Agenda entry: The CentraStage experience, Ian van Reenen, CTO CentraStage: With 200,000 distributed agents with persistent SSL connections, keeping them all alive in the cloud can be a challenge. In this talk Ian will share the learnings of CentraStage regarding ELB vs HAProxy, and give insight into their strategies to cater for connection avalanches after outages. Organiser's comment: Our first double-act as Ian from CentraStage brought up his DevOps lead, Jason, for a strong discussion-led session about how CentraStage have worked with ELB and HAProxy. This was a great talk with some really engaging Q&A, thanks guys for bringing us an interesting topic.

1. Remote Management
and Monitoring

3.  Hosted solution
 REALLY easy to join and
deploy
 PAYG billing with no
minimum contracts
 Scale on demand with no
lead times
 Available everywhere
 Cheaper than the rest
 (but not nasty)

7. • Route53 with weighted round robin
• Elastic Load Balancers and HAproxy
• EC2 with autoscaling
• Elasticache cluster
• RDS with multizone replication failover
• S3 for file storage and distribution
• CloudWatch for metrics and monitoring
• Consolidated Billing for Development, Staging and
Production accounts
• Reservations

11. • ELB v HAProxy + NGINX
• Tools for DevOps
• New Relic
• Ylastic
• PagerDuty
• PaperTrail
• Atlassian Stack
• Outages and Avalanches
• What can cause them
• Consequences
• Resolutions

12. ian.vanreenen@centrastage.com