Create a function in Azure that is triggered by a timer
Learn how to use Azure Functions to create a serverless function that runs based a schedule that you define.
To complete this tutorial:
- If you don't have an Azure subscription, create a free account before you begin.
Create an Azure Function app
Select the Create a resource button found on the upper left-hand corner of the Azure portal, then select Compute > Function App.
Use the function app settings as specified in the table below the image.
Setting Suggested value Description App name Globally unique name Name that identifies your new function app. Valid characters are
Subscription Your subscription The subscription under which this new function app is created. Resource Group myResourceGroup Name for the new resource group in which to create your function app. OS Windows The language options available depend on the OS of the function app. For example, Python requires Linux. Hosting plan Consumption plan Hosting plan that defines how resources are allocated to your function app. In the default Consumption Plan, resources are added dynamically as required by your functions. In this serverless hosting, you only pay for the time your functions run. When you run in an App Service plan, you must manage the scaling of your function app. Location West Europe Choose a region near you or near other services your functions access. Runtime stack Preferred language Choose a runtime that supports your favorite function programming language. Choose .NET for C# and F# functions. Storage Globally unique name Create a storage account used by your function app. Storage account names must be between 3 and 24 characters in length and may contain numbers and lowercase letters only. You can also use an existing account, which must meets the storage account requirements. Application Insights Default Creates an Application Insights resource of the same App name in the nearest supported region. By expanding this setting, you can change the New resource name or choose a different Location in an Azure geography where you want to store your data.
Select Create to provision and deploy the function app.
Select the Notification icon in the upper-right corner of the portal and watch for the Deployment succeeded message.
Select Go to resource to view your new function app. You can also select Pin to dashboard. Pinning makes it easier to return to this function app resource from your dashboard.
Next, you create a function in the new function app.
Create a timer triggered function
Expand your function app and click the + button next to Functions. If this is the first function in your function app, select In-portal then Continue. Otherwise, go to step three.
Choose More templates then Finish and view templates.
In the search field, type
timerand configure the new trigger with the settings as specified in the table below the image.
Setting Suggested value Description Name Default Defines the name of your timer triggered function. Schedule 0 */1 * * * * A six field CRON expression that schedules your function to run every minute.
Click Create. A function is created in your chosen language that runs every minute.
Verify execution by viewing trace information written to the logs.
Now, you change the function's schedule so that it runs once every hour instead of every minute.
Update the timer schedule
Expand your function and click Integrate. This is where you define input and output bindings for your function and also set the schedule.
Enter a new hourly Schedule value of
0 0 */1 * * *and then click Save.
You now have a function that runs once every hour.
Clean up resources
Other quick starts in this collection build upon this quick start. If you plan to work with subsequent quick starts, tutorials, or with any of the services you have created in this quick start, do not clean up the resources.
Resources in Azure refers to function apps, functions, storage accounts, and so forth. They are grouped into resource groups, and you can delete everything in a group by deleting the group.
You created resources to complete these quickstarts. You may be billed for these resources, depending on your account status and service pricing. If you don't need the resources anymore, here's how to delete them:
In the Azure portal, go to the Resource group page.
To get to that page from the function app page, select the Overview tab and then select the link under Resource group.
To get to that page from the dashboard, select Resource groups, and then select the resource group that you used for this quickstart.
In the Resource group page, review the list of included resources, and verify that they are the ones you want to delete.
Select Delete resource group, and follow the instructions.
Deletion may take a couple of minutes. When it's done, a notification appears for a few seconds. You can also select the bell icon at the top of the page to view the notification.
You have created a function that runs based on a schedule. For more information about timer triggers, see Schedule code execution with Azure Functions.
Now that you have created your first function, let's add an output binding to the function that writes a message to a Storage queue.