8 1-2 things about serverless

Presentation from GeekNight #5

Transcript

1. THINGS ABOUT SERVERLESS WITH NODE.JS
2. I AM SLOBODAN STOJANOVIĆ CTO OF CLOUD HORIZON AND JS BELGRADE MEETUP ORGANIZER github.com/stojanovic twitter.com/slobodan_
3. SOME OF THE QUESTIONS I WILL TRY TO ANSWER TODAY
4. • WHAT IS SERVERLESS? • HOW DOES IT WORK? • WHY IS IT IMPORTANT? • MOST IMPORTANT SERVERLESS PLATFORMS? • PROGRAMMING LANGUAGES? • WHAT CAN TRIGGER SERVERLESS FUNCTION? • HOW DOES IT WORK WITH NODE.JS? • WHEN SHOULD I USE IT?
5. 1. WHAT IS
 SERVERLESS?
6. LET’S TRY TO EXPLAIN HOW IT WORKS USING LEGO BRICKS
7. Imagine Lego 4x4 white piece is a physical server
8. Building and deploying
 monolith app
9. Then people start using it and you need to scale
10. Then people start using it and you need to scale
11. You need to scale everything, but only green and blue parts are really used
12. MICROSERVICES TO THE RESCUE
13. Hello, from our physical server, again! Now it can be in the cloud, it doesn’t matter
14. Now each service should be independent, right?
15. Scaling is easy
16. And if no one is using some service it’s simple to remove or replace it
17. And if no one is using some service it’s simple to remove or replace it
18. ARE SERVERS THAT CHEAP?
19. How do we make microservices cheaper?
20. How do we make microservices cheaper?
21. By bundling them together
22. By bundling them together
23. By bundling them together
24. BETTER, RIGHT? BUT…
25. WHAT IF WE DON’T NEED 4x4 PIECE ANYMORE?
26. Imagine our microservices without 4x4 white pieces!
27. Imagine our microservices without 4x4 white pieces!
28. Than scaling is simply adding more services
29. Than scaling is simply adding more services
30. And, if we don’t need some service…
31. And, if we don’t need some service…
32. And, if we don’t need some service…
33. NOW IMAGINE THAT SCALING AND REMOVING ARE DONE AUTOMATICALLY
34. ALSO IMAGINE THAT YOU PAY ONLY FOR THE PARTS THAT YOU ARE USING AT THE MOMENT
35. WELL, THAT’S SERVERLESS!
36. Our 4x4 white piece still exists, but it’s not our problem anymore
37. SO SERVERLESS IS SIMPLY
 PLATFORM-AS-A-SERVICE
38. OR MORE RECENTLY FUNCTION-AS-A-SERVICE
40. 2. HOW DOES IT WORK?
41. EVENT-DRIVEN
45. 3. WHY IS IT IMPORTANT?
46. • MINIMAL MAINTENANCE • NO CONFIGURATION • REAL MICROSERVICES • AUTO SCALING • FINANCIAL INCENTIVES
47. https://gojko.net/2016/08/27/serverless.html
48. 4. WHAT ARE THE MOST IMPORTANT SERVERLESS PLATFORMS?
53. • TIMEOUT BETWEEN 1 AND 300 SECONDS • 128MB TO 1.5GB OF MEMORY • 500MB OF NON-PERSISTENT STORAGE (/TMP) • DEFAULT CONCURRENT EXECUTION LIMIT: 1000
54. • $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
55. LAMBDA @ EDGE
56. 5. WHAT PROGRAMMING LANGUAGES CAN I USE?
57. • NODE.JS • PYTHON • JAVA • C# • SHELL SCRIPTS • ANY EXECUTABLE AWS LAMBDA
58. • NODE.JS • C# • F# • PYHON • PHP • SHELL SCRIPTS • ANY EXECUTABLE AZURE FUNCTIONS
59. GOOGLE CODE FUNCTIONS JUST NODE.JS AT THE MOMENT
60. 6. WHAT CAN TRIGGER SERVERLESS FUNCTION?
61. API Gateway Amazon S3 DynamoDB Amazon Aurora Simple Notification Service Simple Email Service Amazon Cognito CloudWatch Kinesis Streams Kinesis Firehose AWS CloudFormation AWS CodeCommit Amazon Lex AWS Config AWS Snowball
62. 7. HOW DOES IT WORK WITH NODE.JS?
63. NODE WORKS PERFECTLY WITH LAMBDA
64. NODE WORKS PERFECTLY WITH LAMBDA Almost
65. PROS
66. • GOOD START-UP PERFORMANCE • SMALL MODULES • GOOD PERFORMANCE WITH LOW MEMORY AND CPU • SINGLE THREAD • ASYNC • EASY TO LEARN
67. CONS
68. • NODE_MODULES SIZE • SINGLE THREAD • ASYNC • EASY TO LEARN BUT EASY TO FUCKUP
69. FRAMEWORKS
70. • SERVERLESS FRAMEWORK • CLAUDIA.JS • APEX
71. CLAUDIAJS.COM
72. CLAUDIAJS.COM > 64.000 DOWNLOADS
74. “HELLO WORLD”
75. 'use strict' const Api = require('claudia-api-builder') const api = new Api() const excuse = require('huh') api.get('/', () => { return excuse.get() }) module.exports = api api.js
76. claudia create \ --region eu-central-1 \ --api-module api deploy
77. { "lambda": { "role": "geeknight-executor", "name": "geeknight", "region": "eu-central-1" }, "api": { "id": "d1weoszyg7", "module": "api", "url": "https://d1weoszyg7.execute-api.eu-central-1.amazonaws.com/latest" } } result
78. http://bit.ly/2pfNjGL
80. CHATBOTS
82. 8. WHEN SHOULD I USE SERVERLESS?
83. OR EVEN MORE IMPORTANT
84. WHEN YOU SHOULD NOT USE SERVERLESS?
85. • 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
86. 8 1/2. WAIT, WHAT ABOUT THE NAME?
87. WELL…
90. “Why The Future Of Software And Apps Is Serverless" by Ken Fromm
92. AWS LAMBDA
94. API GATEWAY
95. “Servers are dead.." by Ant Stanley
96. “Servers are dead.." by Ant Stanley
97. JAWS BECOMES SERVERLESS FRAMEWORK
99. “SERVERLESS” IS JUST A NAME. WE COULD HAVE CALLED IT “JEFF” Paul Johnston
100. NOW
101. SERVERLESS IS EVERYWHERE
102. THAT'S IT.
 THANKS!
103. QUESTIONS? twitter.com/slobodan_ speakerdeck.com/slobodan/ 8-1-2-things-about-serverless