Microservices Without Servers

Servers are killing your productivity. Rather than building better software for your users, you end up constantly distracted by maintaining computers. Wasn't the "cloud" supposed to fix this? It sounded so promising until we realised it was just renting VMs in someone else's datacenter. We couldn't escape "servers". Until now... In this session, developers will learn how to build microservices without servers, using modern “serverless” cloud platforms. We’ll look at common challenges (and solutions) to building applications using “serverless” stacks. Exploring emerging “serverless” design patterns will give developers the knowledge to build application architectures using these new platforms. This session is aimed at software developers experienced in building traditional backend web applications, who want to learn how to build microservices without servers.

Transcript

1. MICROSERVICES WITHOUT SERVERS JAMES THOMAS, IBM
2. SERVERS ARE KILLING YOUR PRODUCTIVITY
3. IDEA PROFIT?
4. HARD DRIVE FAILS
5. HARD DRIVE FAILS LINUX OS VULNERABILTY
6. HARD DRIVE FAILS LINUX OS VULNERABILTY MIDDLEWARE VERSION UPDATE
7. HARD DRIVE FAILS LINUX OS VULNERABILTY MIDDLEWARE VERSION UPDATE UPGRADE NETWORK INFRASTRUCTURE
8. HARD DRIVE FAILS LINUX OS VULNERABILTY MIDDLEWARE VERSION UPDATE UPGRADE NETWORK INFRASTRUCTURE MORE MEMORY AND BIGGER CPU
9. HARD DRIVE FAILS LINUX OS VULNERABILTY MIDDLEWARE VERSION UPDATE UPGRADE NETWORK INFRASTRUCTURE MORE MEMORY AND BIGGER CPU DB TABLE INDEX GETS CORRUPTED
10. HARD DRIVE FAILS LINUX OS VULNERABILTY MIDDLEWARE VERSION UPDATE UPGRADE NETWORK INFRASTRUCTURE MORE MEMORY AND BIGGER CPU DB TABLE INDEX GETS CORRUPTED GET ANOTHER SERVER…
11. WASN’T THE CLOUD SUPPOSED TO FIX THIS?
12. “COMPUTING AS A UTILITY” Source: https://flic.kr/p/5aHJFh
13. POWER SUB-STATION? Source: http://i22.photobucket.com/albums/b344/GlassCurtain/Substation.jpg
14. NO ESCAPE… Source: http://bit.ly/1ozGfzK
15. average utilisation 
 20% - 40% of capacity
16. WHAT CAN WE DO?
17. AWS LAMBDA
18. “RUNS CODE IN RESPONSE TO EVENTS, MANAGES COMPUTE RESOURES” …WHY IS THIS DIFFERENT?
19. FUNCTIONS-AS-A-SERVICE
20. SCALING: 0 to N
21. PAY-AS-YOU-GO flickr photo by a loves dc https://flickr.com/photos/alovesdc/3466740007 CC (BY) license
22. “ONE HAPPY LAMBDA CUSTOMER SAVING 80% OFF THEIR CLOUD BILLS” Source: http://uk.businessinsider.com/amazon-web-services-lambda-explained-2015-11
23. ISN’T THIS JUST PLATFORM-AS-A-SERVICE?
24. Source: https://twitter.com/adrianco/status/736553530689998848
27. PROVIDERS
28. Source: http://cloudacademy.com/blog/serverlessconf-recap-serverless/
29. SPOILER: THERE’S STILL SERVERS flickr photo by BobMical https://flickr.com/photos/small_realm/11189803153 CC (BY-NC) license
30. ENOUGH TALKING…
 BRING ON THE CODE.
31. WEATHERBOT Source: http://uk.reuters.com/article/us-life-selfies-idUKKCN0R305L20150903
33. IBM OPENWHISK
34. OPEN SOURCE
35. $ git clone https://github.com/ openwhisk/openwhisk.git $ cd openwhisk/tools/vagrant $ vagrant up
37. RUNTIMES
38. endpoint.pathname = path.resolve(endpoint.pathname, url_path) return url.format(endpoint) } namespace (options) { if (options && options.hasOwnProperty('namespace')) { return options.namespace } else if (this.options.hasOwnProperty('namespace')) { return this.options.namespace } throw new Error(messages.MISSING_NAMESPACE_ERROR) } qs (options, names) { return names.filter(name => options.hasOwnProperty(name)) .reduce((previous, name) => { previous[name] = options[name] return previous }, {}) my_service.js
39. function main(params) { // put your code here! 
 
 return {…}; } Entry Point Event Parameters Service Result my_service.js
40. import com.google.gson.JsonObject; public class Hello { public static JsonObject main(JsonObject args) { JsonObject response = new JsonObject(); return response; } } Entry Point Event Parameters Service Result my_service.java
41. ACTIONS
44. TRIGGERS
46. CHALLENGES
47. COMPUTE LIMITS flickr photo by zund https://flickr.com/photos/zund/12202485675 CC (BY-NC-ND) license
49. MONITORING, DEBUGGING AND TESTING flickr photo by Thomas Hawk https://flickr.com/photos/thomashawk/4544013443 CC (BY-NC) license
50. COMPLEXITY flickr photo by Bitterjug https://flickr.com/photos/bitterjug/7670055210 CC (BY) license
51. FRAMEWORKS
52. SERVERS ARE KILLING YOUR PRODUCTIVITY
53. Source: http://gunshowcomic.com/648
54. Source: https://twitter.com/patrickdebois/status/734459440603275264
55. BURN YOUR SERVERS + = UPGRADE PRODUCTIVITY
56. https://github.com/openwhisk https://dwopen.slack.com 
 #openwhisk http://stackoverflow.com/questions/ tagged/openwhisk @thomasj or @openwhisk