From the event "Open Technologies & Digital Transformation in the Public Sector" that took place in Athens on December 11, 2018. A joint event by UniSystems - Red Hat - GFOSS Open Technologies Alliance

1. Putting Open Source to Work
at Greek Customers
Digital Transformation Case Studies
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Tassos Anagnostopoulos
Principal Solutions Architect
AnagnostopoulosT@unisystems.gr

2. Case#1: Modernization of a Core Banking System
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Large Greek Bank
wishing to modernize
their legacy Core
Banking System, in
order to:
Reduce time-to-market
of new functionality
Develop a unified
modern UI for the end
users
Improve maintainability
of system
Meet increasing digital
and mobile
requirements

3. Unisystems Copyright © 2019
Multi-tier
Loosely Coupled
Architecture
Employ latest
technologies
Increase
visibility into the
business logic
Shorten release
cycles
Project Goals

4. Previous Architecture (High-level)
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Mainframe
Branch
Server
Branch 1
Branch
ServerBranch n

5. New Architecture (High-level)
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Mainframe
Middleware
Cache Logs
Internal
Users
External
Users

6. Technology Overview
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M/F Layer
Employee Web App
Customer
Web App
Mobile App
Services
Middleware Layer
Channel Layer for
Employee Apps
Channel Layer for
Customer Apps
Proprietary
Channel Layer
for APIs
Other Internal &
External Systems
API Management

7. Middleware Layer Drilldown
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Application Server
Integration
Services
MIDDLEWARE LAYER
Business Rules
Management
Services
Business Process
Management
Services
Distributed Cache
Services
Logging Services

8. Open Source for the Enterprise
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Bank was not opposed to employing Open Source technologies,
provided that:
• All products were certified to be enterprise-ready
• There would be 24x7 product support
+

9. Product Mapping to Red Hat JBoss Middleware
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Red Hat JBoss
Enterprise Application Platform
Red Hat JBoss Fuse
Red Hat JBoss BPM Suite
(includes JBoss BRMS)
RedHatJBoss
DataGrid

10. Application Lifecycle Management
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Collaboration
Requirements
Management
Architecture Design
 MS Project, JIRAProject Management
Quality & Test Automation
Task Management
Build Environment
 Confluence
 Enterprise Architect
 JIRA, Confluence
 SonarQube, JUnit, Arquillian,
Soap UI, JMeter
 IDE plugins, Maven, Nexus,
Jenkins, GitLab
 Confluence, JIRA

11. Benefits & Impact of Changes
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 Ease of maintainability
significantly improved
 Automation of development and
testing processes
 Paving the road for adopting
Containers and DevOps
 Easy prototyping of new business
requests
 Much shorter release cycles
 Centralization of business logic
in a format understood by
business people
Business Technical

12. Case#2: Platform for e-Banking & Mobile Banking
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Large Greek Bank decided to fully redesign their e-Banking
& Mobile Banking customer-facing applications.
Key
Requirements:
Quick response to market
needs & legislative changes
Avoid vendor lock-in
Be cloud-ready
Key
Technology
Decisions:
Adopt Microservices
Architecture
Implement DevOps
practices
Go Open Source (with
professional support)

13. Evolution of the IT World
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14. Microservices Architecture
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15. DevOps with Containers
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source
repository
CI/CD
engine
dev container
physical
virtual
private cloud
public cloud

16. ?
Standards in Container Technology
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17. ?
Standards in Container Technology
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18. Selecting a Container Platform
• Choose a Container Platform that:
• Uses Docker for building and running containers
• Leverages Kubernetes for orchestrating containers at scale
• Is fully open-source
• Has a proven track record with large install base
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• Outcome:
• Red Hat OpenShift Container Platform

19. Benefits & Impact of Changes
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 Inherent resiliency & scalability
 Improved utilization of hardware
resources
 Guaranteed deployment
consistency
 Cloud-native; easy to move to public
cloud if needed
 Frictionless - Can quickly respond to
changes
 Ability to meet peak demands with
low cost infrastructure
 Easy prototyping of new business
requests
 Much shorter release cycles
Business Technical

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