Evolving to serverless by Mr. Victor Alexander

1. PAGE1
DEVOPSINDONESIA
Victor Alexander
Jakarta, 5 Mei 2020
Evolving to Serverless

2. Speak er Profile
1. Infrastructure Lead - Site Reliability Engineer at
Moka
2. Previous:
- Principal System Engineer - GDPLabs
3. victor.alexander@ mokapos.com
victoroloan@ gmail.com

3. Moka is a technology company providing
cloud-based Point-of-Sale and payment
solutions that empowers businesses to
better sell and grow. Moka is currently
present across 200+ cities in Indonesia
with over 30,000 merchants.
To Bring Business
Ecosystem to
Everyone
VISION
Empowering
Businesses
to Sell and Grow
MISSION
W hat is ?

4. Our Products
M oka P OS
Dashboard & Report
Sync Bill & Split Bill
Ingredient & Inventory
Loyalty Program
Table Management
and many more!
Moka Pay Moka Capital Moka Connect

5. Overview
W hat is Serverless
W hy Serverless
Cost and Ops Benefit
Sample Usage
Tips

6. W hat is Serverless ?
Serverless allows you to build and run applications and
services without thinking about servers.
- https://aws.amazon.com/serverless/
Google Cloud’s serverless platform lets you write code your
way without worrying about the underlying infrastructure.
- https://cloud.google.com/serverless

7. Source: https://www.trustradius.com/buyer-blog/do-you-need-iaas-caas-paas-or-faas

8. W hy Serverless?
No need to w orry about scaling
Less to m aintain (shift provision and scaling to
som eone else)
Pay only w hen it getting used (function call) rather
than pay for w hat has been provisioned, i.e EC2

9. W hen Serverless?
W rite Code, Ship It, Repeat
❏ Code size minimal
❏ Short-lived process
❏ Minimise cost for unused resources
❏ Deployment independently
❏ Fast Deployment

10. W hen Serverless?
If using cloud
● Fine with vendor lock-in (AW S, GCP, etc)
● Tightly coupled to cloud resources
○ API Gateway, S3, CloudW atch
OpenSource
● OpenFaaS
● Apache OpenW hisk
● Kubeless

11. W hen Serverless?
Analytics ?
● AW S Athena
● GCP BigQuery

12. Benefit - Cost
EC2 and LoadBalancer
2 instances (t3.m edium ) x 0.0528 USD x 730 hours in m onth = 77.09 USD (m onthly on Dem and cost)
Am azon EC2 On-Dem and inst ances (m ont hly): 77.09 USD
50 GB x 0.12 USD x 2 instances = 12.00 USD (EBS Storage Cost)
Am azon Elast ic Block St orage (EBS) pricing (m ont hly): 12.00 USD
1load balancers x 0.028 USD x 730 hours in a m onth = 20.44 USD
Classic Load Balancer fixed hourly charges (m ont hly): 20.44 USD
1classic load balancers x 100 GB total bytes processed per CLB x 0.008 per GB = 0.80 USD
Classic Load Balancer Dat a Processing charges (m ont hly): 0.80 USD
Tot al: 110.33 USD (m ont hly)

13. Benefit - Cost
Lambda - 15Mil / Month & 512MB Memory Allocation
Pricing calculations
RoundUp (500) = 500 Duration rounded to nearest 100ms
15,000,000 requests x 500 ms x 0.001 ms to sec conversion factor = 7,500,000.00 total compute (seconds)
0.50 GB x 7,500,000.00 seconds = 3,750,000.00 total compute (GB-s)
3,750,000.00 GB-s - 400000 free tier GB-s = 3,350,000.00 GB-s
Max (3350000.00 GB-s, 0 ) = 3,350,000.00 total billable GB-s
3,350,000.00 GB-s x 0.0000166667 USD = 55.83 USD (monthly compute charges)
15,000,000 requests - 1000000 free tier requests = 14,000,000 monthly billable requests
Max (14000000 monthly billable requests, 0 ) = 14,000,000.00 total monthly billable requests
14,000,000.00 total monthly billable requests x 0.0000002 USD = 2.80 USD (monthly request charges)
55.83 USD + 2.80 USD = 58.63 USD
Lam bda cost s - W it h Free Tier (m ont hly): 58.63 USD

14. Benefit - Ops

15. Benefit - Ops

16. Benefit - O ps
More time to improve other things
● Logging
● Monitoring
● CI/CD
● etc

17. Benefit - Security
OS Attack
SSH
Vulnerability
W ebserver Bug
/ CVE

18. Draw backs?
Vendor Control and Lock-In
● Max execution duration
● Concurrent connection
Testing and debugging become more challenging

19. Test Local ?

20. Sam ple - Im age R esizing

21. Sam ple - Im age R esizing

22. Sam ple - Im age R esizing

23. Sam ple - Chat B ot

24. Dem o
-- buat service via aws-sam atau serverless
framework di aws untuk image resize --
atau
-- bot start stop ec2 instance di aws --

25. Tips
Maxim um duration of function
Mem ory allocation
Lightw eight function
Num ber of concurrent connection
Cold Start

26. PAGE26
DEVOPSINDONESIA
Alone We are smart, together We are brilliant
THANK YOU !
Quote by Steve Anderson