Varnish Summit 2016

1. Handelsbanken
Securing our digital presence with Varnish
Fredric Berglund – System responsible / Solution Architect

2. Background
• New CMS
• Outdated Websites with old technique
• First Proof-of-concept
• Setup of Infrastructure
• Small public website – Best practice from vendor
• Solutions for secure online self services
• Self service for Corporate banking
• Self service for Private customers

3. Business
modul
Application
modul
Content
Menu
Area disposition done by CMS

4. Challenges
• Constant fast changes on all services – Content driven
• Old process of securing changes by code deploy
• Speed – Fast website
• High availability 365/24/7
• Media – reputation of the bank in media

5. Technique – How do we use Varnish
• 2 redundant Varnish servers – each having own cache
• Virtual machines minimal size
• 2 application servers – Resource services fetching content
• Routing rules depending on service
• Cache TTL depending on content types
• GRACE MODE!!!!
• Segmentation of user groups

6. Performance
• Corporate/Private same infrastructure
• Public site serving all countries and languages
• Some figures…

7. Performance
• Self service - 37 200 000 requests per day (High)
• Varnish caches 93,5% of total requests
• Removing one of our info types with short TTL we cover 99,3%

8. Next step
• New public site for Sweden
• New markets and languages (public site)
• Content to our mobile app
• Micro sites

9. Questions?