journey to cloud-native: where to start in your app modernization process
TRANSCRIPT
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Journey To Cloud-Native: Where To Start In Your App Modernization Process
Kamala Dasika Michael Villiger
@DasikaKN @MikeVilliger
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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
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Enterprises operating at startup speeds
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Enterprise Application Portfolio
Built for Cloud Native
New Initiatives FREEDOM: RunYourApponAnyCloud
AUTOMATION: LowerOpsCostandIncreasesVelocity
RESILIENCY: Auto-Scale,Blue-greenDeploys,HealthMgmt.
GOVERNANCE: CommonDeveloper-Self-ServicedFrameworks
VISIBILITY: FullStackLogging,Monitoring&Auditability
SPEED: CutCycleTimefromMonthstoDays/HoursModernize to Cloud-Native?
Existing Workloads
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Evaluating the Enterprise App Portfolio
BUSINESS ECONOMIC TECHNICAL
• Codebase• Suitableframework/runLme• RelaLvelylightweightfootprint• No“hardwired”filesystem
dependencies• Usage/workload
• BusinesscriLcality• Risktolerance• Changefrequency• Lifecyclestage• Domainexpertavailability
• Licensingcosts(HW/SW)• Time-to-marketimplicaLons• Revenueimpact-fullness
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Iden%fying Candidates for Refactoring -Mul%ple Lenses
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LensOne:UserExperienceandBehaviorAnalyLcs
• RealUserMonitoringcanquicklyexposecandidatesforrefactoringbasedonacLvity
• LookingatacLonfrequency,wecanidenLfyhighrisk/highrewardfuncLonalityformajorimpact
• Conversely,wecanidenLfylowriskandlessfrequentlyaccessedfuncLonalityforproofofconceptrepla_orming
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LensOne:UserExperienceandBehaviorAnalyLcs
• RealUserMonitoringcanalsohelpusfindcandidatesbasedonacLonduraLon
• LookingatduraLon,wecanidenLfypoorlyperformingfuncLonalitytopursueimprovementsthatwillhaveimmediateuserimpact
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LensOne:UserExperienceandBehaviorAnalyLcs
• Combiningthetwometrics,wecanlookattopconsumers;acLonsthattakealongLmeandarefrequentlyaccessed
• Intermsofimpact,thiscompoundmetricwouldquicklyexposefuncLonalitythathasthemostimpactforenduserexperience
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LensTwo:Topology+DependencyDiscoveryandInfrastructureMetrics
• UsingServiceFlow,understandthefrequencyofinteracLons,percentageofinteracLonsandcontribuLonpercentagetorankapplicaLonLersbasedonriskandimpact
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LensTwo:Topology+DependencyDiscoveryandInfrastructureMetrics
• ULlizeautomaLcenvironmentmappingtounderstandtopologyofenLreenvironment
• UnderstandthefullendtoendmapofdependenciesforexisLngservices
• Thiswillalsoexposedependenciesteamswerenotawareof;i.e.communicaLonsbetweenservicesthatwereunexpected
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LensTwo:Topology+DependencyDiscoveryandInfrastructureMetrics
• MapandunderstandresourceconsumpLontoidenLfyheavyconsumers• FromtheIaaS/Hypervisor• TotheVirtualMachine• Totheprocess• Totheservice
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Replatforming and Modernization
APP
APP
APPµService
µServiceAPP
APP
APP
µService
APPLICATIONREPLATFORMING APPLICATIONMODERNIZATION
The“Push”Approach The“Pull”Approach1. Pushtheapp2. Seewhatfails3. Writeatest4. Gettheteststopass5. Writedownyourrecipes
1. Buildnewfeaturesasmicroservices2. Findtheseams3. Writetests4. Refactorcodearoundseams5. Getyourteststopass
APP
APP
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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
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Example
Source: Monolith->Microservices: A Guided Adventure by Mike Gehard
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UnderstandServiceInteracLonsInsidetheWellStructuredMonolith
• Withthewellstructuredmonolith,definecustomservicesaroundtheseboundedcontexts
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
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UnderstandServiceInteracLonsInsidetheWellStructuredMonolith
• WiththesecustomserviceswedigdeeperintointeracLonswithinthemonolith,transformingvisibility
fromthis:
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UnderstandServiceInteracLonsInsidetheWellStructuredMonolith
• WiththeaddiLonalvisibilityconLnuetodiscoverandmapdependencies
tothis:
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UnderstandServiceInteracLonsInsidetheWellStructuredMonolith
• AnduLlizetheserviceflowtodriveeffortstoidenLfytheboundedcontextstomovetoalooselycoupledmicroservice
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MonitorImpactDuringRepla_orming:UserExperience
• ConLnuetotrackuserexperienceviaRealUsermonitoringduringrepla_ormingeffortstovalidateandtrackeffortstoimprovetheuserexperience.
• EnsureregressionsareidenLfiedquicklyandrolledback,evenwhenusingblue/greendeployments
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MonitorImpactDuringRepla_orming:UserExperience
• RealUserMonitoringexposesbusinesstargetsaswell.Trackconversionpercentagesandtrendstomeasureimpactofsuccessfulrepla_ormingefforts
• EnsureregressionsareidenLfiedquicklyandrolledback,evenwhenusingblue/greendeployments
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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
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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
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Next Webinar
Journey to Cloud-Native: Continuous Delivery with Artificial
Intelligence
Download
Dynatrace Service Broker for PCF
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© 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