Azure Function, using VS Code
When I have deployed just these 2 functions to Azure using VS Code, I ended up with this many Azure resources (see the picture below).
Is there a way to re-use the same resource type (i.e. App Service, Storage Account, etc..) to host multiple Azure Functions?
Absolutely, we do this all the time. We usually create resources in the portal by hand the first time and later use deployment scripts (msdeploy or Powershell) to update the resources.
When you create a new Function App in the portal, you can tell Azure to put the new Function App in an existing App Service Plan and also set it to use existing storage:
You can also do this using Azure CLI if you are a CLI guy.