Serverless compute has completely revolutionised the way we architect and design systems, but how does that translate into the real world? In this session we’ll dig a bit deeper into architectural best practices and anti-patterns for Azure Functions, and have a look at some real life, production, Azure Function use cases.

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3. Real Life Azure Functions
Architecture
Scott Holden
AppDev TSP @ Microsoft

5. Azure Serverless Ecosystem

6. Generally available
GitHub:
Azure/azure-functions-nodejs-worker
Public preview
GitHub:
Azure/azure-functions-java-worker
New!
Private preview
GitHub:
Azure/azure-functions-python-worker
Build Your Own!
https://github.com/Azure/azure-functions-host/wiki/Language-Extensibility
https://github.com/radu-matei/azure-functions-golang-worker

7. Functions 1.0 Functions 2.0
.NET Support .NET Framework 4.7.1 .NET Core 2.1
Assembly isolation No Yes
Bindings versions Runtime versions User controlled
Language options Limitations in languages and versions Languages are external to the host
Node.js version Node.js 6 only Node.js 8 & 10 + future versions
Node.js native modules Not supported Supported
HTTP triggers HTTP and specialized Webhooks HTTP (supports Webhooks)
Language Runtime Multiple languages per function app Single language per function app
Functions Proxies GA GA
OpenAPI definition Preview Not yet available
Observability Application Insights/WebJobs dashboard App Insights

8. Platform
Application delivery
Operating system
●●● ●●●
●●●
+
https://github.com/azure/azure-functions-host (+others)
Azure Functions
host runtime
Azure Functions
Core Tools
Azure Functions
base Docker image
Azure Functions
.NET Docker image
Azure Functions
Node Docker image
●●●

23. User
probe probe
Global Private
WAN
Connection
pooling
Active global traffic
routing
Azure Region 1 Azure Region 2
64 global edge POPs
Path based traffic load balancing
Static content caching
Application layer security

38. VisibilityTimeout: 30s

41. Orchestrator
Function
Activity
Function
Starter
Function
Activity
Function
Activity
Function

42. public static async Task<object> Run(DurableOrchestrationContext ctx)
{
try
{
var status = await ctx.CallActivityAsync(“Start");
while (!status.Completed)
{
status = await ctx.CallActivityAsync(“CheckStatus", status);
var nextCheck = ctx.CurrentUtcDateTime.AddHours(1);
await ctx.CreateTimer(nextCheck, CancellationToken.None);
}
return await ctx.CallActivityAsync(“Completed", status);
}
catch (Exception)
{
// global error handling/compensation goes here
}
}
Orchestrator Function
Activity Functions

46. Foo: mysecret
Foo: mysecret
Foo: mysecret
Foo: reference
Foo: mysecret

48. Questions?