Deploying On EC2
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This document summarizes Steve Loughran's research into deploying applications across distributed cloud resources like Amazon EC2 and S3. It discusses moving from single server installations to server farms and cloud computing. Key benefits include scaling easily without large capital costs, but challenges include lack of persistent storage, dynamic IP addresses, and single points of failure. The document provides examples of using EC2 and S3 programmatically through the SmartFrog framework.
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Deploying On EC2
- 1. Steve Loughran HP Laboratories, Bristol, UK April 2008 Deploying on EC2
- 2. Researcher at HP Laboratories Area of interest: Deployment Author of Ant in Action Steve Loughran
- 3. How to host big applications across distributed resources Automatically Repeatably Dynamically Correctly Securely How to manage them from installation to removal How to make dynamically allocated servers useful Our research - see smartfrog.org
- 4. Who had breakfast this morning? Question
- 5. Who harvested wheat or corn, or killed an animal for that breakfast? Question
- 6. Farms provide food. It is somebody else's problem
- 7. Old world installation: single server Single web server, Single DB RAID filestore -SPOF -limitations of scale
- 8. yesterday: clustering Multiple web servers, Replicated DB RAID Network filestore Load-balancing router -Cost -Complexity -Limitations of scale Maintains the illusion of a single server
- 9. Now: server farms + Agile Infrastructure 500+ servers Distributed filestore Rented storage & CPU Scales up No capital outlay http://www.linuxjournal.com/
- 10. Assumptions that are now invalid System failure is an unusual event 100% availability can be achieved Data is always near the server You need physical access to the servers Databases are the best form of storage You need millions of $/£/€ to play
- 11. Who has the servers? Yahoo!, Google, MSN, Amazon, eBay: services MMORPG Game Vendors: World of Warcraft, Second Life EU Grid: Scientists HP, IBM, Sun: rent to companies (some resold) -focus on CPU performance for enterprise Amazon: rent to anyone with an Amazon account -focus on startups
- 12. Amazon S3 Multiple geo-located data storage No limits on size Cost of write is high (guarantee of written remotely) Read is cheap; may be out of date Cost: Low S3 is a global file system at a low price
- 13. Amazon S3 Charges S3 sets the limit on costs for reliable data storage over the network For Amazon, indexing and writes are the big costs…small files are the enemy Storage $0.15/GB/month Upload $0.10 per GB - all data transfer in Download $0.18 per GB - first 10 TB / month data transfer out $0.16 per GB - next 40 TB / month data transfer out $0.13 per GB - data transfer out / month over 50 TB Requests $0.01 per 1,000 PUT or LIST $0.01 per 10,000 GET or HEAD $0 DELETE
- 14. SmartFrog S3 Components Restlet API (restlet.org) HTTP operations Has Amazon AWS authentication support TransientS3Bucket extends S3Bucket { startActions [PUT_ACTION]; livenessActions [HEAD_ACTION]; terminateActions [S3_DELETE_ACTION]; } PersistentS3Bucket extends TransientS3Bucket { terminateActions []; }
- 15. Amazon EC2 Pay as you go Virtual Machine Hosting No persistent storage other than S3 filestore -uses HTTP GET/PUT/DELETE operations $0.10 per CPU/hour Resold OS images for more (RedHat) In 2008: static IP, failover/balancing In 2008: RAID-like storage
- 16. Amazon EC2 Host S3 Storage AMI (Xen VM) AMI (Xen VM) /mnt Host AMI (Xen VM) AMI (Xen VM) Public Internet /mnt /mnt /mnt Fast (free) network free access; slow initial read time pay per GET; per megabyte $ $ $ $ $
- 17. Demo
- 18. SmartFrog EC2 Components service extends ImageInstance { id "0X03DS92MX8K2A29P082"; imageID "ami-26b6534f"; key "EmlMg61YbNoThisIsNotMyKey"; minCount 10; maxCount 100; }; List available images Instantiate any number of images List deployed instances Terminate deployed instances Currently built on Typica
- 19. EC2 Limitations Can't talk to peers using public IP addresses No persistent file system other than S3 Most addresses are dynamic No managed redundancy/restart No multicast IP No movement of VMs off high-traffic racks Expensive to create/destroy per test case
- 20. EC2 and Apache Great platform for 'ready to use' machines Good for interop testing Need to automate machine update Need to improve the EC2 tooling Need to convince Amazon to give us lower cost S3/EC2 with lower QoS Hadoop, Tomcat, Geronimo…
- 21. Problems for us farmers Power management Predictive disk failure management Load balancing for availability, power File management Billing Routing Security/isolation Managing machine images Diagnostics Evolution of datacentre hardware
- 22. Feb 2008 Amazon Outage S3 and AWS suddenly started failing Intermittent, system wide, not visible to all Root cause: authentication service overloaded A Single Point of Failure will always find you <?xml version="1.0" encoding="UTF-8"?> <Error><Code>InternalError</Code> <Message>We encountered an internal error. Please try again.</Message> <RequestId>A2A7E5395E27DFBB</RequestId> <HostId>f691zulHNsUqonsZkjhIL/sGsn6K</HostId> </Error>
Editor's Notes
- #2: 1/14/2004 this is a fast feather talk at apachecon 2008