Presentation walking through how you can run Python Flask web applications on Azure App Service.

1. Running Flask apps on
Azure App Service
simon.waight@microsoft.com
@simonwaight
blog.siliconvalve.com

2. Quickly build, deploy and scale applications
without worrying about infrastructure
Azure App Service
High productivity
Python, Node, Java, .NET
Docker, PHP, Ruby
Staging &
deployment
Testing in
production
App gallery
marketplace
Fully managed
Auto scale &
load balancing
High availability
w/ auto patching
Reduced
operations costs
Backup &
recovery
Enterprise grade
Global data
center footprint
Hybrid
support
Azure AD
integration
Secure &
compliant

3. App
Service
High
productivity
Your choice of languages,
pre-built packages, and tools
Develop
A
Build
</>
Deploy
Monitor

4. High
productivity
Your choice of languages,
pre-built packages, and tools
Develop
IDE
tools
Language
Pre-built
packages
.NET

5. High
productivity
Your choice of languages,
pre-built packages, and tools
Build
z
z
Source
code
CI
engines
Container
registry

6. Web
ARM
Docker
k8s
Docker
Compose
Zip
war
High
productivity
Your choice of languages,
pre-built packages, and tools
Deploy
z
Slots
CD
tools
Deploy
packages

7. High
productivity
Your choice of languages,
pre-built packages, and tools
Monitor
Monitoring
Tools
Debug
tools

8. P R O V I S I O N I N G A P Y T H O N W E B A P P H O S T

9. Demo Time

10. Understanding App Service CI / CD
• Kudu and Oryx are the two App Service engines controlling CI and CD
• Kudu does a web-hook triggered pull from source control and performs
local compile and deployment
• Kudu recognises Python apps based on *.py, requirements.txt
or runtime.txt
• Kudu automatically:
• Activates a virtual environment
• Uses PIP to restore modules in requirements.txt.
• Configure via Azure Portal easiest, but also possible via CLI
• Both Kudu and Oryx are open source and available on GitHub.

11. Python features on App Service
• The Python runtime is deployed from a baseline Docker image
• Docker image:
• Uses Gunicorn WSGI HTTP Server
• Includes Flask web framework. Run Django (or other) frameworks by using
requirements.txt for installation
• Is built using a Dockerfile published on GitHub
• App Settings can be accessed as environment variables using os.eviron
• Troubleshoot runtime issues via web SSH and streaming logs
• Utilise Managed Service Identities (MSI) to access other Azure resources.

12. Running Flask apps on
Azure App Service
simon.waight@microsoft.com
@simonwaight
blog.siliconvalve.com
https://wp.me/p26dla-T6