Azure Functions let us execute our code in a serverless environment. This does not require create a solution or publish it as Azure Apps. In short, just focus on code and your functional aspect, and don’t need to worry about infrastructure. Azure Function, can be used in different business scenarios and with different integration aspects. In this post let’s try and create a basic Azure Function from Azure portal.
Step 1- Create Azure Function App
Navigate and Login to your Azure Portal
From New -> Compute -> Select Function App, or Search Function App in the Search the marketplace box
Fig: Select Function App service in Azure Portal
Then Create the Function App, by providing all required details including App Name, Subscription Details, Hosting Plan etc.
Fig: Create new Function App
It may take a while to provision a new Function App. Once the process is completed, you will have the following screen:
Fig: Function App is Created
Step 2 – Add New Function in Function App
Add a New Function, by clicking on the “+” icon in the Function option
Fig : Adding a new function in Function App
Selecting New option would launch the quick start page from where you select some predefined scenarios such as Web Hook + API , Timer and Data Processing along with Language – “ C# or Java Script.
Fig: Select type of function
You can also create your own custom function too. For now, select the Webhook + API and C# language and click the “Create this function” button
Step 3 – Function Code / Write Your Custom Code
With that you will find a default HttpTrigger function created. That function is nothing but a self-contained method which accept a HttpRequestMessage and return HttpResponseMessage.
Fig: Function Code and Run it
You can run the function, and pass a test parameter to test it out. This code is just an example comes with the template that we choose, where you can see without worrying of solution or other infrastructure, we can run a module. You can write you custom logic, use them with in a function and access them for an external application.
Step 4- Test Your Function
Click on the </> Get Function URL button in the top-right corner, it will show you the Function URL.
Fig : Get the Function URL
Use the URL from any of your client application and pass the required parameter! Following screen shots shows using the Azure Function from Postman Client.
Fig: Testing your Azure Function
You can also use this URL and integrate with your custom app and call the as like other end points.
Step 5 – Monitor your Function Invocation
Select the Monitor Tab in the tree, to view details of Invocation Log for your function
Fig: Azure Function Monitoring
This post just talk about initial introduction of Azure Function, and how to create you first Azure Function. In the next few post we will discuss some more details on Azure Functions.
Hope This helps !