Effortless Serverless - KharkivJS

What is serverless, how does it work and why should you care? How does it compare to some things we use everyday

This talk explains how we used to build apps and serve them, to what serverless is. It also gets you started quickly, what can you gain from serverless along with where you should use it and where not

Transcript

1. Effortless Serverless @simalexan Aleksandar Simovic JS Belgrade meetup organizer Serverless Apps with Node and Claudia.js Author of
2. @simalexan Aleksandar Simovic Software consultant JS Belgrade meetup organizer Twitter: @simalexan Github: simalexan
3. @simalexan + =
4. @simalexan SO…
5. @simalexan A FAIL STORY
6. @simalexan STARTUP INNOVATIVE HIPSTER UNICORN with VCs + AGILE and SCRUM… + millions $$$ + 200,000s users
7. @simalexan BUILDING APPS Customers (Angular) API Admin (Angular) Company site (Wordpress) Elastic Search Other services Owners (Angular) PG As engineers, this what we really want to do.
8. @simalexan SERVING CUSTOMERS What did we use (server-hosted) • Heroku • EC2 • Azure Development Staging Production Environments (per server) Building apps is the core, but we have to do run them too.
9. @simalexan ORGANIZE SERVING CUSTOMERS Customers (Angular) API Admin (Angular) Company site (Wordpress) Elastic Search Other services Owners (Angular) PG x 3 Server Server Server Big A** Server
10. @simalexan PLANNING CUSTOMERS • CAPACITY PLANNING • RENT + CONFIGURE MACHINES
 (prepare our servers) • DEPLOYMENT
 ssh, rsync • SCALE, BALANCE
11. @simalexan SEEMS NORMAL
12. @simalexan BUT IN REALITY
13. @simalexan WHAT HAPPENED? • Marketing set an unannounced advertising.
 100,000 new users in 1h > crashed immediately - “Next time, we’ll be better.” • 2 months later
 DDoS attack > 48 service NA • 1 month later. 
 Elastic search overflowed > API crashed > Web apps stuck • Three months later? - “Next time, we’ll be better.”
14. @simalexan “Why not just get bigger servers and estimate better?” MANAGEMENT:
15. @simalexan
16. @simalexan BIGGER SERVERS
17. @simalexan TOTAL COST ~ $3000 per month
18. @simalexan MORE CUSTOMERS COMPLEXITY MORE SERVERS PROBLEMS Why?
19. @simalexan Average API server usage Usage Intervals 35% 60% 80% 06 09 12 15 18 70% 45% 21 00 03 06 0% 100% This is normal. Good? Price: 100$
20. @simalexan What if we change perspective?
21. @simalexan Average API server WASTED TIME Intervals 65% 40% 20% 99% 30% 55% 95% 99% 0% 100% Bad enough? Waste 06 09 12 15 18 21 00 03 06
22. @simalexan ~ 62.8% wasted resources ~ $1900
23. @simalexan UNEXPECTED PEAK? Usage Intervals 35% 60% 110% 70% 45% 0% 100% New customers are a problem ?! “Unexpected” peak new capacity 06 09 12 15 18 21 00 03 06 =
24. @simalexan Yes, we can burn more! Because, why not?
25. @simalexan new API server usage Usage Intervals 28% 54% 80% 63% 38% 0% 100% We are “safe” now! Buffer New Price: 150$ - (if you’re lucky) 06 09 12 15 18 21 00 03 06
26. @simalexan Need more servers?
27. @simalexan Just do it! We have a million dollar investment!
28. @simalexan USUAL ISSUES • Most of the time waiting for a request • Maximum capacity • One service can eat up the memory and kill others • Recovery time (2-7h) • Sometimes you have to call your DevOps • It’s stupid to run just one small application • Renting a new server and setup takes > 1h
29. Similar to?
30. Washing machines? Really?
31. @simalexan < 5kg Processing machine Different clothes Max weight Can be bigger > handles more Can be smaller > more efficient
32. @simalexan USUAL ISSUES • Mostly waiting for clothes • Maximum capacity • One cloth color can spoil the other - my special princess dress • Recovery time (2h - 1 day) • Sometimes you have to call the plumber • Buying a new washing machine and setting it up >2h • Its stupid to wash just one shirt
33. @simalexan
34. @simalexan Feels familiar?
35. @simalexan • Mostly waiting for requests • Max capacity • One service can eat up the memory and kill others • Recovery time (2-7h) • Sometimes you have to call the DevOps • It’s stupid to run one small service • Renting a new server and setup
 takes > 1h • Mostly waiting for clothes • Max capacity • One cloth color can spoil the other • Recovery time (2h - 1 day) • Sometimes you have to call the Plumber • It’s stupid to wash one shirt • Buying a new washing machine and setup > 1h Can’t be the same?
36. @simalexan How did the laundry industry evolve? 1934. First “Laundromat” 1950s Mass Laundromats 1970s 2000s First “Fluff and Fold” Mass “Fluff and Fold” = decline of laundromats
37. @simalexan Fluff and Fold • Cleaning service with pickup and delivery • Pay per item • Can clean 1 or 1000 clothes Disclaimer: The name didn’t originate from 4chan.
38. @simalexan you don’t care about washing machines and their detergent setup Fluff and Fold means
39. @simalexan you don’t care about max capacity and plumbers Fluff and Fold also means
40. @simalexan How did our industry evolve? 2001. First “VPS” 2005 Mass VPS The “Cloud” ? ?
41. @simalexan Is serverless our “Fluff and Fold”?
42. @simalexan Or is serverless just a bad advertising..?
43. @simalexan Like this?
44. @simalexan SERVERLESS •Method of running and deploying software without renting or buying a server •Pay per request execution •Can scale services from 1 to 1000
45. @simalexan you don’t care about servers and server configuration Serverless means
46. @simalexan you don’t care about scaling and balancing Serverless also means
47. @simalexan you don’t care about max capacity and DevOps Serverless also means
48. @simalexan Serverless does not exclude the existence of servers. SERVERLESS But it does however, have a name.
49. @simalexan HOW DOES IT WORK? A micro isolated environment with everything your code needs 
 a plant pot Treats your code as a function Function containers
50. @simalexan AUTOSTART No request? function () function () Request Cold start: up to few seconds
51. @simalexan HOW DOES THAT HELP?
52. @simalexan EVENT DRIVEN FUNCTION SCALING function () function () Request! Request! Request! Request! Request! Request! Request!
53. @simalexan EMPHASIZES RESTRUCTURING and MICRO SERVICES
54. @simalexan Server hosted API structure Login Generate PDF Products Orders Send Emails Payment Users Shopping Cart Chatbot Reports Process pictures Register API File storage Database API endpoints
55. @simalexan Scaling a server hosted API File storage Database Logi Gen Pro Ord Sen Pay Use Sho Cha Rep Proc Regi API endpoints Logi Gen Pro Ord Sen Pay Use Sho Cha Rep Proc Regi API endpoints Logi Gen Pro Ord Sen Pay Use Sho Cha Rep Proc Regi API endpoints Logi Gen Pro Ord Sen Pay Use Sho Cha Rep Proc Regi API endpoints
56. @simalexan Serverless API structure Generate PDF File storage Database API Gateway Login Register Orders Users Chatbot Process pictures Shopping Cart Products Payment Reports Send Emails
57. @simalexan Orders Scaling a serverless API API Gateway Login Register Orders Users Chatbot Shopping Cart Products Payment Send Emails Products Products Products Products Orders Some are more used than others! Some are not used at all!
58. @simalexan You don’t pay if no one is using it Serverless also means
59. @simalexan PROVIDERS (most notable) AWS Lambda Azure Function Google Cloud Function IBM OpenWhisk
60. @simalexan PRICING AWS Lambda $0.0000002 PER REQUEST $0.000000834 PER REQUEST 100ms @ 512MB 1,000,000 REQUESTS PER MONTH FREE NEXT ~ $0.20 TOTAL VARIOUS SIZES PER MILLION
61. @simalexan PRICING $0.000016 GB-s $0.000000586 PER REQUEST 100ms @ 512MB 1,000,000 EXECUTIONS PER MONTH FREE NEXT ~ $0.20 TOTAL VARIOUS SIZES PER MILLION Azure Function
62. @simalexan PROGRAMMING LANGUAGES?
63. @simalexan AWS Lambda SHELL SCRIPTS ANY EXECUTABLE
64. @simalexan SHELL SCRIPTS ANY EXECUTABLE Azure Function
65. @simalexan How does it work with AWS Lambda Example
66. @simalexan ’use strict’ exports.handler = (event, context, callback) => { callback(null, ’Hello World’); } index.js
67. @simalexan Deploy? 1. IMPLEMENT FUNCTION 2. UPLOAD ZIP 3. CREATE API GATEWAY 5. SET PERMISSIONS 4. SET TRIGGERS
68. @simalexan Frameworks / Tools? - Amazon SAM - Claudia.js - Serverless framework - Amazon CodeStar - Apex
69. @simalexan claudiajs.com > 120.000 downloads
70. @simalexan
71. @simalexan Characteristics • Deploy with a single command • Get started quickly, flat learning curve • No boilerplate • Use standard NPM modules • Multiple versions very easily
72. @simalexan ’use strict’ const Api = require(’claudia-api-builder’) const api = new Api() api.get(‘/’, () =>”Hello Kharkiv!”) module.exports = api index.js
73. @simalexan claudia create \
 —-region eu-central-1 \
 —-api-module index claudia update in your console/terminal
74. @simalexan { "lambda": { "role": "kharkivjs-executor", "name": "kharkivjs", "region": "eu-central-1" }, "api": { "id": "<lambda-id>", "module": "index", "url": "https://<lambda-id>.execute- api.eu-central-1.amazonaws.com/latest" } } the result
75. @simalexan
76. @simalexan
77. @simalexan
78. @simalexan Why is serverless important?
79. @simalexan autoscaling Serverless has
80. @simalexan improved stability and autofailover Serverless has function () Orders Chatbot Send Emails Products
81. @simalexan focuses on business logic, not configuration Serverless
82. @simalexan minimal maintenance Serverless has
83. @simalexan costs less Serverless USED TIME RESERVED
84. @simalexan Servers have become a commodity Just as water evolved to be pay-per-use
85. @simalexan Isn’t good for? Serverless
86. @simalexan - Real time applications with Sockets - Extremely low latency apps < 100ms - Long running tasks - Very specific configurations - Need an SLA NOT GOOD FOR
87. @simalexan Is good for? Serverless
88. @simalexan GOOD FOR • Web APIs • Micro services • Chatbots • IoT • File/Image processing • Rapid prototyping, very quick “time to deploy”
89. @simalexan “Hidden” Benefits?
90. @simalexan REFACTORING • Makes sense as it has a financial incentive • Better code, less cost • No more: “Well, its working OK…”
91. @simalexan CODE EFFICIENCY • Slower code has bigger repercussions. • Algorithms having a stronger impact 
 (start reading)
92. @simalexan PRODUCTION • CodePen - Claudia.js for preprocessors • MindMup • Autodesk - Forgeviewer • Shippo
93. @simalexan SUMMARY • Serverless means no server configuration • Autoscaling and autofailover • Function deployment • Effortless with Claudia.js • Event driven • Rapid deployment • Works great with Node.js
94. @simalexan Look Mama, a server rack!
95. @simalexan SERVERLESS CAMP
96. @simalexan effortless-serverless.com claudiajs.com Serverless Apps with Node and Claudia.js Just during KharkivJS Get the book 40% off with ctwkharkivjs