Initiatives to modernize applications to a cloud-native architecture begin with big questions - where do I start, what applications would require the most changes, and what is the user impact? Join Mike Villiger from Dynatrace and Kamala Dasika from Pivotal as they take you step-by-step from planning through scoping strategies, so you can begin your app modernization journey today. In this webinar, you will learn how to: - Discover dependencies in your applications - Identify parts of your applications that are good candidates for refactoring - Minimize customer impact during migration - Deliver business value through measurable digital transformation View Complete Webinar Series at https://content.pivotal.io/webinars: - Journey to Cloud-Native: Where to start in your app modernization process - Journey to Cloud-Native: Continuous Delivery with Artificial Intelligence - Journey to Cloud-Native: Making Sense of Your Service Interactions - Journey to Cloud-Native: Reducing Production Risks at Scale About the Speakers: Kamala Dasika has been working on the Cloud Foundry product team since its inception in 2011 and previously held various product or engineering positions at VMware, Tibco, SAP and Applied Biosystems. Mike Villiger helps Dynatrace customers implement Application Performance Management technologies and processes in the worlds of Public/Private Cloud, DevOps, Platform-as-a-Service (PaaS) and NoSQL.

1. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Journey To Cloud-Native:
Where To Start In Your App
Modernization Process
Kamala Dasika Michael Villiger
@DasikaKN @MikeVilliger

2. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Changing Model for Application Delivery
Development Deployment
Sparingly at
designated times
Ready for prod at
any time
Architecture
Abstraction
Layer
“Day 2” Ops
App Server on Machine
App on “disposable”
infrastructure
Monolithic App
Microservices /
Composite app
Linear / Sequential
Short cycles, test
driven, iterative
Many tools, ad hoc
automation
Manage services,
not servers

3. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
3
Enterprises operating at startup speeds

4. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Enterprise Application Portfolio
Built for Cloud Native
New Initiatives
FREEDOM: Run Your App on Any Cloud
AUTOMATION: Lower Ops Cost and Increases Velocity
RESILIENCY: Auto-Scale, Blue-green Deploys, Health Mgmt.
GOVERNANCE: Common Developer-Self-Serviced Frameworks
VISIBILITY: Full Stack Logging, Monitoring & Auditability
SPEED: Cut Cycle Time from Months to Days/Hours Modernize to Cloud-Native?
Existing
Workloads

5. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Evaluating the Enterprise App Portfolio
BUSINESS ECONOMIC TECHNICAL
• Codebase
• Suitable framework / runLme
• RelaLvely lightweight footprint
• No “hard wired” file system
dependencies
• Usage / workload
• Business criLcality
• Risk tolerance
• Change frequency
• Lifecycle stage
• Domain expert availability
• Licensing costs (HW / SW)
• Time-to-market implicaLons
• Revenue impact-fullness

6. Iden%fying Candidates for Refactoring
-Mul%ple Lenses

7. ©2017 Dynatrace
Lens One: User Experience and Behavior AnalyLcs
• Real User Monitoring can quickly
expose candidates for
refactoring based on acLvity
• Looking at acLon frequency, we
can idenLfy high risk/high
reward funcLonality for major
impact
• Conversely, we can idenLfy low
risk and less frequently accessed
funcLonality for proof of
concept repla_orming

8. ©2017 Dynatrace
Lens One: User Experience and Behavior AnalyLcs
• Real User Monitoring can also
help us find candidates based on
acLon duraLon
• Looking at duraLon, we can
idenLfy poorly performing
funcLonality to pursue
improvements that will have
immediate user impact

9. ©2017 Dynatrace
Lens One: User Experience and Behavior AnalyLcs
• Combining the two metrics, we
can look at top consumers;
acLons that take a long Lme and
are frequently accessed
• In terms of impact, this
compound metric would quickly
expose funcLonality that has the
most impact for end user
experience

10. ©2017 Dynatrace
Lens Two: Topology + Dependency Discovery and Infrastructure Metrics
• Using Service Flow, understand the frequency of interacLons, percentage of interacLons and
contribuLon percentage to rank applicaLon Lers based on risk and impact

11. ©2017 Dynatrace
Lens Two: Topology + Dependency Discovery and Infrastructure Metrics
• ULlize automaLc
environment mapping to
understand topology of
enLre environment
• Understand the full end to
end map of dependencies
for exisLng services
• This will also expose
dependencies teams were
not aware of; i.e.
communicaLons between
services that were
unexpected

12. ©2017 Dynatrace
Lens Two: Topology + Dependency Discovery and Infrastructure Metrics
• Map and understand resource
consumpLon to idenLfy heavy
consumers
• From the IaaS/Hypervisor
• To the Virtual Machine
• To the process
• To the service

13. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Replatforming and Modernization
APP
APP
APP
µService
µService
APP
APP
APP
µService
APPLICATION REPLATFORMING APPLICATION MODERNIZATION
The “Push” Approach The “Pull” Approach
1. Push the app
2. See what fails
3. Write a test
4. Get the tests to pass
5. Write down your recipes
1. Build new features as microservices
2. Find the seams
3. Write tests
4. Refactor code around seams
5. Get your tests to pass
APP
APP

14. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Breaking the Monolith
Picking the Seams
• Analyze
– Inbound and Outbound Coupling
– Databases & Data Stores
– Transaction Boundaries
• Modes of Communication?
• Use Cases/User Journeys
• Business Processes
• Ubiquitous language
– Nouns & Resources
– Verbs & Operations
• Separated models for reading and writing
• Organizational semantics
– Team Organization and Structure
Source: Webinar - “Breaking the Monolith”
by Rohit Kelapure

15. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Example
Source: Monolith->Microservices: A Guided Adventure by Mike Gehard

16. ©2017 Dynatrace
Understand Service InteracLons Inside the Well Structured Monolith
• With the well structured
monolith, define custom
services around these
bounded contexts
Well-structured Monolith
Presenta%on
Business
Logic
Data Access
Presenta%on
Business
Logic
Data Access
Presenta%on
Business
Logic
Data Access
API
API
user
order
item

17. ©2017 Dynatrace
Understand Service InteracLons Inside the Well Structured Monolith
• With these custom services
we dig deeper into
interacLons within the
monolith, transforming
visibility
from this:

18. ©2017 Dynatrace
Understand Service InteracLons Inside the Well Structured Monolith
• With the addiLonal visibility
conLnue to discover and
map dependencies
to this:

19. ©2017 Dynatrace
Understand Service InteracLons Inside the Well Structured Monolith
• And uLlize the service flow
to drive efforts to idenLfy
the bounded contexts to
move to a loosely coupled
microservice

20. ©2017 Dynatrace
Monitor Impact During Repla_orming: User Experience
• ConLnue to track user
experience via Real User
monitoring during repla_orming
efforts to validate and track
efforts to improve the user
experience.
• Ensure regressions are idenLfied
quickly and rolled back, even
when using blue/green
deployments

21. ©2017 Dynatrace
Monitor Impact During Repla_orming: User Experience
• Real User Monitoring exposes
business targets as well. Track
conversion percentages and
trends to measure impact of
successful repla_orming efforts
• Ensure regressions are idenLfied
quickly and rolled back, even
when using blue/green
deployments

22. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
22
Application Portfolio Virtuous Cycle
$$$$
ROI Funds
Transformation
Replatform Modernize
Runs on PCF
Existing Workloads
Cloud Native
Built for PCF
New Initiatives
Auto-scaling High Availability Logging/Metrics Security
Zero Downtime Updates
…
Spring Cloud Services
Continuous Delivery
User Provided Services

23. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Migrating an ESB to a
Cloud Native Platform
Online Perf clinic –
Managing Cloud
Foundry with Dynatrace
Introducing the Dynatrace
Topology and Smartscape
API
Cloud Native Evolution –
How Companies Go
Digital
Transforming the
Monolith at 20 million
transactions/hour -
Comcast
Breaking the Monolith
Resources

24. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Next Webinar
Journey to Cloud-Native:
Continuous Delivery with Artificial
Intelligence
Download
Dynatrace Service
Broker for PCF

25. © Copyright 2017 Pivotal Software, Inc. All rights reserved.
Migrating an ESB to a
Cloud Native Platform
Online Perf clinic –
Managing Cloud
Foundry with Dynatrace
Introducing the Dynatrace
Topology and Smartscape
API
Cloud Native Evolution – How
Companies Go Digital
Transforming the
Monolith at 20 million
transactions/hour -
Comcast
Breaking the Monolith
Resources