What is Azure Function?

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what are azure functions

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before we discuss actual functions, let's see what Serverless means.

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Here is one of the simplest definitions of serverless computing you'll find on the web.

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Survivalists is an execution model where the cloud provider is responsible for executing a piece of cold, also known as a function. By dynamically allocating the resources for its execution,

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there are few important things to remember about service.

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First,

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the cloud vendor is in control of the environment, which means that you need to pay attention to the runtime versions in dependencies.

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Most of the time, you can bring your own dependencies, but you should testing compatibility issues. Also, this may have an impact on the security of your serverless. Simply application.

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Second, the runtime is dynamically created.

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Quite often. This is done with the help of containers and depending off how many dependencies you have the start time of your function maybe longer.

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Most of the time functions are stateless, which means that you cannot save data locally and rely that you will be able to access it between runs.

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Of course, now cloud vendors, including Asher, offer the so called durable functions where you can share stayed between runs.

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Despite this, they're certain architectural and design Parton's that you should follow when working with serverless.

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Last but not least, the execution time of for serverless applications is limited.

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What that means is that they cannot be long running and often not limited to several minutes.

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If you're cold doesn't complete within the hour time, it will be terminated automatically by the vendor.

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This means is that you should implement small, well defined tasks that can be executed relatively fast.

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Actual function is a service on Azur that allows you to run server less applications.

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Azure functions, is targeted to application developers and develops people who are interested in implementing functionality and don't want to deal with managing infrastructure

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actually has other services that allow you to run serverless applications that we'll discuss in the next lecture.

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Azure functions allow you to choose from several programming or scripting languages, including C Sharp Java, JavaScript, Fight on Power Shell and others.

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It has integrated security, allowing you to protect your http, triggered functions with a lot

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providers like Azure, Active Directory, Google, Twitter, Facebook or Microsoft account.

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It also integrates with azure key vote that you can use to store configuration secrets.

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We will look at those in detail in one of the models in this course.

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Azure functions have also simplified integration with other actual services like azure storage event. Great cost mostly be or TWILIO.

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Development of factual functions allows you to use various develops tools like get cup and national develop services for continuous integration and continues delivery

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and last azure functions. Runtime is open source and available in Get Cup.