This document discusses solving scalability problems for a monolithic .NET application by converting it to microservices using Google Cloud Platform (GCP). It describes the challenges of scaling a monolithic application and outlines the steps taken to break the application into microservices running on Kubernetes Engine. Key steps included converting virtual machines to containers, separating the monolith into independent services, further dividing services into micro-components, and handling the database and scheduler services.

1. SOLVING SCALABILITY PROBLEM
BY CONVERTING MONOLITH APPLICATION
INTO MICROSERVICES USING GCP
Artem Nikulchenko
CSA, TEAMWORK COMMERCE

2. Our product has been positively appraised by 200+ clients in 9
countries: the USA, Canada, Mexico, Brazil, Japan, the UK, Peru,
China, and France. In 2019-2020, we expect Teamwork
Commerce Suite to be introduced in 20 more countries.

3. Database
IPAD POS
.NET
MS SQL
Server
Scheduler
Client /
Presentation
Tier
3-tiers .NET architecture3-tiers .NET architecture
Application
Tier

4. Application
Compute Engine
Secondary Replica
Compute Engine
Secondary Replica
Compute Engine
Primary Replica
Compute Engine
Scheduler
Compute Engine
Application
Compute Engine
Application
Compute Engine
Cloud Load
Balancing
Scaling monolith applicationScaling monolith application
SQL Server AG

5. • OS overhead
• Scaling everything as «one package»
• Not much automation for VM scaling
• Slow VM start result in inability to react to load spikes
• What to do with a Scheduler?
• What to do with a DB?
Monolithic scale challengesMonolithic scale challenges

6. Containers and KubernetesContainers and Kubernetes
Virtualized Deployment
Hardware
Operating System
Hypervisor
Container Deployment
Hardware
Operating System
Container Runtime
App
Bin/Library
Container
App
Bin/Library
Container
App
Bin/Library
Container
Bin/Library
Operating System
App App
Virtual MachineVirtual Machine
Bin/Library
Operating System
App App
Traditional Deployment
Hardware
Operating System
App App App

7. Monolithic Application
Compute Engine
Monolithic Application
Kubernetes Engine
Converting VM into ContainerConverting VM into Container

8. identity
Kubernetes Engine
Secondary Replica
Compute Engine
Secondary Replica
Compute Engine
Primary Replica
Compute Engine
Scheduler
Compute Engine
Application
Compute Engine
data-sync
Kubernetes Engine
Cloud Load
Balancing
SQL Server AG
Separating monolith into micro-servicesSeparating monolith into micro-services

9. SQL
Compute Engine
Cloud Load
Balancing
identity-service
Kubernetes Engine
redis
Kubernetes Engine
redis
Kubernetes Engine
data-preload
Kubernetes Engine
data-preload-cron
Kubernetes Engine
data-sync-worker
Kubernetes Engine
data-sync-service
Kubernetes Engine
sync-cashe
Cloud Storage
74
35 6
12
8
Converting micro-services into micro-componentConverting micro-services into micro-component

10. cron
Kubernetes Engine
dispatcher
Kubernetes Engine
worker
Kubernetes Engine
worker
Kubernetes Engine
worker
Kubernetes Engine
Converting Scheduler into Cron-Dispatcher-Worker patternConverting Scheduler into Cron-Dispatcher-Worker pattern

11. Google Cloud Spanner
The first scalable, enterprise-grade, globally-
distributed, and strongly consistent database
service built for the cloud specifically to combine
the benefits of relational database structure with
non-relational horizontal scale.
 ACID transactions
 High Availability through synchronous replication
 Schemas
 SQL Queries (ANSI 2011 with extensions)
 Scale Horizontally
 Managed by Google
Micro Cloud SQL
User
Interface
Database
Microservice
Database
Microservice
Database
Microservice
Database
Microservice
Microservice
What about DB?What about DB?

12.  Organization challenges
Last but not least…Last but not least…
 Health monitoring
 Versions control
 Documentation (architecture)

13. Google Cloud
https://cloud.google.com/
Google Kubernetes Engine
https://cloud.google.com/kubernetes-engine/
Coursera «Architecting with Google Kubernetes Engine Specialization»
https://www.coursera.org/specializations/architecting-google-
kubernetes-engine
Google Professional Cloud Architect certification
https://cloud.google.com/certification/cloud-architect
teamworkcommerce.com
E-mail: an@cloudwk.com
Linkedin: www.linkedin.com/in/artem-nikulchenko/