8 ½ things about Serverless - FrontTalks

FrontTalks 2017, Yekaterinsburg, Rusia

https://events.yandex.ru/events/fronttalks/2017/

Transcript

1. THINGS ABOUT SERVERLESS WITH NODE.JS
2. #FrontTalks @slobodan_ CTO AT CLOUD HORIZON AND JS BELGRADE MEETUP ORGANIZER github.com/stojanovic twitter.com/slobodan_ SLOBODAN STOJANOVIĆ
3. #FrontTalks @slobodan_ ANOTHER SERVERLESS TALK?
4. #FrontTalks @slobodan_ SOME OF THE QUESTIONS I WILL TRY TO ANSWER TODAY
5. #FrontTalks @slobodan_ • WHAT IS SERVERLESS? • IS SERVERLESS ONLY ABOUT THE FUNCTIONS • HOW DOES IT WORK? • WHAT ARE THE SERVERLESS PLATFORMS? • HOW DOES IT WORK WITH NODE.JS? • HOW TO DEBUG SERVERLESS FUNCTION? • WHEN SHOULD YOU USE IT?
6. #FrontTalks @slobodan_
7. #FrontTalks @slobodan_ 1. WHAT IS
 SERVERLESS?
8. #FrontTalks @slobodan_ PLATFORM-AS-A-SERVICE (PaaS)
9. #FrontTalks @slobodan_ FUNCTION-AS-A-SERVICE (FaaS)
10. #FrontTalks @slobodan_
11. LET’S TRY TO EXPLAIN IT WITH SOMETHING AS SIMPLE AS LEGO BRICKS
12. #FrontTalks @slobodan_
13. #FrontTalks @slobodan_ Imagine Lego 4x4 white piece is a server
14. #FrontTalks @slobodan_ Building and deploying
 monolith app
15. #FrontTalks @slobodan_ Building and deploying
 monolith app
16. #FrontTalks @slobodan_ Building and deploying
 monolith app
17. #FrontTalks @slobodan_ Then people start using it and you need to scale
18. #FrontTalks @slobodan_ Then people start using it and you need to scale
19. #FrontTalks @slobodan_ Then people start using it and you need to scale
20. #FrontTalks @slobodan_ You need to scale everything, but only green and blue parts are really used
21. #FrontTalks @slobodan_ If one part of the app fails whole system will fail
22. #FrontTalks @slobodan_ If one part of the app fails whole system will fail
23. #FrontTalks @slobodan_ If one part of the app fails whole system will fail
24. #FrontTalks @slobodan_ MICROSERVICES TO THE RESCUE
25. #FrontTalks @slobodan_ Hello, from your server, again! Now it can be in the cloud, it doesn’t matter
26. #FrontTalks @slobodan_ Now each service should be independent, right?
27. #FrontTalks @slobodan_ Now each service should be independent, right?
28. #FrontTalks @slobodan_ Scaling is easy
29. #FrontTalks @slobodan_ Scaling is easy
30. #FrontTalks @slobodan_ And if no one is using some service it’s simple to remove or replace it
31. #FrontTalks @slobodan_ And if no one is using some service it’s simple to remove or replace it
32. #FrontTalks @slobodan_ And if some service fails, it doesn’t affect the system
33. #FrontTalks @slobodan_ And if some service fails, it doesn’t affect the system
34. #FrontTalks @slobodan_ And if some service fails, it doesn’t affect the system
35. #FrontTalks @slobodan_ But what if we didn’t scale it before it fails?
36. #FrontTalks @slobodan_ ALSO, ARE SERVERS THAT CHEAP?
37. #FrontTalks @slobodan_ How do we make microservices cheaper?
38. #FrontTalks @slobodan_ By bundling them together
39. #FrontTalks @slobodan_ By bundling them together
40. #FrontTalks @slobodan_ By bundling them together
41. #FrontTalks @slobodan_ By bundling them together
42. #FrontTalks @slobodan_ But what if this one fails?
43. #FrontTalks @slobodan_ IMAGINE WE DON’T NEED 4X4 PIECE ANYMORE?
44. #FrontTalks @slobodan_ Imagine our microservices without 4x4 white pieces!
45. #FrontTalks @slobodan_ Than scaling is simply adding more services
46. #FrontTalks @slobodan_ Than scaling is simply adding more services
47. #FrontTalks @slobodan_ And, if we don’t need some service…
48. #FrontTalks @slobodan_ And, if we don’t need some service…
49. #FrontTalks @slobodan_ NOW IMAGINE THAT SCALING IS DONE AUTOMATICALLY
50. #FrontTalks @slobodan_ If something fails it’s replaced automatically
51. #FrontTalks @slobodan_ ALSO IMAGINE THAT YOU PAY ONLY FOR THE PARTS THAT YOU ARE USING AT THE MOMENT
52. #FrontTalks @slobodan_
53. #FrontTalks @slobodan_ WELL, WE CALL THAT THING SERVERLESS!
54. #FrontTalks @slobodan_
55. 2. IS SERVERLESS ONLY ABOUT THE FUNCTIONS?
56. #FrontTalks @slobodan_ NO
57. #FrontTalks @slobodan_ НЕТ
58. #FrontTalks @slobodan_ SERVERLESS IS A TECHNOLOGY THAT COST YOU NOTHING IF NO-ONE IS USING IT
59. #FrontTalks @slobodan_ FUNCTIONS ARE JUST A SUBSET OF SERVERLESS
60. #FrontTalks @slobodan_
61. #FrontTalks @slobodan_ THIS TALK WILL FOCUS ON SERVERLESS FUNCTIONS
62. 3. HOW DOES IT WORK?
63. #FrontTalks @slobodan_ EVENT-DRIVEN
64. #FrontTalks @slobodan_
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69. #FrontTalks @slobodan_
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73. #FrontTalks @slobodan_
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75. #FrontTalks @slobodan_ “LIGHTBULB” == FUNCTION
76. #FrontTalks @slobodan_ STATELESS
77. #FrontTalks @slobodan_ SERVERLESS IS LIKE A GOLDEN FISH
78. #FrontTalks @slobodan_ BUT WHAT ABOUT REAL SYSTEMS?
79. #FrontTalks @slobodan_
80. #FrontTalks @slobodan_
81. #FrontTalks @slobodan_ SERVERLESS APP
82. #FrontTalks @slobodan_
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85. #FrontTalks @slobodan_ IT’S LIKE A BLACK BOX
86. #FrontTalks @slobodan_ IT’S LIKE A BLACK BOX BUT HOW DOES THAT BLACK BOX WORK?
87. #FrontTalks @slobodan_ exports.handler = (event, context, cb) => { cb(null, { “Hello”: ”World” }) }
88. #FrontTalks @slobodan_ JSON event { “body”:”…”, “headers”: “”, … } exports.handler = (event, context, cb) => { cb(null, { “Hello”: ”World” }) }
89. #FrontTalks @slobodan_ JSON { “body”: { “Hello”:”World” }, “status”: 200, … } exports.handler = (event, context, cb) => { cb(null, { “Hello”: ”World” }) }
90. #FrontTalks @slobodan_
91. 4. WHAT ARE THE MOST IMPORTANT SERVERLESS PLATFORMS TODAY?
92. #FrontTalks @slobodan_
93. #FrontTalks @slobodan_
94. #FrontTalks @slobodan_
95. #FrontTalks @slobodan_ AWS LAMBDA
96. #FrontTalks @slobodan_ • $0.20 PER 1 MILLION REQUESTS • FIRST MILLION REQUESTS / MONTH ARE FREE • $0.00001667 FOR EVERT GB-SECOND • FIRST 400.000 GB-SECONDS / MONTH ARE FREE
97. #FrontTalks @slobodan_ • TIMEOUT UP TO 300 SECONDS • 128MB TO 1.5GB OF MEMORY • 500MB OF NON-PERSISTENT STORAGE (/TMP) • DEFAULT CONCURRENT EXECUTION LIMIT: 1000
98. #FrontTalks @slobodan_ WHAT PROGRAMMING LANGUAGE YOU NEED TO USE FOR SERVERLESS?
99. #FrontTalks @slobodan_ • NODE.JS • PYTHON • JAVA • C# • SHELL SCRIPTS • ANY EXECUTABLE AWS LAMBDA
100. #FrontTalks @slobodan_ • NODE.JS • C# • F# • PYHON • PHP • SHELL SCRIPTS • ANY EXECUTABLE AZURE FUNCTIONS
101. #FrontTalks @slobodan_ GOOGLE CODE FUNCTIONS JUST NODE.JS AT THE MOMENT
102. #FrontTalks @slobodan_
103. 5. HOW DOES IT WORK WITH NODE.JS?
104. #FrontTalks @slobodan_
105. #FrontTalks @slobodan_ • GOOD STARTUP PERFORMANCE • SMALL MODULES • PERFORMANCE WITH LOW CPU AND MEMORY • SINGLE THREAD • EASY TO LEARN PROS
106. #FrontTalks @slobodan_ • ASYNC • MADE FOR SCALABILITY • NODE_MODULES SIZE • EASY TO FUCKUP CONS
107. #FrontTalks @slobodan_ ‘use strict’ console.log(‘Loading event’) exports.handler = (event, context, callback) => { console.log(‘“Hello”: ”World”’) callback(null, {“Hello”: ”World”}) } hello-world.js
108. #FrontTalks @slobodan_ ‘use strict’ console.log(‘Loading event’) exports.handler = (event, context, callback) => { console.log(‘“Hello”: ”World”’) callback(null, {“Hello”: ”World”}) } hello-world.js
109. #FrontTalks @slobodan_ • CREATE LAMBDA FUNCTION • UPLOAD ZIP FILE • CREATE API GATEWAY • SET TRIGGER • SET PERMISSIONS • ~11 MINS READ: http://amzn.to/2kciIEt HOW TO DEPLOY IT TO AWS
110. #FrontTalks @slobodan_ IT’S LIKE FLYING FROM YEKATERINBURG TO HAWAII WITH LOW-COST DESTINATION IS AWESOME, BUT IT TAKES SOME TIME AND IT’S NOT THAT PLEASANT
111. #FrontTalks @slobodan_ • SERVERLESS FRAMEWORK • CLAUDIA.JS • AMAZON SAM • APEX FRAMEWORKS / LIBRARIES
112. #FrontTalks @slobodan_ CLAUDIAJS.COM > 107.000 DOWNLOADS
113. #FrontTalks @slobodan_ CLAUDIA VS NATIVE UPLOAD === PRIVATE JET VS LOW-COST WITH A FEW LAYOVERS
114. #FrontTalks @slobodan_
115. #FrontTalks @slobodan_ • DEPLOY AND UPDATE WITH SINGLE COMMAND • USE STANDARD NPM MODULES • NO BOILERPLATE, JUST FOCUS ON YOUR WORK • MANAGE MULTIPLE VERSIONS EASILY • GET STARTED QUICKLY, FLAT LEARNING CURVE MAIN CHARACTERISTICS
116. #FrontTalks @slobodan_ FLAT LEARNING CURVE HOW FAST CAN WE START?
117. #FrontTalks @slobodan_
118. #FrontTalks @slobodan_ • npm i claudia -g • SET UP AWS CREDENTIALS (ONE TIME) • mkdir claudia-api && cd $_ • npm init -f • npm i claudia-api-builder -S prepare
119. #FrontTalks @slobodan_ ‘use strict’ const Api = require(‘claudia-api-builder‘) const api = new Api() const facts = require(‘./fun-facts.json’) api.get(‘/‘, () => facts) module.exports = api api.js
120. #FrontTalks @slobodan_ claudia create \ --region eu-central-1 \ --api-module api DEPLOY
121. #FrontTalks @slobodan_ { "lambda": { "role": "js-fun-executor", "name": "js-fun", "region": "eu-central-1" }, "api": { "id": "45qngjvkye", "module": "api", "url": "https://45qngjvkye.execute-api.eu- central-1.amazonaws.com/latest" } } RESULT
122. #FrontTalks @slobodan_ bit.ly/js-fun-api
123. #FrontTalks @slobodan_ bit.ly/js-fun-api
124. #FrontTalks @slobodan_ ‘use strict’ const Api = require(‘claudia-api-builder‘) const api = new Api() const facts = require(‘./fun-facts.json’) api.get(‘/‘, () => facts) api.get(‘/{id}’, req => facts.filter(fact => fact.id === req.pathParams.id )) api.get(‘/random‘, () => facts[ Math.floor(Math.random() * facts.length) ]) module.exports = api api.js
125. #FrontTalks @slobodan_ ‘use strict’ const Api = require(‘claudia-api-builder‘) const api = new Api() const facts = require(‘./fun-facts.json’) api.get(‘/‘, () => facts) api.get(‘/{id}’, req => facts.filter(fact => fact.id === req.pathParams.id )) api.get(‘/random‘, () => facts[ Math.floor(Math.random() * facts.length) ]) module.exports = api api.js
126. #FrontTalks @slobodan_ claudia update UPDATE
127. #FrontTalks @slobodan_ /random bit.ly/js-fun-api
128. #FrontTalks @slobodan_ /8 bit.ly/js-fun-api
129. #FrontTalks @slobodan_
130. 6. HOW TO DEBUG SERVERLESS FUNCTION
131. #FrontTalks @slobodan_ WHERE CAN YOU SEE
 CONSOLE.LOG?
132. #FrontTalks @slobodan_ CLOUD WATCH
133. #FrontTalks @slobodan_ MONITORING SERVICE FOR AWS CLOUD RESOURCES AND THE APPS YOU RUN ON AWS
134. #FrontTalks @slobodan_ YOU CAN USE IT VIA WEB CONSOLE, AWS CLI, ETC.
135. #FrontTalks @slobodan_ api.get(‘/{id}’, req => { const filtered = facts.filter(fact => fact.id === req.pathParams.id ) console.log(‘Here >>’, filtered) return filtered }) api.js
136. #FrontTalks @slobodan_ aws logs filter-log-events \ --filter='Log this' \ --log-group-name=/aws/lambda/js-fun \ --query='events[0].message' \ --output=text LIST LOG COMMAND
137. #FrontTalks @slobodan_ 2017-09-16T07:25:12.652Z 2d4ea5c2-9ab0-11e7-96c6-7d019d1c743c Log this [] OUTPUT
138. #FrontTalks @slobodan_ DEBUGGING IS NOT FUN. HOW CAN WE DO LESS DEBUGGING?
139. #FrontTalks @slobodan_ BY WRITING TESTS
140. #FrontTalks @slobodan_ BUT HOW DO YOU TEST SERVERLESS FUNCTIONS?
141. #FrontTalks @slobodan_ AS ANY OTHER NODE.JS LIBRARY !
142. #FrontTalks @slobodan_ EXAMPLE? CLAUDIA-BOT-BUILDER SPECS
143. #FrontTalks @slobodan_ AWS X RAY
144. #FrontTalks @slobodan_
145. #FrontTalks @slobodan_
146. #FrontTalks @slobodan_ EASIEST WAY TO LEARN SERVERLESS? GO AND PLAY WITH IT!
147. #FrontTalks @slobodan_ FUNNIEST WAY TO LEARN SERVERLESS? "
148. #FrontTalks @slobodan_ SERVERLESS.CAMP
149. #FrontTalks @slobodan_
150. 7. WHY IS IT IMPORTANT?
151. #FrontTalks @slobodan_ MINIMAL MAINTENANCE
152. #FrontTalks @slobodan_ FINANCIAL INCENTIVE https://gojko.net/2016/08/27/serverless.html
153. #FrontTalks @slobodan_ TRUE MICROSERVICES
154. #FrontTalks @slobodan_ AUTO SCALING AND FAILOVER
155. #FrontTalks @slobodan_ FOCUS ON BUSINESS LOGIC, NOT CONFIGURATION
156. #FrontTalks @slobodan_
157. 8. WHEN SHOULD I USE SERVERLESS?
158. #FrontTalks @slobodan_ LET’S START WITH WHEN YOU SHOULD NOT USE SERVERLESS?
159. #FrontTalks @slobodan_ • REAL-TIME APPS WITH WEB SOCKETS • LOW-LATENCY APPS • WHEN YOU NEED CUSTOM SERVER CONFIG • WHEN YOU NEED COMPLIANCE • LONG RUNNING TASKS • COMPEX COMPUTING • WHEN YOU NEED TO PROVIDE SLA
160. #FrontTalks @slobodan_ OK, BUT WHAT IS IT GOOD FOR?
161. #FrontTalks @slobodan_ • WEB APIs • BACKEND FOR THE SINGLE PAGE APP • CHATBOTS • QUICK PROTOTYPES THAT CAN EVOLVE TO 
 A REAL SOLUTIONS • PROCESSING FILES OR ANY KIND OF DATA • IoT • MICROSERVICES • MANY, MANY OTHER THINGS
162. 8 1/2. WAIT, WHAT ABOUT THE NAME?
163. #FrontTalks @slobodan_
164. #FrontTalks @slobodan_ LESS IS MORE
165. #FrontTalks @slobodan_ LESS IS MORE SERVER SERVERS
166. #FrontTalks @slobodan_ “SERVERLESS” IS JUST A NAME. WE COULD HAVE CALLED IT “JEFF” PAUL JOHNSTON
167. #FrontTalks @slobodan_ “IT IS SERVERLESS THE SAME WAY WIFI IS WIRELESS” GOJKO ADŽIĆ
168. #FrontTalks @slobodan_ SUMMARY
169. #FrontTalks @slobodan_ • SERVERLESS IS FULLY MANAGED FaaS THAT
 HELPS YOU TO FOCUS ON YOUR BUSINESS LOGIC • EVENT-DRIVEN - MANY THINGS CAN TRIGGER FUNCTION • AUTO SCALING AND AUTO FAILOVER • IT WORKS NICE WITH NODE.JS • 3 MAJOR NODE.JS FRAMEWORKS • IT’S TRICKY TO DEBUG, SO WRITE TESTS • GO AND TRY IT, IT’S EASY TO LEARN # SUMMARY
170. #FrontTalks @slobodan_ ALSO, SERVERS STILL EXIST BUT THEY ARE NOT YOUR PROBLEM
171. #FrontTalks @slobodan_ ALSO, SERVERS STILL EXIST BUT THEY ARE NOT YOUR PROBLEM
172. #FrontTalks @slobodan_
173. THAT'S IT.
 THANKS!
174. КОНЕЦ
175. QUESTIONS? @slobodan_ bit.ly/fronttalks-serverless #FrontTalks