AzureFunctionsIntroduction

This is Sample project for Azure Functions. May this repository help you understand Azure Functions better.

I strongly recommend you to use v2 samples. v1 and csx are limited and obsolated.

What you can know

Please refer v2/.

More Reference

Reference	Description
Blog post - tech.guitarrapc.com	Blog post for AzureFuncitons by repository owner.
Azure/Azure-Functions	AzureFunctions official repo. You may find where to report Issue, Feature Requests, Questions and Help.
Microsoft Azure WebJobs SDK Quick Reference	Web Job SDK cheat sheet.

Precompiled functions reference

Refer many samples and demo.

https://github.com/Azure/Azure-Functions/wiki/Samples-and-content

Following additional tips will be useful for first step.

Description	Screenshot
VS2017 Update3 and higher is required for v2.
Use v2 precompile function when you want to gain more faster execution and IDE compile, debug benefits.
Unfortunately `.csx` is not yet match friendly for VS Debugging. It will not detect compile error and less intellisense at all. Therefore you will find .csx will cause compile error on Function App portal so often. If you feel it reduce your efficiency, then use precompile instead.
There are several way for local debug with post/get request, LinqPad, PowerShell, curl and others. I use PostMan Chrome extensions heavily when local debugging and remote debugging.

Recommend Azure Functions settings for stability and efficiency

These settings are my recommendation with using AzureFunctions.

Description	Screenshot
Use `zipdeploy integration with Run From Package` to prove deploy atomic. PackageDeploy offers blue/green whole function deployment. In other words WebDeploy, ZipDeployment will not remove old name functions. You should consider using package deploy as possible as you can, and zip deploy is good PUSH Deploy option.	Announcing zipdeploy integration with Run From Package #110
Concider to select Dynamic Service Plan if possible. This will bring you best cost efficiency and scalability.
Keep your Azure Functions Runtime version up-to-date. Actually there's no meaning concider downtime because apply will be done in just a seconds.
Keep Function App Platform 32bit (don't change to 64bit)
Do not run out memory, add Dynamic Memory if needed! Default 128MB will be run out easiry. Upgrade to 256MB or higher as your app requires. Dynamic Plan pricing is relates to Memory size, but less meanful to concider. AzureFunctions pricing is here.
Make sure your functions memory comsumptions will be less than 1536MB. This is limiation of Dynamic Service Plan. In case you exceed 1536MB there's 2 options. - Divide to separate functions. - Combine all functions to single App Service Plan.
Use AppSettings to store secret values. This eliminate sensitive value in the source code. You can load it with both `System.Environment.GetEnvironmentVariable("Key")` or `System.Configuration.ConfigurationManager.AppSettings["Key"]`. C# sample with screenShot: `GetEnvironmentVariable("Secret_Value")` or `ConfigurationManager.AppSettings["Secret_Value"];` See C# Dev Samples for more details
`appsettings.json` is deprecated, use `local.settings.json` instead.
Fetch AppSettings on Remote Azure to local dev	install `npm i -g azure-functions-cli`, login `func azure login`, select subscription `func azure subscriptions list`, list functionapp ``func azure functionapp list`, then fetch to local` func azure functionapp fetch-app-settings AzureFunctionsIntroduction`. rename to local.settings.json and now all variables are fetched to local as like remote.
Use ConfigurationManager if possible.	ConfigurationManager is rather better for above fetch approatch, it can dectypt fetched encrypt data. ConfigurationManagerHelper will improve ConfigurationManager mutch friendly.
Set AzureWebJobsStorage for Timer Triggers or others.
Enable Managed Service Identity when using KeyVault or access to other azure resource. Then add AccessPolicy of KeyVault. But still cannot debug from local. Use Remote Debug.

Not Recommend

There's are possible but I never recommend. These settings will bring complexity.

Description	Screenshot
Don't use v1 from now. v2 is far more recommended.
Default TimeZone is UTC, but you can use LocalTime zone with `WEBSITE_TIME_ZONE` into Application Settings. You can obtain all timezone string with `System.TimeZoneInfo.GetSystemTimeZones()` Detail is here : Changing the server time zone on Azure Web Apps
To keep Deployment simplicity, I never recommend mix up Precompile functions and .csx functions.

License

MIT

License

guitarrapc/AzureFunctionsIntroduction

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