Post on 08-May-2015
Orange's move to the cloud
Why and How...
6th June 2013
Orange's move to the cloud
Why?
Problem
Credit: nicholsoncartoons.com.au
• Can write software, but can't deliver it as no infrastructure available
Downtime
Options
1. Do nothing
2. Expand fixed infrastructure
3. Move to the cloud
Pre-cloud costs
• Costing around £90k per month
• £3m over 3 years
Option 2 - Expand infrastructure
• £1m upfront cost
• £3.5m over 3 years
Option 3 - Move to the cloud
• £100k upfront expense to reserve instances
• £1.8m over 3 years
Why cheaper?
• Pay as you go pricingo Ability to scale upwards in real time to meet peak demand
o Ability to scale downwards in real-time in quiet periods to save on costs
Which cloud?
• Rackspace slightly cheaper
• Rackspace has better SLAs
• AWS APIs, SDKs and documentation
• AWS products and features
• AWS has an EU data center
Other considerations
• Integrating cloud servers into internal EE
systems
• Limited control over hardware and low-level
configuration
• Very limited SLAs from AWS
• Security concerns, Privacy concerns
• Resource contention / noisy neighbours
Technical design
• Anti-Fragile (rather than robust)
• Multiple data centers
• Multiple environments
• Driven by configuration (no manual changes)
• Automation
• Central Control
Orange's move to the cloud
How?
AWS Technologies
• EC2• S3• CloudFormation• CloudWatch• SES• Route 53• IAM• RDS
• CloudFront
• VPC
• ElastiCache
• Redshift
• Direct Connect
• CloudSearch
• Elastic Transcoder
• Elastic Beanstalk
• OpsWorks
• SNS
Configuration Management
• Puppet
• Chef
• Salt Stack
• OpsWorks
Databases
• Multi-AZ
• Multi-Master
• Distributed Writes
Testing
Tips
• Horizontal scalability
• Design for testing
• Prioritise Non-functionals
• Clusters require odd instance numbers
• Implement IAM security policies
• Lack of performance costs money
Technical / Business Benefits
• Faster time to market
• Greater system flexibility
• Rapid prototyping
• New business opportunities
Orange's move to the cloud
Questions?