Build Micro Service landscape with Azure Functions Mattias Lögdberg

Mattias Lögdberg Solution Architect Azure Specialist Microsoft MVP http://mlogdberg.com MLogdberg https://se.linkedin.com/in/logdberg

Building a micro service landscape Small components Scaling Throttling (even out workloads) Events Create a facade

Mono-lithic application Inside client app Complex framework Outside client app Micro- functionality Loosely coupled components

Learn the icons

Scenario based, requirements Recieve data via HTTPS Store data Provide API for external consumers Detect updates and provide change feed to other systems (pub/sub) Keep track of what is happening

Scenario Drawing time

Some context

Bindings Standard functionality Smaller and more focused Functions Less code https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-cosmosdb-v2

Scaling On instance level (server) On thread level (threads per instance) https://docs.microsoft.com/en-us/azure/azure-functions/functions-host-json https://docs.microsoft.com/en-us/azure/azure-functions/functions-app-settings https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-service-bus#host-json https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-cosmosdb-v2#host-json

Lets start! put /product/{id}

Monitoring Scaling Errors Performance Live Stream https://docs.microsoft.com/en-us/azure/azure-functions/functions-monitoring Lets’ watch how this goes (runner) https://docs.microsoft.com/en-us/azure/azure-monitor/app/correlation

All good? Load test

Monitoring End to End https://docs.microsoft.com/en-us/azure/azure-functions/functions-monitoring Lets’ watch how this goes (runner) https://docs.microsoft.com/en-us/azure/azure-monitor/app/correlation

Lets add an API get /product/{productnumber} put/product/{id}

Update Events in Cosmos https://docs.microsoft.com/en-us/azure/cosmos-db/change-feed

Custom Bindings / Extensions Event Grid https://github.com/fbeltrao/AzureFunctionExtensions https://github.com/fbeltrao/AzureFunctionExtensions

Lets add Update Event’s get /product/{productnumber} put /product/{id}

Reflection get /product/{productnumber} put/product/{id}

Mono-lithic application Inside client app Complex framework Outside client app Micro- functionality Loosely coupled components

Lessons learned Design is important Security on end user is often important when used with mobile apps Facade’s help remodel, handle change is key to success Micro Service landscape boost innovation Good CI/CD story helps for change and rapid development For End To End tracking use same Application Insights Problem deploying? Due to locked files MSDEPLOY_RENAME_LOCKED_FILES=1

Questions?

Thanks! Mattias Lögdberg, Solution Architect Email: mattias.logdberg@ibiz-solutions.se