September 2019
Intermediate to advanced
154 pages
3h 31m
English
Content preview from Building Intelligent Cloud Applications
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Chapter 4. Getting Started with Microsoft Azure Functions
In this chapter, we show you how to start creating serverless applications using Azure Functions, write basic functions using the Python programming language, and use Azure Blob to store and retrieve files and data.
Azure Functions
To begin working with Azure Functions, first you must understand the terminology that Azure uses for these services:
- Functions
-
We call various functions in response to different events and return a result. Our functions are stateless in general but can interact with databases and other resources. With Azure Functions in the Consumption plan (pay-per-execution pricing model), functions by default should take no more than five minutes to execute. You can extend this to 10 minutes by changing the timeout property.
- Function Apps
-
Several functions are grouped into Apps, which share a domain name for URI and other configurations. The Function App is the unit of scale. When the Function App is scaled out, additional resources are allocated to run multiple instances of the Azure Functions host. Conversely, as compute demand is reduced, the scale controller removes function host instances. The number of instances is eventually scaled down to zero when no functions are running within a Function App.
- Functions Project
-
This usually refers to the local folder in which all source code is stored for a particular Function App.
- Resource group
-
A collection of resources that share the same life cycle, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.