Introduction to Azure App Service Environment Boston Code Camp, March 2017 Jason Haley jason@jasonhaley.com

Azure App Service Family Web Apps Web apps that scale with your business Mobile Apps Build mobile apps for any device Azure App Service is a PaaS offering that comprises four separate (but related) services: Web Apps is a fully managed compute platform optimized to host Web sites and Web applications Mobile Apps provides infrastructure for hosting back-ends for mobile apps -- for example, it provides infrastructure for sending push notifications not only to Windows clients, but to iOS and Android clients as well API Apps makes it easy to host APIs in the cloud, features integrated support for Swagger (http://swagger.io/), and offers a built-in authentication service for restricting access to APIs Logic Apps allows you to automate business processes and workflow -- for example, automatically finding negative tweets about your company and sending notifications to a Slack channel Together, these services comprise a ready-made solution to many of the challenges involved in publishing Web sites, Web apps, Web services, mobile apps, and more. Logic Apps Automate business processes across SaaS and on-premises API Apps Build and consume APIs in the cloud

Demo Lap around the public app service

App Service Environment (ASE) Premium tier service plan option Highly scalable For scenarios that need high RPS like the CBC News Benchmarked 25K RPS (HTTP) and 20K RPS (HTTPS) Isolated and secure Control inbound and outbound traffic Miniaturized version of Azure App Service Will only contain your apps Scale up to 50 compute resources across 3 worker pools P1 – P4 scaling options

Differences Dedicated compute resources Created in a virtual network Not sharing infrastructure with other peoples web apps Minimum of four machines Created in a virtual network Needs its own subnet Network security groups (NSG) to lock down VNET Can access other resources on its VNET Can be Internal or External Allows you to protect upstream using WAF

What makes an ASE? Virtual Machines Azure SQL Database Azure Storage VNet subnet DNS

Network Architecture From https://docs.microsoft.com/en-us/azure/app-service-web/app-service-app-service-environment-network-architecture-overview

A look back at TechEd 2012 Windows Azure Web Sites: Under the Hood Yochay Kiriaty, Craig Kitterman

Machine Roles Front Ends Worker Pools Http/Https endpoints for apps in ASE Load balance passing traffic to workers Minimum of P2 size and 2 instances Worker Pools Hosts/runs your apps Limit of 3 worker pools (with up to 50 workers) Minimum of 2 instances (can be P1 – P4)

Somethings can’t change Location Subscription Resource Group VNet used Subnet used Subnet size (the ASE is in) /25 is a good size

Demo Take a look at external and internal App Service Environments

Scaling of ASEs Front Ends Worker Roles Monitor memory and CPU Depends on traffic load (not so much work load of apps) Can auto and schedule scaling Worker Roles Scaling out is slow (can take 3 hours) Depends on Update Domains – 2 only workers = 1 usable Need to have extra workers available to scale Depends on load of the app service plans

Resources Episode 213: Azure App Service Best Practices for Large Scale Applications (CBC News voter app) https://channel9.msdn.com/Shows/Cloud+Cover/Episode-213-Azure-App- Service-Best-Practices-for-Large-Scale-Applications Deploying highly scalable and secure web and mobile apps https://azure.microsoft.com/en-us/resources/videos/azurecon-2015- deploying-highly-scalable-and-secure-web-and-mobile-apps/ Deep Dive into Azure App Service: A Platform to Build Modern Applications (starts ~23:58) https://mva.microsoft.com/en-US/training-courses/deep-dive-into-azure-app- service-a-platform-to-build-modern-applications- 16828?l=YNraRQR4C_604668937 Cidir at least /25