The document discusses a conference focused on multitenant web applications using ASP.NET Core, led by expert Gunnar Peipman. It outlines key concepts of multitenancy, including shared, hybrid, and dedicated hosting models, as well as important components such as tenant definitions and middleware. Resources and support materials related to the presentation are provided through links and personal blog mentions.

1. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
Multitenant web applications with
ASP.NET Core
Gunnar Peipman
ASP.NET/IIS MVP
gunnarpeipman.com

2. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
Many thanks to our sponsors & partners!
GOLD
SILVER
PARTNERS
PLATINUM
POWERED BY

3. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• What is multitenancy?
• Hosting models
• Concepts
• Demos
• Q&A
Agenda

4. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Presentation page: bit.ly/aspnetcoremultitenant
• Source code: bit.ly/aspnetcoremultitenantsrc
• My blog: gunnarpeipman.com
Support materials

5. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
WHAT IS MULTITENANCY?

6. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
The term "software multitenancy" refers to a software architecture in
which a single instance of software runs on a server and serves multiple
tenants.
A tenant is a group of users who share a common access with specific
privileges to the software instance.
With a multitenant architecture, a software application is designed to
provide every tenant a dedicated share of the instance - including its
data, configuration, user management, tenant individual functionality
and non-functional properties.
„Multitenancy“, Wikipedia
What is multitenancy?

7. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
HOSTING MODELS

8. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
All resources are shared between tenants
Shared model
Tenant 1 Tenant 2
App
hosting
Storage
Tenant 3 Tenant 4
App
hosting
Storage

9. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
Some resources are shared between tenants
Hybrid model
Tenant 1 Tenant 2
App
hosting
StorageStorage
SQL
database
CDN Cache

10. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
No shared resources
Dedicated model
App
hosting
Storage
Data
Tenant 1
App
hosting
Storage
Data
Tenant 2

11. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Customer provided environment
• Multi-instance, not multitenant hosting
• Usually special case
On-premises

12. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
CONCEPTS

13. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Tenant definition
• Tenant provider
• Missing tenant middleware
• Multitenant DbContext
Concepts

14. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Data structure that defines tenant technically
• Used by multitenant application
• Provided to application externally
Tenant definition

15. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Detects current tenant
• Provides other parts of
application with tenant
information
• Multiple
implementations
Tenant provider
ITenantProvider
DbTenantProvider FileTenantProvider
BlobTenantProvider HttpTenantProvider

16. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Request middleware
• Handles missing tenants
• Usually redirects to some page
• Don’t throw nasty errors
Missing tenant middleware

17. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Provides correct cache key for model caching
• Defensive CRUD operations
• Checks for cross-tenant operations
• Database provider agnostic
Multitenant DbContext

18. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
DEMO

19. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
• Presentation page: bit.ly/aspnetcoremultitenant
• Source code: bit.ly/aspnetcoremultitenantsrc
• My blog: gunnarpeipman.com
Support materials

20. @ITCAMPRO #ITCAMP18Community Conference for IT Professionals
Q & A