Azure web apps

About Me
Vaibhav Gujral
http://vabgujral.wordpress.com
Twitter: @vabgujral
GitHub: vabgujral
Skype: vaibhav.gujral
gujral.vaibhav@hotmail.com
 Technical architect with 11+ years of
extensive experience in designing,
architecting, developing and delivering
enterprise class applications.
 Building Azure Solutions since 2010
 Full Stack Developer. Key skills include
.Net technologies, AngularJS, SQL

Agenda -
 Azure App Services Overview
 Azure App Service Plans
 Azure Web Apps
 Overview
 Deploying Web Apps
 Diagnostics & Monitoring
 Networking support
 Scaling Web Apps
 Testing Web Apps

Azure App Service
 Integrated Cloud App Platform for delivering apps across cloud and mobile
devices
 Runs on fully managed virtual machines
 No Remote desktop support
 Azure App Services include the following services
 Web Apps – That scale with your business
 Mobile Apps – create mobile backend services for any device
 Logic app – Automate business process across SaaS and on premises
 API App – Easily build and configure

Full capability set available including:
 .NET, Node.js, Java, PHP, and Python
 WebJobs for long running tasks
 Integrated VS publish, remote debug…
 CI with GitHub, BitBucket, VSO
 Auto-load balance, Autoscale, Geo DR
 Virtual networking and hybrid connections
 Site slots for staged deployments
 Earlier called as “Web Sites”

New capabilities for Mobile apps:
 Webjobs for long running tasks
 CI with GitHub, BitBucket, VSO
 Auto-load balance, Autoscale, Geo DR
 Virtual networking and hybrid connections
 Site slots for staged deployments
 Supports Push notifcations
 Earlier called as “Mobile Services”

New Logic Apps for easy automation
 No code designer for rapid creation
 Dozens of pre-built templates to get started
 Out of box support for popular SaaS and on-premises
apps
 Use with custom API apps of your own
 Biztalk APIs for expert integration scenarios

Easily use cloud or custom APIs:
 Dozens of built-in APIs for popular SaaS
 An ecosystem of APIs for any need
 Create and publish custom, reusable APIs
 Visual Studio tooling with one click publish and
remote debugging
 Automatic client SDK generation for many languages

Azure App Service
 All app types are part of Azure App Service
 Each one can use the features of the others
 No real difference except name and icon
 All app types share the same native Azure features like Resource Manager,
RBAC etc.
 The word app refers to the hosting resources dedicated to running a
workload.
 If an application is composed of a web front end and a RESTful API back
end we could:
 Deploy both (front end and API) to a single web app
 Deploy front-end code to a web app and back-end code to an API app

Azure App Service Benefits
 Multiple languages and frameworks - App Service has first-class support for
ASP.NET, Node.js, Java, PHP, and Python. PowerShell and other scripts or
executables are supported on App Service VMs.
 DevOps optimization – Supports continuous integration and deployment
with Visual Studio Team Services, GitHub, or BitBucket. Promote updates
through test and staging environments. Perform A/B testing. App Service
can be managed by using Azure PowerShell or the cross-platform
command-line interface (CLI).
 Global scale with high availability – Can be scaled up or out manually or
automatically. Apps can be hosted anywhere in Microsoft's global
datacenter infrastructure, and the App Service SLA promises high
availability.

Azure App Service Benefits
 Connections to SaaS platforms and on-premises data - Choose from more
than 50 connectors for enterprise systems (such as SAP, Siebel, and Oracle),
SaaS services (such as Salesforce and Office 365), and internet services
(such as Facebook and Twitter). Access on-premises data using Hybrid
Connections and Azure Virtual Networks.
 Security and compliance - App Service is ISO, SOC, and PCI compliant.
 Application templates - Choose from an extensive list of application
templates in the Azure Marketplace including popular open-source
software such as WordPress, Joomla, and Drupal.
 Visual Studio integration - Dedicated tools in Visual Studio streamline the
work of creating, deploying, and debugging.

 App Service Plans represent the collection of physical resources used to
host applications
 App Service Plans include –
 Region (Central US, West US etc.)
 Scale count (one, two or three instances etc.)
 Instance Size (S/M/L)
 SKU(Free, Shared, Basic, Standard, Premium)
 All applications within Azure App Service runs in an App Service Plan
 Apps in same subscription, region and resource group can share an App
Service Plan
 An app can be moved between App Service plans within same resource
group and geographical regions
Azure App Service Plans

An app should go into a new App Service plan when:
 App is resource-intensive.
 App has different scaling factors from the other apps hosted in an existing
plan.
 App needs resource in a different geographical region.
 App needs new set of resources
 You need greater control on the app
 App Service plan determines the cost and not the number of apps hosted
in it.

App Service Plans can be created-
 Stand-alone
 As Part of the app
NOTE-
App Service plans that have no apps associated to them still incur charges
since they continue to reserve the compute capacity.
To avoid unexpected charges, when the last app hosted in an App Service
plan is deleted, the resulting empty App Service plan is also deleted.

 New-AzureRmAppServicePlan
 Get-AzureRmAppServicePlan
 Set-AzureRmAppServicePlan
 Remove-AzureRmAppServicePlan
Powershell commands for Azure App
Service Plans

Creating Azure Web App using
Command Line options
 The New-AzureRmWebApp cmdlet creates an Azure Web App in a given
resource group that uses the specified App Service plan and data center.

Powershell Commands for Web Apps
 New-AzureRmWebApp
 Remove-AzureRmWebApp
 Set-AzureRmWebApp
 Restart-AzureRmWebapp
 Stop-AzureRmWebapp
 Get-AzureRmWebAppPublishingProfile
 Reset-AzureRmWebAppPublishingProfile

Creating Azure Web App using
Command Line options
 The az webapp create cmdlet creates an Azure Web App in a given
resource group that uses the specified App Service plan.

Azure CLI Commands for Web Apps
 az webapp browse
 az webapp create
 az webapp delete
 az webapp list
 az webapp restart
 az webapp show
 az webapp start
 az webapp stop

WebJobs
 Run background long running programs or scripts in the same context
 Three ways of running web jobs:
 On-demand
 Continuously
 Scheduled
 Cost covered in App Service
 Azure WebJobs SDK supports common tasks like image processing, queue
processing, file maintenance, sending emails etc.
 WebJobs SDK includes
 Nuget Packages – for decorating methods with attributes
 Dashboard – provides rich monitoring & diagnostics

WebJobs
Accepted file types include:
 .cmd, .bat, .exe (using windows cmd)
 .ps1 (using powershell)
 .sh (using bash)
 .php (using php)
 .py (using python)
 .js (using node)
 .jar (using java)

Deployment Slots
 Deploy to a separate deployment slot instead of the default production
slot
 Supported in Standard or Premium tiers
 Each slot has its own app hostname
 App content and configuration can be swapped between two slots
 Benefits
 Validation of changes before moving to production
 All instances are warmed up before swapping, ensuring zero downtime
 Easy swap to “last known good site”

Kudu
 Troubleshooting and Analysis tools available for use within Azure Web Apps
 https://xxxxxxxx.scm.azurewebsites.net
 ‘Buddy site' to the real Azure site
 Runs in same sandbox but different process
 Provides cmd and powershell console
 View Streaming logs
 Download memory dump
 Verify environment variables and app settings
 Web jobs & functions
 Web hooks and deployment hooks

App Service Editor – currently in preview

Visual Studio Support for Web
Apps

Remote Debugging
 Visual Studio supports remote debugging
 Set breakpoints or manipulate memory directly
 Step through code or change the code path
 Not supported in Express editions of Visual Studio
 Also supported by continuous web jobs and not by scheduled/on-demand
 Enable Remote Debugging in Azure portal

Application Insights
 Extensible Application Performance Management (APM) service for web
developers on multiple platforms
 Useful in monitoring live web applications
 Pulls telemetry information such as performance counters, Azure
diagnostics etc
 Supports .Net, NodeJs and J2EE
 Supports apps deployed on-premises or in the cloud
 Very minimal impact on app performance as tracking calls are non-
blocking, batched and sent in separate thread

Application Insights
Application Insights is aimed at the development team, to help you understand
how your app is performing and how it's being used. It monitors:
 Request rates, response times, and failure rates
 Dependency rates, response times, and failure rates
 Exceptions
 Page views and load performance
 AJAX calls
 User and session counts.
 Performance counters
 Host diagnostics from Docker or Azure.
 Diagnostic trace logs
 Custom events and metrics

Scaling Web Apps
 Two options:
 Scale Up – Increase the VM size by getting more CPU, memory, disk space etc.
Can be done by changing the pricing tier of the app service plan.
 Scale Out – Increase the number of instances up to a maximum of 20 instances.
Application. Can be done manually or automatically based on metrics like CPU
percentage and memory utilization
Further, an App Service Plan can be scaled to accommodate-
 Changes in Pricing Tier
 Changes in Instance Size
 Changes in Instance Count

Auto Scaling Web Apps
 Allowed Metrics:  Allowed Operations:

Azure Traffic Manager
 Load balance among app instances deployed across regions
 Uses the following algorithms
 Performance (Fastest)
 Weighted (Round-robin)
 Priority (Failover)
 DNS based load balancer where clients connect directly to the endpoints
 Traffic manager is resilient to failures including the failure of entire Azure
Region
 Benefits include traffic distribution and endpoint health monitoring
 Traffic Manager is not a proxy or a gateway

Azure CDN
 Secure, reliable content delivery with global reach
 Publicly available objects can be cached like images, style sheets, documents,
files, html pages and client side scripts
 CDN can also be utilized for serving dynamic content like PDF reports based on
user inputs
 Results in low latency and faster content delivery in comparison to the content
delivery from data center where application is hosted
 Helpful in reduction in application load resulting in improved application
performance and scalability.
 Helpful in bringing costs of content delivery down
 Works with Azure blob storage, web apps, virtual machine, application folder, or
other HTTP/HTTPS location

Web App Backup
 Create app backups manually or on schedule
 Backups can be restored to a snapshot of a previous state by overwriting
existing app or restoring to another app
 App Service can backup the following information to an Azure storage
account and container that you have configured your app to use.
 App configuration
 File content
 Database connected to your app
 Supported in Standard and Premium tiers
 Backups can be up to 10 GB of size including app and database content

Web App Cloning
 Clone existing apps to a newly created app
 New app can be in same region or different region
 Supported only in premium tier
 Following settings are not copied in to the new app:
 Azure Traffic Manager settings and Auto Scale Settings
 Backup schedule settings
 VNET settings
 App Insights
 Kudu Extension
 Database Content

App Service Migration Assistant
 http://movemetothecloud.net
 Migrate web sites from Windows and Linux servers to Azure app service
 Tool creates web app + database on Azure, if required
 Supports Windows Server 2003 onwards

App Service Environment
 Premium service plan option of Azure App Service
 Provides a fully isolated and dedicated environment for securely running
Azure App Service apps at high scale
 Ideal for application workloads requiring:
 Very high scale
 Isolation and secure network access
 ASEs can be created within a single Azure region or span across multiple
regions making it idle for horizontal scaling
 Isolated for a single customer’s applications
 Always deployed in a VNet

Hybrid Connections
 Based on Azure Biztalk Services
 Easy and convenient way to connect the app service to on premises
resources behind firewall

VNET Integration
 Allows to place Azure web apps in a non-internet route-able network
having controlled access
 App Service Environment is deployed into VNET
 VNET Integration gives web app access to resources in virtual network but
does not grant private access to web app from the virtual network
 Private site access is only available with an ASE configured with an Internal
Load Balancer (ILB)
 Use case includes connecting Azure web app to a database or a web
service running on a virtual machine in Azure Virtual Network.
 Part of standard or Premium tier
 Supports TCP and UDP

Performance Test
 Performance test web apps for free in the Azure Portal
 These tests simulate user load on the app over a specific time period
 Measures app's response

Testing in Production
 Live-testing web app using live customer traffic
 Traffic Routing – A portion of live user traffic is directed to different
deployment slots and then the app data is analyzed using App Insights or
any other tools
 Supported in Standard or Premium tier
 Testing requires cookies to be enabled in user’s browser
 Supports advanced TiP scenarios through Powershell cmdlets

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