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Replace Your Iron With a Cloud

Clouds are like cotton candy, and irons … make shirts flat?. Replace Your Iron With a Cloud. Barney Boisvert http://www.barneyb.com/. Who Am I?. Agenda. What is “the cloud”? Different approaches of cloud services Pros and cons of using the cloud AWS components

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Replace Your Iron With a Cloud

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  1. Clouds are like cotton candy, and irons … make shirts flat? Replace Your Iron With a Cloud Barney Boisvert http://www.barneyb.com/

  2. Who Am I?

  3. Agenda • What is “the cloud”? • Different approaches of cloud services • Pros and cons of using the cloud • AWS components • How Mentor migrated to the cloud • The AWS us-east-1 outage of April 20th

  4. What is “The Cloud”? • Cloud is a class of services, not technologies • Non-hardware resources • Compute • Storage • Scaling • Cloud != virtualization

  5. Approaches to Cloud Services • Amazon Web Services (AWS) • Cloudy hardware-ish resources • Good for migration • Google App Engine (GAE) • Pure cloud resources • Bad for migration • Heroku • GAE-style services atop AWS

  6. Pros and Cons The Good The Bad No custom hardware Requires new skills IT-free Net/Info Sec • Horizontal scaling • No initial investment ($$) • IT-free • Playtime!

  7. Major Issues • Backups • Appliances • Sending email • No private internal network • No balancing on IP addresses

  8. Migrating to AWS • Hardware-ish resources • Minimal code impact • Easier migration path • Allows gradual expansion

  9. AWS Organization • AWS • 5 Regions • 2-4 Availability Zones per region

  10. AWS Components • EC2 – Elastic Compute Cloud • ELB – Elastic Load Balancer • EBS – Elastic Block Store • S3 – Simple Storage Service

  11. AWS Components • EC2 • ELB • EBS • S3 • Route 53 • Elastic Beanstalk • AutoScaling • SES • RDS • SimpleDB

  12. How We Migrated: Code • Moved MS SQL -> MySQL • Moved Windows -> Windows/Linux • Upgraded ColdFusion 8 -> 9 • Scripts for stock AMIs

  13. How We Migrated: Infrastructure • Expanded DB cluster to include AWS • Expanded App cluster to include AWS • Contracted App cluster to exclude RS • Moved DNS from RS load balancer to ELB • Contracted DB cluster to exclude RS

  14. How We Migrated: Aftermath • I/O constraints • Build parallel cluster, tested, and switched over • Background processing • Launched another app server • no user traffic / all background tasks

  15. The April 20th Outage • One AZ’s EBS freaked • No launching EBS-rooted instances in any AZ • No new volumes in any AZ • We lost ~40% of our instances • manually repointed DNS for our GSA cluster • No other user-facing failure • Multi-AZ is simply required. Period.

  16. Cloud-Based Software Evals • User requests eval • Spin up evaluation environment • RDP and run through tests • Tear down • Retain tests for later “reanimation”

  17. Soapbox* • If you're not using version control, start. Before you write another line of code. • If you don't use a Front Controller framework, start. (I like FB3Lite, but then I wrote it) • Learn about your tools. They're all far more powerful than you believe. * I’m going to read this one verbatim. Sorry.

  18. Contact bboisvert@gmail.com http://www.barneyb.com/ @barneyb

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